Coolant Leak Repair Cost in 2026: You're Paying for Geography, Not Parts ($10 Cap to $3,500 Gasket)

Here's the sentence that explains every number on this page: in a coolant leak, you're not paying for the part — you're paying for geography. Almost every component in the cooling system costs $20-$300 at the parts counter. The bill is made by what sits between that part and the mechanic's hand. A hose in the open air: $150-$350. A water pump of similar part cost hiding behind the timing belt: $400-$800, because reaching it is a timing-belt job. A $50-$150 heater core buried behind the entire dashboard: $800-$1,300, of which nearly everything is the 8-12 hours of disassembly. And a head gasket — a $50-$250 piece of layered steel — costs $1,500-$3,500 because between it and daylight sits the cylinder head, the machine shop, and days of labor. The far end of that geography is the heater core, buried behind the dashboard — heater core replacement cost shows what the labor does to a cheap part.

Once you see the geography, the money strategy writes itself in three rules. Rule one: never pay to find what you can see — a 15-minute flashlight inspection locates the obvious majority of leaks, skipping the $60-$150 diagnostic fee. Rule two: pay for geography once — anything living on the same labor gets bundled: the belt with the pump, the thermostat with the housing, hoses and cap with the radiator. Rule three: never buy the expensive geography on a guess — the pressure test ($60-$150) names the source before a radiator is sold, and the block test ($10-$100) confirms a head gasket before anyone touches the cylinder head.

This guide prices all of it with verified 2026 numbers: every source from the $10 cap to the $3,500 gasket, the parts-vs-labor-vs-DIY math for each, the bundle questions worth $500+, the three traps this niche runs on wallets, and three real estimates decoded line by line. For finding the leak — the dipstick sort, the driveway protocol, the safety calls — our coolant leak diagnosis guide is the companion page; this one is about what happens to your money after the source has a name.

I built Pulscar — an AI tool that diagnoses car problems from a 30-second sound recording before you pay a mechanic — after spending $6,000 on misdiagnosed repairs. Cooling-system bills taught me the geography rule the expensive way: the same $60 part quoted at $180 and at $700 on two different engines, both quotes honest. This page is that lesson, priced.

How to use this guide

If you already know what's leaking: jump to the navigator, land on your source's section, and take the fair number plus the bundle question to the shop. If you don't know yet: the self-inspection below finds the obvious leaks free, and the diagnosis guide runs the full protocol for the rest. One rule overrides everything: no repair gets authorized until the source has a name and the geography has a bundle check. The two most expensive sentences in this niche are "just find and fix whatever's leaking" (open scope) and "we'll do the pump now and the belt later" (same labor, paid twice).

First: which money page do you need? The 2-minute filter

You haven't located the leak yet, or there are safety symptoms (rising gauge, milky oil, white smoke) → the diagnosis guide first — it has the dipstick sort, the driveway protocol, and the stop-driving calls. This page prices what it finds.

The engine is overheating right now → the overheating guide has the roadside sequence; the causes map sorts leak-driven overheating from fan and airflow problems.

White smoke and you're bracing for the worst → the white smoke guide separates winter condensation from the real flag, and Source 8 below prices the real one — after the test.

A head-gasket verdict is already on the table → the head gasket guide owns that decision: fair pricing ($2,475-$3,246 RepairPal band), the machining line, and the fix-vs-value worksheet.

The puddle is brown and oily, not bright and sweet → different fluid, different money page: oil leak repair costs.

You know (or suspect) the source and want the fair price, the DIY call, and the bundle math → the right page. Continue.

The 15-minute self-inspection: skip the $60-$150 fee

Step 1 — The puddle (2 min). Color and position: coolant is deliberately bright — green, orange, pink, blue — and slightly greasy. Clear, odorless water under the AC on a hot day is normal condensation, not a leak. Cardboard under the engine overnight beats memory.

Step 2 — Hose ends and clamps (3 min, engine cold). Squeeze each hose: firm with slight give is healthy; mushy, rock-hard, or cracked means replacement. White or coolant-colored crust at a clamp is a leak's dried signature — and hose ends are where most leaks on this page live.

Step 3 — Radiator end tanks (2 min). Both plastic sides, where they crimp to the aluminum core: wet streaks, crust, or visible cracks. The classic failure past 100K.

Step 4 — Weep hole and reservoir (3 min). Flashlight under the water pump: moisture at the weep hole is the seal's resignation letter. Then the reservoir's bottom seams and mounts — and the cap's rubber seal, because a $10-$40 cap that won't hold pressure impersonates everything else here.

Step 5 — The cabin check (2 min). Heat on full: sweet smell from the vents, greasy film fogging the glass, damp passenger carpet — three yeses is the heater core.

Found it? You just earned $60-$150 and the right to say the most valuable sentence in car repair: "the [part] is leaking at [location] — quote that specifically." Found nothing but coolant keeps dropping? Now the pressure test is money well spent — and the UV dye kit ($15-$30) is the DIY middle path: fluorescent dye in the coolant, a blacklight after a drive, and the leak glows. Same method the shops use.

Find your situation: eight ways people arrive here

"I'm holding a quote and want to know if it's fair." → The ladder and your source's section below have the 2026 band; the traps section has the padding patterns; the overcharging guide has the escalation if it's ugly.

"I want to fix it myself if that's realistic." → The DIY column in the comparison below draws the honest line: caps, hoses, reservoirs, often radiators = yes; anything behind the belt, dash, or head = geography says no.

"The shop wants $150 just to find it." → Run the 15-minute inspection first. If the leak is visible, the fee is skippable; if it isn't, ask the crediting question — "is the diagnostic credited toward the repair?" — before authorizing.

"Water pump quote — should the timing belt happen too?" → Route through Source 6: if the belt drives the pump, bundling saves the shared 3-5 hours of labor — the single biggest legitimate saving on this page.

"Heater core quote is $1,100 and the car is worth $4,000." → Source 7 has the honest fork: the full job versus the $50-$150 bypass that seals the system at the cost of cabin heat.

"They said head gasket and my stomach dropped." → Source 8: the block test ($10-$100) comes before the verdict, in writing — and the head gasket guide owns the decision math after a positive.

"I've been topping off for a month — what's that actually costing me?" → The trap section's first entry: $15-$25 per jug, plus the compounding risk that converts this page's cheap tier into its expensive one. The refill is anesthesia, not medicine.

"European car — why is every number bigger?" → The by-vehicle table: plastic-heavy cooling systems, specialty coolant specs, and labor rates put Euro platforms 30-60% above every band here.

What actually determines your price

Geography — the master variable. Not the part ($20-$300 almost everywhere) but what's between it and the wrench: open-bay parts cost one labor hour; behind-the-belt parts cost a timing job; behind-the-dash parts cost 8-12 hours; behind-the-head parts cost the machine shop.

Whether you arrive with the source named. "The upper hose is cracked at the clamp" buys a quote; "it's leaking somewhere" buys a $60-$150 diagnostic plus open scope. The 15-minute inspection is the difference.

Bundling discipline. The belt with the pump, the thermostat with the housing, hoses and cap with the radiator — every skipped bundle is the same labor purchased twice, usually $150-$500+ of pure waste.

DIY viability. On the accessible tier, parts are $20-$150 and labor is most of the shop price — DIY saves $100-$450. On the buried tier, the labor is the product; buy it.

The flush line. Old coolant can't be reused, so $80-$150 for flush-and-refill is a legitimate line on most estimates — with the spec named (OAT, HOAT, IAT), because "universal" coolant in the wrong system gels into the next leak.

Platform tax. European and luxury: plastic expansion tanks, housings, and pipes as known service items, pricier parts, higher rates — 30-60% over every band on this page.

The price ladder: every rung, 2026 numbers

Read the ladder as geography tiers: green rungs sit in the open (parts money plus an hour), yellow rungs hide behind moderate disassembly (labor starts to dominate), red rungs live behind the dashboard or the cylinder head (labor is the bill). The two test rungs — pressure and block — are the tolls that keep you from buying the wrong tier.

Your number, by what you drive

Two table rules: on any timing-belt engine, no pump gets authorized before the one-sentence question — "is my pump belt-driven, and what's the belt bundle versus the pump alone?"; and on any plastic-heavy platform past 100K, one plastic failure predicts its siblings — bundling the neighbors (tank, housing, pipes) onto already-open labor beats three separate visits at three separate labor charges.

Which source is yours? Answer five questions

Question 1: Coolant vanishing, no visible leak anywhere, gauge occasionally warm? → The cap first — $10-$40, two minutes, and it impersonates everything. Then the pressure test if the level keeps dropping.

Question 2: Crust or wetness at a hose end, the reservoir, or the housing seam? → The accessible tier — $100-$450, and the DIY math below decides whether a shop is even involved.

Question 3: Drip at the weep hole under the pump, or a rumble from the front of the engine? → The pump, $400-$800 — and the bundle question before anything is signed.

Question 4: Wet fins or cracked end tanks — or a shop already quoting a radiator? → $400-$900 — after the pressure test. Gravity smears every upstream leak onto the radiator's face; the test keeps you from buying the wrong part.

Question 5: Sweet smell inside the cabin, or white smoke / milky oil? → The buried tier. Heater core ($800-$1,300, or the bypass) for the cabin symptoms; the block test before any head-gasket number for the internal ones.

Every source, priced: parts vs labor vs DIY

The comparison's lesson in one line: DIY earns its savings exactly where the part is visible and the labor is simple — and stops earning the moment geography enters. The green tier is a screwdriver afternoon; the red tier is where a mistake costs more than the shop would have.

How much does fixing a coolant leak actually cost? Read the number as geography, not parts. The accessible tier — cap $10-$40, reservoir $100-$250, hose $150-$350 — is parts money plus an open-bay hour, where DIY saves $100-$270 with beginner tools. The middle tier — housing $200-$450, pump $400-$800, radiator $400-$900 — is where labor overtakes parts, and where the two money questions live: the pressure test before any radiator, the belt bundle before any pump. The buried tier — heater core $800-$1,300, head gasket $1,500-$3,500 — is almost pure labor: a $50-$150 core behind 8-12 dashboard hours, a $50-$250 gasket behind the machine shop. On top: flush $80-$150, diagnostic $60-$150 (skippable via the inspection), and the 30-60% European surcharge. The national average sits near $275 because most leaks are caught accessible — every week of delay risks graduating tiers. Pulscar's reports pair the suspected source with these bands before any shop quotes theirs.

The five money lanes, in detail

Lane 1: The DIY tier — cap, hose, reservoir ($10-$350, save $100-$270)

The three sources where the shop price is mostly labor you can honestly do yourself. The cap ($10-$40): two minutes, and always the first try when coolant vanishes with no visible leak — a worn seal releases pressure and lets coolant boil off invisibly. The hose ($20-$60 part vs $150-$350 shop): drain below the hose, swap it with the clamps, refill with the named spec, bleed air per the manual — a 45-minute beginner job with a screwdriver and a drain pan. The reservoir ($20-$60 part vs $100-$250 shop): unclip, swap, refill. The one discipline across all three: coolant type matters — the wrong chemistry gels, and the diagnosis guide covers the spec families. What to say if you'd rather not DIY: "The [upper hose / reservoir / cap] is leaking — I've seen the crust. Quote that part specifically, no diagnostic needed."

Lane 2: The pressure-test tier — housing and radiator ($200-$900, test first)

The middle of the ladder, where the money question is certainty. The thermostat housing ($200-$450) and radiator ($400-$900) both announce themselves with crust and drips — but gravity and airflow smear every upstream leak toward the radiator's face, which is how healthy radiators get sold. The sequence: pressure test ($60-$150, credited if they do the work — ask), escape point named, then the quote. The bundles on this labor: the $15 thermostat with the housing; hoses and cap with the radiator (usually under $200 more, three future failures retired); a flush with any radiator (old coolant corrodes new aluminum). What to say: "Pressure test first and show me the escape point. If it's the radiator, quote it with hoses, cap, and flush bundled — itemized."

Lane 3: The bundle tier — the water pump ($400-$800, and the $500 question)

The pump's part cost is $50-$200; the price is the journey. On engines where the timing belt drives the pump (many Honda, Toyota, Subaru, VW designs), reaching the pump is a timing-belt job — 3-5 hours of labor that the belt replacement needs too. Bundled, that labor is paid once; separately, twice — typically $500+ of pure waste, the single biggest avoidable overpay in this niche. The bundle goes both directions: a pump quote on a belt-driven engine triggers the belt question, and a belt job at interval triggers the pump question (a $50-$200 part pre-emptively replaced on free labor beats a $700 return visit). What to say: "Is my pump belt-driven? Quote the pump alone and the pump-plus-belt bundle — itemized — and tell me when the belt was last done if you can see it."

Can you skip the diagnostic fee — and when shouldn't you? The fee is $60-$150 for a pressure test, and it's skippable exactly as often as the leak is visible: the 15-minute circuit (puddle, hose ends, end tanks, weep hole, reservoir seams, cap seal, cabin smell) finds the obvious majority, and a $15-$30 UV dye kit extends your reach to the seeps — the same method shops use, minus the invoice. Arriving with the source named converts the visit from paid search to free quote. When the fee is worth paying: coolant vanishing with no trace after your inspection — precisely the leak a pressure test exists for; $60-$150 naming it beats $400-$900 guessing. Two disciplines: ask "is the diagnostic credited toward the repair?" before authorizing, and never let it expand into an open-ended hunt — one test, one deliverable, the named escape point. Pulscar's free sound match covers the acoustic half — the pump bearing announces itself before the drip does.

Lane 4: The buried tier — the heater core ($800-$1,300, or the $150 fork)

The purest geography lesson on the page: a $50-$150 part priced at $800-$1,300 because it lives behind the entire dashboard — 8-12 hours of disassembly on most vehicles, more on minivans with rear heat. The symptoms are indoor (sweet smell from vents, greasy window film, damp passenger carpet), and so is the leak — which also makes it an air-quality problem: glycol vapor through the vents isn't something to nurse for months. The honest fork: the bypass ($50-$150) connects the core's two hoses together, sealing the cooling system permanently at the cost of cabin heat — a legitimate choice on an aging car in a mild climate, and a question worth asking even if you choose the full job, because a shop's willingness to offer it tells you about the shop. What to say: "Quote both: the core replacement, and the bypass. And if we do the full job — what else behind that dashboard is worth touching while it's open?"

Lane 5: The verdict tier — the head gasket ($1,500-$3,500, chemistry first)

The number nobody wants, and the one with the strictest purchase discipline. The gasket itself is $50-$250; the bill is the cylinder head coming off, the machine shop truing it flat ($150-$600 as its own line), and the reassembly — which is why every legitimate estimate itemizes machining rather than burying it. The non-negotiable sequence: the block test ($10-$50 DIY kit, $100 shop) chemically confirms combustion gases in the coolant before the verdict is bought — because white smoke, overheating, and coolant loss all have cheaper impostors, and the mirror risk is real too (a genuine gasket dismissed as "probably fine" until the hydrolock). A positive test hands the decision to the head gasket guide: the fair band ($2,475-$3,246 RepairPal average), the Subaru MLS note, and the three-number fix-vs-value worksheet for aging cars. What to say: "Block test result in writing before we discuss the gasket. If positive: quote with machining as a separate line, and give me the intake-manifold-gasket alternative if the test pattern allows it ($400-$900 — same symptoms sometimes, much happier answer)."

Which coolant repairs are genuinely DIY? Draw the line with geography, not courage. Firmly yes: the cap (two minutes), hoses (a screwdriver, a drain pan, the correct coolant, 45 minutes), the reservoir (unclip and swap) — parts $10-$60, shop premium $80-$270, and a mistake costs a redo, not a disaster. Conditionally yes: the housing and the radiator, for hands that have bled a system before — savings run $150-$450, and the skill that matters is air-bleeding (an air pocket overheats an engine as surely as a leak). Firmly no: belt-driven pumps (a timing mistake is engine-fatal), heater cores (the dashboard), head gaskets (the machine shop) — there the labor is the product, and the honest DIY contribution is the $10-$50 block-test kit run before any shop is called. One universal rule: the refill uses the named spec, bled properly — perfect parts with trapped air is next month's overheat. Pulscar's reports flag your tier before you buy anything.

What a fair estimate looks like, line by line

The diagnostic line ($0-$150). Absent if you named the source; credited if they found it and you're authorizing the work — the crediting question asked before, answered on paper.

The part line. The component at 2026 parts pricing ($20-$400 for everything except luxury radiators) — and on plastic parts past 100K, the neighbor question: "what else plastic is on this same labor?"

The labor line. Matched to real geography: an hour for open-bay parts, 2-4 for radiators, the belt-job block for buried pumps, 8-12 for heater cores. Labor wildly out of proportion to the geography is the tell.

The flush line ($80-$150). Legitimate on nearly every repair — old coolant doesn't go back in — with the spec named. "Universal coolant" as a line item is a small red flag on chemistry-specific systems.

The bundle lines. Thermostat with housing, belt with pump, hoses-and-cap with radiator — present on a good estimate, itemized so you can see the shared-labor discount working. Their absence on a geography job is money leaking off your side of the table.

The traps: three plays, dissected

Trap one: the top-off economy. The situation: a jug of coolant is $15-$25, the leak is "small," and the weekly refill feels like thrifty maintenance compared to a repair bill. What's real: the arithmetic inverts fast. Three months of refills is $60-$150 in coolant alone — approaching the price of the hose that's leaking — while the actual exposure compounds in the background: every heat cycle widens the crack, and the failure mode is an overheat that warps a head, graduating a $150-$350 repair into the $1,500-$3,500 tier. The refill money buys nothing but delay, and the delay is the expensive part. The price: the full gap between this page's green tier and its red one, purchased $20 at a time. The defense: the second top-off in a month triggers the 15-minute inspection; the third triggers the pressure test. Coolant loss is a symptom with a source, and the source is never cheaper than today.

Trap two: the unbundled pump. The situation: a water pump quote on a timing-belt engine — $650, say — with no mention of the belt; or its mirror, a belt job done six months ago and now a pump quote that re-bills the same 3-5 hours. What's real: on belt-driven designs, the pump and belt share almost all of their labor. Quoting them separately isn't necessarily malicious — shops quote what's asked — but paying for that labor twice is $500+ of pure waste that one sentence prevents. The bundle discipline runs both directions: pump due → belt question; belt due → pump question ($50-$200 of part on free labor versus a $700 return visit). The price: $400-$700 of repeated labor. The defense: "Is my pump belt-driven? Itemize the pump alone versus the pump-plus-belt bundle." On a belt engine, an estimate without that comparison is incomplete by definition.

Trap three: the stop-leak "repair." The situation: a $10-$25 bottle promises to seal the leak for one-fiftieth of the repair quote — sometimes from a parts counter, occasionally as a line on an actual estimate. What's real: stop-leak hardens at small openings, and it can't distinguish a leak from a legitimate narrow passage — the heater core's fine channels and the radiator's tubes clog on exactly the same mechanism. The exchange rate is brutal: a $15 bottle avoiding a $150-$350 hose can create an $800-$1,300 heater-core job, and the contaminated system complicates every future repair. The two honest frames: a limp-home emergency from somewhere remote, or a last-season car being consciously run out. The price: an $800+ problem manufactured from a $15 solution — plus the original leak, still there. The defense: on any car worth keeping, the named part gets fixed at its real price — and a shop that proposes stop-leak as a repair line has told you which kind of shop it is.

Three real estimates, decoded

Estimate 1: the $15 cap that ended a ghost hunt. Coolant dropping for weeks, no puddle, no crust anywhere, temperature running slightly warm — an owner braced for internal-leak money. The 15-minute inspection's last stop: the cap's rubber seal, visibly cracked. $15, two minutes, level stable ever since — the worn seal had been releasing pressure and letting coolant boil off invisibly. Lesson: when coolant vanishes with no visible leak, the cap is always the first $15 spent — it impersonates every expensive answer on this page, and it's the only one you can rule out in the parts-store parking lot.

Estimate 2: the $220 hose versus the $25 afternoon. An 8-year-old sedan, 95K, puddle at the front, and the upper hose visibly cracked at its clamp — found in step two of the self-inspection. Shop quote: $220 (fair, per this page's band). DIY route taken instead: a $25 hose, a screwdriver, a drain pan, a jug of the named spec, and 45 minutes. Lesson: the accessible tier is where DIY genuinely pays — $195 saved on a beginner job — and where even choosing the shop, arriving with the source named skipped the $60-$150 diagnostic entirely. Either way, the inspection paid for the afternoon.

Estimate 3: the bundle that saved $460. Weep-hole drip on a Subaru at 98K — pump quote alone: $650. The one-sentence question revealed the timing belt was due at 105K anyway; the bundle quote: $890 for pump, belt, tensioners, and fresh coolant on shared labor. The unbundled path — $650 now, $700 for the belt in seven thousand miles — would have totaled $1,350. Lesson: on belt-driven engines, the pump and belt are one job wearing two names. The $460 saved wasn't negotiated — it was unlocked by asking how the geography overlaps, which is the whole art of cooling-system money.

Your situation right now: four playbooks

"I'm holding a quote." Benchmark it against the ladder and your source's lane; check the five estimate lines (diagnostic credited? bundles present? machining itemized on gaskets? spec named on the flush?); and if it's a radiator or gasket number, confirm the test that justifies it exists in writing. Off-band or test-free: a second opinion at an independent costs $60-$150 and routinely pays for itself.

"I want to DIY whatever's DIY-able." The line is geography: cap, hose, reservoir — yes, with the named spec and proper bleeding; housing and radiator — if you've bled a system before; anything behind a belt, dash, or head — the labor is the product. The diagnosis guide has the self-checks that confirm your target before parts are ordered.

"The shop found it and wants to proceed." Three sentences before yes: "Is the diagnostic credited toward the repair?" — "What else lives on this same labor?" (the bundle harvest) — and, on any four-figure line, "show me the test that names this part." Then the fair band from this page sits next to their number, and the conversation is short either way.

"I can't afford the repair this month." Triage honestly by tier: a cap or hose is $10-$350 and shouldn't wait (the escalation risk dwarfs the cost); a heater core can wait briefly via the $50-$150 bypass without nursing glycol vapor; a confirmed head gasket parks the car — driving it is the one option that makes every number worse. And the dispute guide covers the case where the bill you're struggling with shouldn't have been this size at all.

After the repair: keep the money in the system

Verify like a shop should: re-pressure-test after the work, recheck the level after 2-3 heat cycles — new joints announce mistakes early, inside the labor warranty. Flush on the real schedule: old coolant turns acidic and corrodes from inside; the $80-$150 flush at the manual's interval is the cheapest leak-prevention sold, and the cap rides along free. Squeeze the hoses at every oil change: spongy, rock-hard, or cracked gets replaced at $150-$350 before it strands you — the whole cost logic of this page rewards the early move. Harvest geography whenever labor is open: any job that opens the front of the engine or drains the system is a chance to retire the $15-$60 neighbors (thermostat, cap, hoses) at parts-only prices. And keep the monthly 30 seconds: level against the cold line, dipstick color — the two checks that catch the next leak while it's still in the green tier.

Your action plan: next 10 minutes, today, this week

Next 10 minutes (free):

1. The 15-minute inspection (it fits): puddle, hose ends, end tanks, weep hole, reservoir seams, cap seal, cabin sniff.
2. Coolant vanishing with nothing visible → the $10-$40 cap is the first purchase, not the pressure test.
3. Any internal symptom (milky oil, white smoke) → the diagnosis guide's safety protocol now; this page's numbers after.

Today: 4. Source found → your lane's fair band noted, the bundle question drafted, and either the DIY parts list or the "quote that part specifically" call made. 5. Source not found → pressure test booked with the crediting question asked up front; UV dye kit ($15-$30) if you'd rather extend the DIY hunt first. 6. Any odd sound with the leak — rumble, gurgle, hiss — recorded: the pump bearing testifies acoustically before it drips expensively.

This week: 7. The repair, with its geography harvested: thermostat with housing, belt with pump, hoses-and-cap with radiator — itemized so the shared labor shows. 8. Any gasket conversation: block test in writing before the verdict, machining as its own line after it, and the head gasket guide's worksheet if the number is real. 9. The estimate benchmarked, the flush spec named, the level rechecked after three heat cycles — and the monthly 30-second habit calendared.

For finding the leak: the coolant leak diagnosis guide (the companion to this page), overheating and its causes, and white smoke decoded. For the big verdicts: head gasket costs and timing belt bundles. For the money side: what diagnostics should cost, oil leak pricing (the parallel page), dealer vs independent math, overcharging tells, and disputing a bill that got away. And our story explains why Pulscar exists.

How these numbers were built: cross-checked against 2026 estimator and shop-survey data (radiator caps $10-$40; coolant reservoirs $100-$250 installed with parts at $20-$60; hoses and clamps $150-$350 with parts $20-$60; thermostat housings $200-$450; water pumps $400-$800 with parts $50-$200 and timing-belt bundles sharing 3-5 labor hours; radiators $400-$900 installed with parts $150-$400; heater cores $800-$1,300 against a $50-$150 part and 8-12 labor hours, bypass $50-$150; intake manifold gaskets $400-$900; head gaskets $1,500-$3,500 with machining $150-$600 itemized separately; pressure tests $60-$150; block tests $10-$50 DIY / $100 shop; UV dye kits $15-$30; coolant flushes $80-$150; tows $100-$200), at 2026 labor rates of $120-$159/hr independent, with European and luxury platforms running 30-60% above these bands. Assumes the source is named by inspection or pressure test before parts are authorized, and by block test before any internal-leak verdict. Prices reviewed quarterly — last verified July 2026.

Holding an estimate with an unbundled pump, an untested radiator, or a stop-leak line? Email [email protected] with the itemization and we'll tell you which questions it still owes you.