Head Gasket Replacement Cost: Shop Prices by Model

What drives head gasket replacement cost

Head gasket replacement cost is one of the most lopsided bills in auto repair, because the part barely matters. CRC puts the gasket and related parts at $100 to $500. Everything else is labor: the same source puts the job at 6 to 12 hours at shop rates of $75 to $200 per hour. RepairPal puts the national average for the finished job at $2,543 to $3,337. AutoZone gives a wider range of $1,000 to $4,000 or more, and Car Talk puts it at $2,000 to $6,000.

The spread comes from three things. First, engine layout: a four cylinder with a single head is a far shorter job than a V6 or V8 where two heads have to come off. Second, machine shop work: once the cylinder head is off, it gets checked for warping, and a resurface or a cracked head turns one repair into two. Third, collateral damage. A head gasket usually fails because the engine overheated, so the shop is often quoting a cooling system repair at the same time. If the pump is the reason the engine cooked itself, the water pump replacement gets added to the same invoice.

Note how the trucks sit at the bottom. On the Ram 1500, RepairPal splits the job into $752 to $1,104 of labor against $1,019 to $1,079 of parts, which is the opposite balance from most cars on the list. Older, simpler engines with easy access cost less to take apart even when the parts bill is higher.

Costs that get added to the quote

• Machine shop work on the cylinder head: resurfacing a warped head is routine after an overheat. A cracked head has to be replaced, which is a separate part and a separate bill.
• Cooling system repairs: the thermostat, hoses and radiator are often what caused the failure. Car Talk notes that owners who add timing belt, thermostat, spark plug and fuel pump work while the engine is open push the total toward $4,000.
• Timing components: on a timing belt engine the belt comes off anyway, so replacing it now costs only the part. Our timing belt replacement cost guide covers that job on its own.
• Fluids: coolant and an oil change are standard after the repair, since both get contaminated when a gasket fails.
• Diagnosis: a block test or compression test confirms the gasket before anything comes apart. Expect a diagnostic fee if the shop does not fold it into the repair.

Sealer, repair or replace the car

Bottle sealers exist and cost around $50 according to CRC, its own product category. They can slow a small leak and buy time, but they do not fix a failed gasket, and a shop will tell you the same. Treat one as a way to get the car to the repair, not as the repair.

The harder question is whether the car is worth it. K-Seal notes that on lower value vehicles some mechanics suggest scrapping rather than repairing. That is the honest math: a $3,000 repair on a car worth $4,000 rarely makes sense unless the rest of the vehicle is sound. Car Talk reports owners weighing a rebuilt engine instead, which can be the better value once the head is already off and the machine shop finds more damage.

Is your quote reasonable?

For a mainstream four cylinder sedan, $1,800 to $3,000 is a normal independent shop quote. Car Talk polled a Subaru owners group and found that consensus exactly, with a real member quote of $1,979 from a dealer. A V6, a V8 or a European engine reasonably lands at $3,000 to $4,500, and a dealer quote on a late model vehicle can legitimately pass $5,000 once machine work and cooling parts are included.

Below about $1,200 from a shop, ask what is being left out. A quote that low usually assumes the head needs no machine work, which cannot be known until it is off. Ask for the estimate in two parts: the base job, and a named allowance for resurfacing and any cooling system parts. Above $4,500 on an ordinary car, ask for the labor hours in writing and check them against the 6 to 12 hour range, and ask whether the price includes a new cylinder head rather than a resurfaced one. One more question worth asking: why did it fail. If nobody can tell you, the replacement gasket is likely to meet the same fate.