Head gasket replacement

Fix overheating and coolant loss from a failed head gasket.

Typically £351 – £506 depending on your car · 1–2 days

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Free, instant and no obligation. You won't be charged until the work is done.

About this job

A blown head gasket lets coolant, oil and combustion gases mix. The mechanic confirms the fault with a combustion leak test, removes the cylinder head, has it checked flat and refits it with a new gasket and bolts.

Signs you might need it

  • White smoke from the exhaust
  • Coolant disappearing with no leak
  • Overheating
  • Mayonnaise-like residue under the oil cap

What's included

  • Combustion leak test
  • Head gasket set and head bolts
  • Head flatness check
  • Coolant and oil refill

Plus travel, disposal of old parts and a 12-month guarantee.

Typical prices by car size

Small car (e.g. city car, supermini)£351
Medium car (e.g. family hatchback, saloon)£389
Large car / SUV / MPV£448
Premium or performance car£506
Small van / pickup£467

Head gasket replacement prices for popular cars

Questions about head gasket replacement

How long does head gasket replacement take?

Usually 1–2 days. Your mechanic will tell you if your car needs longer.

Can it be done at my home?

In most cases, yes. Mobile mechanics need a safe, level place to park, such as a driveway or quiet street. If your job needs a workshop we'll let you know before you pay anything.

Is the price fixed?

Yes. The price on your quote is what you pay. If the mechanic finds something else, they'll explain it and give you a separate price – nothing extra is done without your OK.

Is the work guaranteed?

Yes – parts and labour are covered for 12 months. See our guarantee page for the details.

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