Part explained
Cylinder head gasket replacement: price, symptoms, labour
The head gasket itself often costs under € 100. The invoice that follows hurts: 8 to 15 hours of labour, a flatness check on the cylinder head, often a new timing kit and cooling-system service. This page explains how to tell the typical symptoms (coolant in oil, oil in coolant, white smoke, overheating) apart from other cooling-system faults, and why this is one of the heaviest workshop jobs there is.
By the onderdelen.autos editorial team · Updated · About the editorial team
What does the head gasket do?
The head gasket sits between the engine block and the cylinder head. It seals three separate circuits that must never cross: the combustion chambers (very high pressure and temperature), the coolant gallery and the oil gallery. A multi-layer steel plate with sealing rings around each cylinder and each port. Failures come from overheating, head warping (often after an earlier overheat) or natural wear at high mileage — particularly on engines historically prone to head-gasket issues (certain 1.4 TSI, some PSA HDi blocks, older Range Rover V8).
Symptoms — learn to tell them apart
- White, mayonnaise-like residue on the oil filler cap or dipstick (coolant in the oil).
- Coolant level drops without a visible leak on the ground.
- White, sweet-smelling exhaust smoke — especially with a warm engine under load.
- Bubbles in the expansion tank with the engine running (combustion gases in coolant).
- Rapid overheating: gauge climbs within 5 – 10 minutes.
- Oil in the coolant (brown foam on top of the expansion tank).
- Hard starting with a puff of white smoke in the first 30 seconds.
When to replace?
There is no preventive interval — you replace once a test (CO₂ measurement in the coolant, compression test or a ten-kilometre dipstick check) confirms what the symptoms suggest. Important: don’t keep driving on a suspicion. Coolant in the cylinders destroys the bearings, piston rings and possibly the head itself in a matter of weeks — at which point you are looking at an engine swap. A weeping external leak (no circuit crossover) usually buys you a few weeks to the workshop, but schedule it.
What it costs — and why labour is the real story
The head gasket itself: € 30 – € 100. A full head-gasket set (with all supporting gaskets and seals): € 80 – € 250. The price is misleadingly low because the real cost driver is labour. The head has to come off completely: intake manifold, exhaust manifold, timing, valve cover, the lot. Then the head goes to a machine shop for a flatness check — a head that warped from overheating must be skimmed (€ 80 – € 200) or, in extreme cases, replaced. On top of that you usually renew the timing kit (logical — it’s already off), coolant and engine oil. Budget 8 to 15 hours of labour + part + machine-shop work: total indicatively **€ 800 – € 2000+** at a workshop. For some diesels or engines with poor access this can climb to € 2500 or more.
| Condition | From | To |
|---|---|---|
| New | € 30 | € 100 |
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DIY?
Difficulty:
Honest advice: workshop. Replacing a head gasket is not just a lot of work — every step has to be precise. Head bolts are usually Torque-to-Yield (single-use, mandatory replacement, tighten in a specific sequence and angle). The head must go to a machine shop for flatness and, if needed, a skim. Timing has to be perfect. Even experienced amateurs hit unexpected details — a seized exhaust bolt, a stripped block thread, a sensor not included in the kit. For most owners: have the workshop do the whole job and ask for an itemised quote.
- Workshop manual with tightening sequence and torque values — non-negotiable
- Wide-range torque wrench plus an angle gauge (Torque-to-Yield bolts)
- Engine-specific timing lock tools
- Access to a machine shop for the flatness check on the cylinder head
- A clean workspace — a single grain of grit in a cylinder is fatal
Frequently asked questions
Why is it so expensive when the gasket only costs € 50?
Because labour is the real story. 8 – 15 hours of removal and refit, plus a flatness check at a machine shop, plus often a new timing kit (already off anyway) and fresh coolant. The gasket is a fraction of the final bill.
How do I know for sure it’s the head gasket?
Three tests: (1) a CO₂ measurement in the coolant — detects combustion gases; (2) a compression test or a cylinder leak-down test — identifies compression loss; (3) check for mayonnaise on the oil cap / film in the expansion tank. One symptom alone can also point at another cooling-system issue (water pump, thermostat, radiator or coolant hose).
Can I keep driving until I have the money?
No. Coolant in the cylinders wipes out bearings and rings in weeks — at which point it’s an engine swap rather than a head gasket. A weeping external leak without circuit crossover may buy a few more weeks, but every overheating event makes it worse.
Is the head always skimmed?
Not always. A flatness check at the machine shop is mandatory — a blown gasket often comes with a slightly warped head, and an unmachined head should not go back on. Skimming is a separate line item (€ 80 – € 200) if it turns out to be needed.
Is it smarter to buy a used engine?
At higher mileage or on engines with more internal damage (bearings already chewed, rings glazed), yes. For a € 4000 car with a € 2000 head-gasket repair, a used engine from a Dutch dismantler with 80,000 km and warranty can be the smarter call. Always compare both quotes.
Related parts
Head gaskets from Dutch stock
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