Nissan Juke head gasket cost
fitted at an independent garage · gasket set, new head bolts, skim, fluids and labour included
- Diagnosis first £50–£100
- Typical time 7–10 h
- Dealer +50%
A Nissan Juke head gasket costs £580–£1,050 fitted at an independent garage, with diagnosis at £50–£100 and 7–10 hours of labour. There is a second bill most owners never hear about until it arrives, and it is the reason this repair should not be postponed: coolant leaking into the cylinders does not stay in the engine. It goes out through the exhaust, and the catalytic converter and oxygen sensors in its path are chemically damaged by it. Fix the gasket in time and that bill never exists. Compare against every model here.
Juke head gasket costs by job
| Job | What it involves | Fitted cost (independent) |
|---|---|---|
| Diagnosis first | Block test for combustion gas in the coolant, plus a cooling-system pressure test and a scan for stored emissions codes | £50 – £100 |
| Head gasket replacement | Full head set, new single-use stretch bolts, machine-shop pressure test and skim, fresh coolant and oil | £580 – £1,050 |
| With a condemned head | When the head will not skim true or the pressure test finds a crack | Add £300 – £800 |
| Main dealer | The identical job at franchise labour rates | About 50% more |
Ranges match our head gasket cost guide row for the Juke. Estimates assume the head skims within tolerance and cover the engine only — exhaust damage is priced separately.
Why waiting adds a catalytic converter to the bill
Coolant is destructive to a catalytic converter. When a gasket lets coolant into a cylinder, it is burned along with the fuel and carried out of the exhaust port. Inside the converter it coats the honeycomb that does the actual work, and once that surface is coated it cannot treat the gases passing over it. This is chemical poisoning rather than mechanical damage: there is nothing to hear, nothing to see, and no warning until the engine management light appears. The same contamination coats the oxygen sensors either side of the converter, so the readings the engine relies on start to drift too.
It is a slow accumulation, which is exactly what makes it dangerous. A small breach that produces no smoke and no overheating can still be sending a little coolant through the exhaust on every journey. Six months of driving on a fault that “does not seem to be getting worse” is six months of coating that surface. This is the honest reason the main guide insists on early diagnosis, and on a Juke it is the most concrete version of it: the gasket bill stays roughly the same whether you act now or in spring, but what sits behind the engine may not.
So the order of repairs is not negotiable. Never replace a catalytic converter while the engine is still putting coolant into the exhaust — the new one will be poisoned the same way, and there is no warranty in the country that covers that. The engine is repaired first, then the exhaust is assessed. Our catalytic converter guide prices that side of the job and explains the diagnostic ladder behind the code most owners meet first.
The code that appears after the repair is finished
Here is the sequence that catches Juke owners out. The gasket is replaced, the car runs beautifully, and a few hundred miles later the engine management light comes on with a converter efficiency code. It feels like the garage has caused it. It has not. The car’s own diagnostics compare the readings before and after the converter to judge whether it is still working — while the engine was misbehaving, that comparison was unreliable, and now that everything else is correct the system can finally see that the converter is not doing its job.
That is a difficult conversation to have after the fact, which is why the question worth asking before the work starts is: “has the car been scanned for stored emissions codes, and what do the sensor readings look like now?” A garage that scans first can tell you whether the converter was already struggling — and if it was, you can make one decision about the whole car instead of two decisions a month apart.
It also matters for the MOT. The gasket itself is not tested, but the emissions check is, and a poisoned converter can fail it on a car whose engine has just been repaired perfectly. If your test is close, that is worth knowing before you book the work rather than after — our MOT guide covers what the test actually measures.
Which Juke this applies to
The exhaust-damage story above is general to any engine burning coolant, but it bites hardest on the turbocharged petrols that dominate Juke ownership. Everything in the exhaust stream sits close together in a small, tightly packed engine bay, the turbine itself is in that stream, and the car’s typical duty cycle — short urban journeys, cold starts, stop-start traffic — is the one that gives contamination the most time to settle and the least chance to burn off.
On the diesel Juke the engine and its coolant behaviour are shared with the Qashqai, and the presentation is the same: pressure in the system and a slow loss with nothing on the ground. There is no point telling that story twice — it is set out in full on our Qashqai head gasket page, including why the temperature gauge is not the early warning owners assume it is.
One last note that applies to every version. The gasket is rarely the first thing to go wrong; something usually overheats the engine first. Whatever that was — a thermostat, a fan, a hose, a pump — has to appear on the same invoice, or the new gasket inherits the old one’s killer and the exhaust damage starts again from zero.
There is a practical way to keep the exhaust out of this story altogether. Treat any coolant top-up as an event rather than a chore: note the date, note how much went in, and if it happens twice inside a few months, book the test. The cost of being wrong about that is an hour of a garage’s time. The cost of being right about it eight months late is a converter, and possibly the sensors either side of it, on top of a repair you were always going to pay for.
Worked example — Juke 1.2 turbo petrol, head gasket, head skims true
Head set and new stretch bolts £160 · machine shop pressure test and skim £85 · labour 8 hours at £65 £520 · coolant, oil, filter and thermostat £75 · total ≈ £840 — inside the £580–£1,050 range above. This figure covers the engine only. A converter poisoned by months of coolant in the exhaust is a separate line, and the whole point of acting early is that it never gets written.
FAQ
How much does a Nissan Juke head gasket cost in the UK?
£580–£1,050 fitted at an independent garage, including the gasket set, new stretch bolts, a standard head skim and 7–10 hours of labour. Diagnosis costs £50–£100 first. A head that will not skim true adds £300–£800, and a main dealer charges roughly 50% more.
Can a blown head gasket damage the catalytic converter?
Yes. Coolant burned in the cylinders travels out through the exhaust and coats the converter’s internal surface, which stops it treating the gases passing over it. The same contamination affects the oxygen sensors. It is chemical poisoning rather than mechanical damage, so there is no noise or warning while it happens.
Should the catalytic converter be replaced before or after the head gasket?
Always after, and only if it is still faulty once the engine is right. Fitting a converter to an engine that is still putting coolant into the exhaust destroys the new part the same way as the old one, and no warranty covers that. Repair the engine, then assess the exhaust.
Why did an engine management light appear after my head gasket was repaired?
Often because the car can finally see a converter problem that was already there. The system judges the converter by comparing sensor readings either side of it, and while the engine was misbehaving that comparison was unreliable. The light is reporting old damage, not new damage.
Will my Juke pass the MOT after a head gasket repair?
The gasket itself is not tested, but emissions are — and a converter poisoned before the repair can still fail that check on an engine that is now perfect. If your test is close, it is worth scanning for emissions codes before booking the work rather than discovering the problem afterwards.
Does coolant in the exhaust damage the turbo as well?
The turbine sits directly in the exhaust stream, so it sees the same contamination as the converter, and on a small turbocharged engine that stream is short and hot. It is another reason the interval between noticing a coolant problem and acting on it matters more on this car than the price of the gasket does.
How long can I keep driving with a small coolant leak?
The honest answer is that every journey adds to what has to be repaired. A small internal leak may not overheat the engine for a long time, but it is coating the exhaust the whole while. A £50–£100 test settles what you are dealing with before the answer gets more expensive on its own.
Does the diesel Juke have the same head gasket story as the Qashqai?
Broadly yes — the coolant behaviour and the quiet presentation are shared, so the pressure in the system and the slow unexplained loss look the same on both. Our Qashqai head gasket page sets that out in full, including why the dashboard temperature gauge is not the early warning drivers assume.