Jaguar F Pace 2.0d low compression

[ollyh1988]

Car had been slow to crank so took it to local garage suspecting it might be battery or starter motor. No other issues - drives fine, has oil, serviced a month ago.

Garage called and said there is low compression in cylinder 1 - 100psi, compared to 280psi for the others. They don’t have the right tools to go any further diagnosing.

We have a warranty (Cinch car care) that actually has a comprehensive list of engine parts that it covers. The issue is they need the engine stripped to find the fault causing the low compression. Some garages won’t touch it as they said with the compression they’d be fitting a new engine and don’t want to strip an engine at huge cost to chase a problem. I understand why the warranty company want to see the cause (their money) but my worry is we do this, find the problem, only for them to not cover it anyway.

Just interested in advice or opinions.

I’m tempted to get a specialist to do a better diagnostic to see if they can narrow in on where the issue might be and see if the warranty company are happy enough with that (doubtful..?) or just cut my losses and list on eBay with the engine compression.

Thanks!

[normalbloke]

Is this the infamous ‘ingenium’ engine?

[ollyh1988]

Sadly yes…

Already spent close to 2k this year sorting the EGR. Hoping this is fixable but doubting it is going to be financially sensible.

[Rowe]

Failing using a borescope and identifying a cracked piston or similar, most places are not going to be able to definitively answer what is wrong with it without stripping.
If you're confident in the first garages diagnosis, surely now you should just be passing off to the warranty company to sort.

[finlo]

Whatever you do don't read the other F pace thread on here!

[stevemcs]

This is one of the reasons why we don't get involved with them. Your best option is to give Cinch a call and ask them if they have a list of approved repairers and then book it in with them.

[ollyh1988]

stevemcs said:

This is one of the reasons why we don't get involved with them. Your best option is to give Cinch a call and ask them if they have a list of approved repairers and then book it in with them.

Cinch are happy for it to go anywhere, even main dealer. But they won’t pay for it authorise a repair until the cause of the issue is found (ie. Crankshaft, piston crack etc). So it could be a huge job to find the issue. Also, worried they’ll see a cracked piston but want to know why it cracked and do more investigation before doing any repair. Not trying to be cynical about a warranty company but just trying to weigh up options.

I was hoping they’d see the result of the compression test and go ‘that needs a new engine’ and sorting it - but understand why they aren’t going to do that.

[stevemcs]

Replacing an engine is easy, determining why isn’t. We had it with the RAC and a Golf, they wanted to know why the belt had failed and the damage caused, until it was decided they wouldn’t agree to pay leaving the customer on the hook.

Ironically we have another golf in today with a failed cambelt but this was supplied by Cinch.

[Escy]

Seems like a catch 22. These warranty companies are a con.

It might be worth getting the injectors tested, cheap and easy to do and could be possible cause of low compression. As described here.

https://dieselheads.co.uk/our-engines/jaguar/jagua...

Let's say it is an injector, what happens then? I can't help feeling they pay for an injector and you pay for an engine?

It's interesting you mention EGR issues, I wouldn't be surprised if the current failure can be traced back to it.

[ollyh1988]

The garage it is booked into also mentioned injectors and that it should be fairly simple to see if this is the issue. It looks from the warranty paperwork that as long as it is a covered part that has failed and then caused the other issue (cylinder compression) then it ‘should’ be covered.
Not sure though how simple a fix that would be or if it’s still a case of needing another engine if too much damage has been caused by injectors to the cylinder.

I’ve been online and seen a few f pace for sale as ‘needs new engine’ so looks like others have had to make the same choice with this engine.

[ollyh1988]

Update to this:

Car went to engine specialist today for further diagnostic.

There is scoring inside cylinder 1 so suspect cylinder valve or seal. The fuel injector looked fine.

Now waiting for them to speak to the warranty company to work out what happens next. Either that is enough for them to agree to a repair / replacement engine (as cylinders are covered) or they will need to do more work to see what has actually failed. The mechanics won’t go further until the warranty company agree a way forwards, which is fair enough.

Not great news.

[Escy]

Was there a fault cope for the piston oil squirter?

[stevemcs]

Escy said:

Was there a fault cope for the piston oil squirter?

That comes up on nearly every JLR ingenium we scan

[ollyh1988]

Only fault codes were glow plugs, I believe.

Got to hope warranty company are happy that the cylinder is damaged so would warrant repair but risk is they will want to know what has caused this and necessitate an engine strip (at our cost) to find out what the cause was.

[Escy]

stevemcs said:

That comes up on nearly every JLR ingenium we scan

There's a mechanic on Tik Tok saying this fault code is the cause of low compression, if present when they do a DPF re-gen the pistons get too hot and expand in the bore, resulting in low compression.

It's a decent theory.

He's got a Velar in 28k on the clock, low compression and it had the piston squirter code. I need to stop watching his stuff, doesn't do my nerves much good.

[ollyh1988]

Claim now in with the warranty company along with a price for a reconditioned engine to be fitted (12k approx). I am crossing my fingers but still concerned they will want the engine stripped to work out exactly what caused the cylinder scoring.

[SystemOfAFrown]

Escy said:

There's a mechanic on Tik Tok saying this fault code is the cause of low compression, if present when they do a DPF re-gen the pistons get too hot and expand in the bore, resulting in low compression.

How does a piston expanding cause low compression, that makes absolutely no sense? The rings do the sealing, as they get hotter the ring gap decreases.

[GreenV8S]

SystemOfAFrown said:

How does a piston expanding cause low compression, that makes absolutely no sense? The rings do the sealing, as they get hotter the ring gap decreases.

I guessed this was about piston expansion causing ring/boredamage which increased leakage after it had cooled down.

[E-bmw]

GreenV8S said:

SystemOfAFrown said:

How does a piston expanding cause low compression, that makes absolutely no sense? The rings do the sealing, as they get hotter the ring gap decreases.

I guessed this was about piston expansion causing ring/boredamage which increased leakage after it had cooled down.

Not being an expert on these engines, I assumed the same.

[MrBig]

stevemcs said:

Escy said:

Was there a fault cope for the piston oil squirter?

That comes up on nearly every JLR ingenium we scan

How is that even a thing? Are they electronically controlled?!?