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Serious warning about the 2.7 diesel engine.

 
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Old 01-31-2011, 09:01 AM
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Default Serious warning about the 2.7 diesel engine.

This will apply to only a few here as there aren't many diesel owners on this site.

If you find when checking the engine oil regularly as you should, that the level on the dipstick seems to be RISING contrary to logic, be very cautious about driving it until you've made some checks.

The DPF/diesel particulate filter sytem together with the EGR/exhaust gas recycling system can be operating in a dangerous mode. Very short journeys where the automatic DPF regeneration system is never allowed to fully regenerate and get the exhaust to 600*C (and therefore repetitive attempts by the ECU to do so) may produce pooling of diesel fuel in the inlet areas, esp the intercooler and around the turbos. Far too much diesel is injected under these conditions which washes down the cylinder walls in to the engine sump, hence the rising level of oil on the dipstick. There will be stored ercos in the ECU memory.

Under conditions like this, a high speed run may result in the car accelerating uncontrollably, which cannot be stopped even by switching off the engine. The engine starts to consume its own engine oil as a kind of fuel. It continues to rev. at the valvebounce limit until it destroys itself, and uses all the engine oil. The only way to stop a manual box version is to stall the engine in top gear plus force braking. The automatic version cannot be stopped at all.

These circumstances have been known in the Renault megane 1.5dCi and other models using that engine. It was caused by a faulty EGR valve. This also caused turbo bearing failure in some cases, and if the valve wasn't replaced, the new turbo would also fail after a few miles.

So if you have a diesel Jag., check the engine oil level on the dipstick frequently, especially if you do many short runs.

Leedsman.
 
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Old 01-31-2011, 09:54 AM
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I have read about this syndrome, which is found in Europe where there are now so many diesel cars running around. Indeed it was in the Honest John column in motoring section of the the Saturday Daily Telegraph newspaper I read it.
Only thing I am not clear about is this; how does the oil get into the combustion chamber ? I thought there had to be a worn-out oil seal in the turbocharger as well to allow the diesel-diluted oil into the inlet manifold.
 
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Old 12-22-2012, 05:03 PM
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The DPF won't even attempt to regen unless the engine is up to temp and numerous others parameters are met.When servicing simply don't fill the oil beyond half way between the min and max to allow for oil dilution.Oil dilution and DPF regen is covered in Jags mechanics manual and quoted on the UK forum many times.If the engine doesn't do long enough journeys eventually the DPF will fill to around 70% of capacity at which point an amber warning'DPF Full--see handbook' alert will appear on the dash. All that is then required is a short run at at least 48kmh for up to 20 mins to clear the alert. If the run isn't carried out eventually the alert will turn from amber to red which will then require a forced regen either with Mongoose software (dealer level software costs 50 from uobdii.com) or at a dealer/specialist).
I do very short journeys daily and in nearly 4 yrs of ownership have had the amber alert once which cleared within 5 mins once at 48kmh.
 
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Old 05-10-2015, 01:59 PM
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Hi, 2.7 diesel, has anybody got the details for head gasket thickness on these engines, I have seen the detail using DTI, but cannot remember where, not in the manual.

it gives the thickness of the gasket against the protrusion of the piston out of the block.

Many thanks
 
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Old 05-11-2015, 06:00 PM
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Originally Posted by Leedsman View Post
may produce pooling of diesel fuel in the inlet areas, esp the intercooler and around the turbos.

Leedsman.
Really? since diesel is injected directly into the cylinders how does it get into the 'inlet areas, esp the intercooler and around the turbos'
 
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Old 05-12-2015, 02:32 AM
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After an engine scare he sold his car and left the site years ago...
 
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Old 05-16-2015, 08:48 AM
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Mine is an early diesel, so I do not think it has the DPF. My understanding is that if the exhaust tips point down there is not DPF.
 
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Old 08-31-2016, 01:50 AM
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Default Particulate filter

I have a 2007 diesel S-type but had the particulate filter removed immediately after buying in 2007 as it affects economy. I also had the car chipped for more bhp. Yes know its illegal but no MOT garage is going to cut open your exhaust to check. My emissions are low as I use top grade diesel and my mpg never drops under 30 mpg. For me this car is one of the best cars I have owned.
 
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Old 09-01-2016, 01:30 AM
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They won't be low: your PM and NOx will be bad.

Just the CO2 will be fairly low but then it would be as good or better if you had not broken the law.

The PM and NOx from diesels are why our cities have terrible air pollution, in many cases beyond the limits set.

It can only be a matter of time before PM and NOx tests are added to the MoT and you can expect your car will then fail.
 
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Old 09-20-2016, 01:59 PM
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Default Jaguar XJ 2.7 Diesel TVi 2007

Originally Posted by Ricky302 View Post
Really? since diesel is injected directly into the cylinders how does it get into the 'inlet areas, esp the intercooler and around the turbos'
Amber warning light " Restricted Performance " As a new owner could someone
enlighten me ? Could be as simple as I`ve pressed a wrong button !! ie Cruise control !

Delighted with this car only 22,000 on the clock. One owner from new !
 
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Old 09-24-2016, 05:25 AM
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Not going to be a button press. It's got a fault. No US/Canada owners as diesel not sold there - try UK forum.
 
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Old 07-08-2018, 01:21 PM
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Default aron

hi i got jaguar XF LUXURY V6 2.7d i was driving at motorway and i heard a noise from the engine and lost half of the power the car drive but noise come from engine i stopt and got little lake oile and smoke i ask some one and told me engine is broke . on dashboard not showing nothing wrong with engine .do u think is the tube of the turbo?
 
 
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