Thread: Disco 3 2.7TD Piston Meltdown

TD5 ecms provide cylinder balance diagnostic info which to the experienced operator can be used to identify poor injectors even though the injectors are still within spec and therefore don't cause fault codes to be logged. I suspect the TDV6 ecms would also provide such info as diesel cylinder balancing has been in use by various engine manufacturers for many years.

Originally Posted by Dougal

When it's automatic, how do you drive it differently? You've got a go pedal and a stop pedal.

Diesels don't suffer detonation.

Foot to the floor Dougal, driving it off the exhaust temp scale and last time I looked, a gaping hole where a piston crown should be is an engine that's detonated, blown, burnt, fryed, ****ed or what ever else you want to call it.

You also have a clutch pedal and gears and ironically you just embodied exactly my point. But that's OK as that's the driver mentality that used to pay my wages from said failures.


Using Capitals, the difference between helping your Uncle Jack off a horse or helping your uncle jack off a horse...

If an engine is properly tuned, it's not possible to blow it up by keeping your foot down. Modern diesels monitor airflow and set fuelling to match, it's only when air leaks occur or sensors pack up that the ECU loses control and temperatures can get out of hand.

Diesels can't detonate, it's a phenonmenon only found in petrols. Diesels can only overfuel and melt pistons. The results can be similar, but the cause is quite different.

They do if you add gas lol

Originally Posted by lambrover

They do if you add gas lol

I'm trying not to respond,I'm tryyying Pat

With these common rail engines, an electronic or mechanical fault with an injector could conceivably keep allowing fuel at full injection pressures to enter the cylinder for complete cycles, causing huge overheating and melting the piston top like described within a few seconds. i have seen this exact problem with a TdV6 before, all other cylinders were fine bar one so that seemed the most likely cause of failure. The complete engine was shipped back to the motherland for diagnosis and a new one fitted under warranty.

No problems since.

Thats the diagnosis I am most happy with.

JC

Yeah JC I reckon it could be a dribbling injector or staying open

Pat303, that is just funny