Technical Engine judder

[NEWBIEVANER]

HI Newbievaner here, just in the process of buying a fiat ducato 2.8 JTD hymer 614 c class gt motorhome and noticed the engine does a pronounced judder on being switched off, is this normal for a 35,000 mile engine ??

 

[bugsymike]

HI Newbievaner here, just in the process of buying a fiat ducato 2.8 JTD hymer 614 c class gt motorhome and noticed the engine does a pronounced judder on being switched off, is this normal for a 35,000 mile engine ??

I would have said no.
In the past I have had several of those engines in Iveco Daily's and one Ducato of my own plus worked on others for customers.
However there are still many on Forum driving them currently who will be able to give current guidance.

 

[Communicator]

HI Newbievaner here, just in the process of buying a fiat ducato 2.8 JTD hymer 614 c class gt motorhome and noticed the engine does a pronounced judder on being switched off, is this normal for a 35,000 mile engine ??

My x244 2.8jtd PVC was purchased new in 2006, and has similar mileage. Yes it does judder when switching off.
Most UK 2.8jtd engines do not seem to have EGR, which was optional. On later engines where EGR was standard, I have read that the throttle is closed when switching off. Apparently this reduces judder.

 

[bugsymike]

My x244 2.8jtd PVC was purchased new in 2006, and has similar mileage. Yes it does judder when switching off.
Most UK 2.8jtd engines do not seem to have EGR, which was optional. On later engines where EGR was standard, I have read that the throttle is closed when switching off. Apparently this reduces judder.

I am not sure if it is the main reason they have that throttle that closes fully on ignition off, but one reason is to prevent diesels running away/running on their engine oil.
I have only seen it once in real life and it was quite interesting, the guy had been revving the engine and then seemed to have left his foot on the throttle as it carried on revving, I told him to turn the ignition off which he had already done, in the end I dragged him out of the van and I put it in gear and stalled, luckily before any major damage as it has been known to destroy an engine.

 

[Communicator]

I am not sure if it is the main reason they have that throttle that closes fully on ignition off, but one reason is to prevent diesels running away/running on their engine oil.
I have only seen it once in real life and it was quite interesting, the guy had been revving the engine and then seemed to have left his foot on the throttle as it carried on revving, I told him to turn the ignition off which he had already done, in the end I dragged him out of the van and I put it in gear and stalled, luckily before any major damage as it has been known to destroy an engine.

That reminds me of your over lubricated ,out of control, boat engine story.