Diesel engine vibration at idle - is this normal?
Discussion
https://youtu.be/Mo5mCWiKjNQ
i made the above video.
Its a 2009 laguna coupe, 2.0 Dci 180bhp, second hand - looking to buy it.
Test drive went great, service history all checks out etc..etc...
but there were 2 issues - a spongy brake pedal (could be low discs/pads/both or characteristic of the car, unsure)
and the vibration at idle from the engine - it seemed excessive. I've never driven a diesel car before, but should i be able to feel the vibration through the drivers seat?
is this normal for a diesel?
it was only ever at idle, applying the tinniest amount of throttle and it would disappear completely.
if not, what would cure it?
by the way - the video was recording at 30fps, hence why it looks like the engine parts are slowly moving back and forth.....but gives you an idea of the magnitude of the vibration.
what could it be, is it normal or should i walk away?
i made the above video.
Its a 2009 laguna coupe, 2.0 Dci 180bhp, second hand - looking to buy it.
Test drive went great, service history all checks out etc..etc...
but there were 2 issues - a spongy brake pedal (could be low discs/pads/both or characteristic of the car, unsure)
and the vibration at idle from the engine - it seemed excessive. I've never driven a diesel car before, but should i be able to feel the vibration through the drivers seat?
is this normal for a diesel?
it was only ever at idle, applying the tinniest amount of throttle and it would disappear completely.
if not, what would cure it?
by the way - the video was recording at 30fps, hence why it looks like the engine parts are slowly moving back and forth.....but gives you an idea of the magnitude of the vibration.
what could it be, is it normal or should i walk away?
Matthen said:
DMF or balance shaft somewhere - that looks pretty extreme. Is there any knock under load?
no knocking or unusual noises under load, no. yeh i think its excessive too, i can't imagine the car being like that brand new out the showroom.....feeling vibration through the seat.
i'm going to enquire with a couple of renault specialists here in the midlands, see what they say, and get it independently inspected by clickmechanic....
i've decided not to bother, it seems like buying a diesel second hand is a total minefield.
I spoke to a renault independent specialist in Nottingham today (highly recommended on the renaultsport forums etc).
Even though he was clearly snowed under he took some time out with me and went through the pro's and con's.
As diesels go he said the renault + PSA engines are right up there as the best, but its so dependent on how they've been maintained.
Things like not using the exact engine oil can lead to serious problems down the line.
He said the vibration could either be something as simple as engine mounts, or dodgy injectors - which'd be an expensive job.
I can't be dealing with that level of uncertainty.
i'll stick with my 2002 mazda until it most likely fails its MOT in july due to all the corrosion, then start looking for a petrol car.
Seems like the only thing within my 6.5k budget is a fully loaded Insignia 2.0T petrol with 217bhp, I'll look for those in the summer.
thanks for your inputs.
I spoke to a renault independent specialist in Nottingham today (highly recommended on the renaultsport forums etc).
Even though he was clearly snowed under he took some time out with me and went through the pro's and con's.
As diesels go he said the renault + PSA engines are right up there as the best, but its so dependent on how they've been maintained.
Things like not using the exact engine oil can lead to serious problems down the line.
He said the vibration could either be something as simple as engine mounts, or dodgy injectors - which'd be an expensive job.
I can't be dealing with that level of uncertainty.
i'll stick with my 2002 mazda until it most likely fails its MOT in july due to all the corrosion, then start looking for a petrol car.
Seems like the only thing within my 6.5k budget is a fully loaded Insignia 2.0T petrol with 217bhp, I'll look for those in the summer.
thanks for your inputs.
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