Hello again
I drove my 406 2.2Hdi the other day at around 85-90mph (very quiet roads here in France...) and notice that immediately after this short burst at speed the engine felt as if it was 'wobbling'. The effect last for for several minutes and only seemed to disappear after I slowed down to around 70mph and maintained this speed for about 3 miles.
I'm pretty sure that my lower engine mount is on it's way out from the way the engine rattles on startup and stopping - could the mount be causing this wobble at high speed aswell. Already had a new DMF fitted and new auxiliary bits so pretty sure it's not those.
Any suggestions welcome...
Wobbly Engine at high revs
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Wobbly Engine at high revs
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steve_earwig
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Re: Wobbly Engine at high revs
Lord knows 
I don't like the sound of that rattle, sounds like something's loose (who changed your DMF? 
). If it is your bottom mount I'd be worried about it fracturing the flexible section...
I don't like the sound of that rattle, sounds like something's loose (who changed your DMF? ). If it is your bottom mount I'd be worried about it fracturing the flexible section...Unskilled meddling sin©e 2007
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Welly
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Re: Wobbly Engine at high revs
My rear mount was completely shot but never produced a 'wobble' whilst driving at speed except perhaps when rising over a crest in the road when the weight was lifted from the front slightly but then I still felt that a bit when the mount was replaced 
Are you sure it's not just wheel balancing?
Ooh, a short loud chirp/chatter/squeek on start up does ususlly point to the DMF but you can reproduce some of the noise by driving slowly and bringing the clutch in/out sharply to produce a similar chatter/chirp/squeek (the things we have to describe eh?
)
Are you sure it's not just wheel balancing?
Ooh, a short loud chirp/chatter/squeek on start up does ususlly point to the DMF but you can reproduce some of the noise by driving slowly and bringing the clutch in/out sharply to produce a similar chatter/chirp/squeek (the things we have to describe eh?
)Cars in my care:
2021 Kia Spottage 1.6 Pez Turbo Dual Clutch Gearbox Trickery
2013 Renner Twingo - donkey work
2021 Kia Spottage 1.6 Pez Turbo Dual Clutch Gearbox Trickery
2013 Renner Twingo - donkey work
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Doggy
- Mod with a 2.2 HDi, De-Fapped!
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Re: Wobbly Engine at high revs
Mine was doing something similar on a weekend jaunt to France a week or so back - just between 130 / 135 kph! I noticed it only did it some of the time and I can't seem to reproduce it back in the UK 
Had a really bad verison of this about a month back, which was down to a lumpy osr tyre. When I noticed it in France my 1st thought was I hadn't completely cured the problem, but I began to wonder if it might be just some road surfaces. It seems fine now I'm back home!
The noise you describe could be aux drive belt pulley, (I know you said it's been done), but you can eliminate it easily by removing the aux belt & seeing if the noise goes too.
Had a really bad verison of this about a month back, which was down to a lumpy osr tyre. When I noticed it in France my 1st thought was I hadn't completely cured the problem, but I began to wonder if it might be just some road surfaces. It seems fine now I'm back home!
The noise you describe could be aux drive belt pulley, (I know you said it's been done), but you can eliminate it easily by removing the aux belt & seeing if the noise goes too.
2002 HDi 2.2 Exec Estate, (2008-12) (wonderful)
2003 HDi 2.2 6-speed Exec Estate (2012-19) (also a gem)
2009 Citroen C5 2.0 HDi VTR+ Estate (godawful heap)
2008 BMW E91 330i touring (great fun - murdered by a reversing SUV)
2007 BMW E91 325i touring (slower smoother quieter)
2003 HDi 2.2 6-speed Exec Estate (2012-19) (also a gem)
2009 Citroen C5 2.0 HDi VTR+ Estate (godawful heap)
2008 BMW E91 330i touring (great fun - murdered by a reversing SUV)
2007 BMW E91 325i touring (slower smoother quieter)
Re: Wobbly Engine at high revs
Thanks for all your replies Chaps.
Got it booked into the Pug dealer in Cognac next week (who did all the previous bottom pulley/DMF stuff) for a diagnosis - they have a rolling road and said they can run it up to 150kph (95mph) if necessary.
Got it booked into the Pug dealer in Cognac next week (who did all the previous bottom pulley/DMF stuff) for a diagnosis - they have a rolling road and said they can run it up to 150kph (95mph) if necessary.
Get me a left-handed spanner PRONTO!
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Welly
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Re: Wobbly Engine at high revs
Wow! how cool is that406gtx wrote:they have a rolling road and said they can run it up to 150kph (95mph) if necessary.
Cars in my care:
2021 Kia Spottage 1.6 Pez Turbo Dual Clutch Gearbox Trickery
2013 Renner Twingo - donkey work
2021 Kia Spottage 1.6 Pez Turbo Dual Clutch Gearbox Trickery
2013 Renner Twingo - donkey work
Re: Wobbly Engine at high revs
Yeah - their garage is bloody huge - it's got 8 bays and there must be at least 20 mechanics on site - mind you every third car here is a Pug...Welly wrote:Wow! how cool is that
Get me a left-handed spanner PRONTO!