Engine noises.
Discussion
Hello all,
This may sound like one of those "it could be anything" questions, but I thought I would ask it anyway.
The engine on my 350i is really clattery on acceleration. It sounds like really severe pinking, but I can't be sure. I have been messing around with the timing for ages, but whatever I do the clattering never changes. It sounds like a pedal bike chain being dragged over the sprockets.
The engine power seems fine and the car has been running like this for probably 3000 miles now. Is there anything else that could make a noise like this? I have read "The Bible" and checked all the points here, but I don't have a lot of money for full engine services etc. Its probably impossible to diagnose without hearing it, but I thought I'd ask anyway.
Best regards
Daniel
(Green and Silver 350i)
This may sound like one of those "it could be anything" questions, but I thought I would ask it anyway.
The engine on my 350i is really clattery on acceleration. It sounds like really severe pinking, but I can't be sure. I have been messing around with the timing for ages, but whatever I do the clattering never changes. It sounds like a pedal bike chain being dragged over the sprockets.
The engine power seems fine and the car has been running like this for probably 3000 miles now. Is there anything else that could make a noise like this? I have read "The Bible" and checked all the points here, but I don't have a lot of money for full engine services etc. Its probably impossible to diagnose without hearing it, but I thought I'd ask anyway.
Best regards
Daniel
(Green and Silver 350i)
The engine has hydraulice tappets so lack of oil would cause this possibly (sorry if this is a bit obvious!)
The camshaft is driven by a short chain, which does not have a tensioner - so this could be the problem, although I have not heard of this before. You can uprate the chain to a heavy duty item with the engine still in the car. Parts are cheap and it's not too difficult.
If it is pinking, maybe your distributer is shot?
Danny
The camshaft is driven by a short chain, which does not have a tensioner - so this could be the problem, although I have not heard of this before. You can uprate the chain to a heavy duty item with the engine still in the car. Parts are cheap and it's not too difficult.
If it is pinking, maybe your distributer is shot?
Danny
Danny:
I used a long bolt and sawed a slot in the end! Couple of layers of heatshrink sleeving to stop it scoring the alloy if you get a bit carried away.
Regarding the noises: it might be the timing chain, but if it gets as slack as my ex-wife's pants it'll start to affect the running of the engine. Otherwise, it could be waterpump or alternator bearings are shot.
W>
I used a long bolt and sawed a slot in the end! Couple of layers of heatshrink sleeving to stop it scoring the alloy if you get a bit carried away.
Regarding the noises: it might be the timing chain, but if it gets as slack as my ex-wife's pants it'll start to affect the running of the engine. Otherwise, it could be waterpump or alternator bearings are shot.
W>
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