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[bp_porcaro]

I have just bought a year 2000 Omega 2.5td GLS with 135,000 mls.
There is a rattle / cyclic noise from engine which changes as the revs change.
I investigated today with tube onto ear touching various parts of running engine !!
It sounds to me like it may be a camshaft rattle as it is loudest at the housing just infront of the oil filler.
Can anyone tell me if there is a bearing at this end of the cam that is prone to wear?
Is it an easy job or not to fix?

Cheers, BP
(new member today )

[Omegatoy]

oh oh!!! just infront of the oil filler housing is the timing chain, the guides do wear if oil changes are neglected, which allows the chain to slap around, chains and guides are available and the job can be done without rmoving cylinder head but if its really noisy would do it soon!! only other thing it might be is the hyddraulic timing chain tensioner is sticking or not reaching far enough?

[bp_porcaro]

Thanks for such a quick reply.

Is there a way to check for timing chain tension / setting and wear without major striping off of parts?

Cheers. BP

[Neil (Cardiff)]

I'm not very familiar with the Omega yet but from previous experience - I wouldn't let your timing chain fail completely! I'd get it sorted sharpish 

[Seth]

Probably sounds thus: ck - ck - ck - ck - ck ?
Particularly noticeable when the engine's on the over-run.

Before delving further, I'd remove the viscous fan and aux drive belts, then run the engine to see if the noise disappears. This'll eliminate the auxiliaries.

[Seth]

Thanks for such a quick reply.

Is there a way to check for timing chain tension / setting and wear without major striping off of parts?

Cheers. BP

In a nutshell - no.

If I remember correctly, you'll need to remove the timing-case (and associated gubbins), and lower the sump onto the subframe. Then you should be able to see what's what, so to speak.

Omegatoy has delved deeper than I on this - try a 'PM' to him.

[TheBoy]

Probably sounds thus: ck - ck - ck - ck - ck ?
Particularly noticeable when the engine's on the over-run.

Before delving further, I'd remove the viscous fan and aux drive belts, then run the engine to see if the noise disappears. This'll eliminate the auxiliaries.

don't run for long with no aux belt - no waterpump!

[TheBoy]

worth checking aux tensioner

[damage consultant]

is it a constant ck ck (i.e. is it like every 1 second) does it get faster if you rev the engine?

[bp_porcaro]

As i have put in the title of the posting the noise apears to be cyclic  ie, not every rev, but increases with the revs, if you know what I mean.
It may be something that is related to just one cylinder (so the noise appears every sixth rev.)
Or related to a point on the flywheel or something ??
It is difficult to pinpoint.
I may try to record it and put a link on a reply so people can listen to it.

[bp_porcaro]

As someone has sugested, i will try a quick engine run without the belts to prove it is none of the aux.
Will try to get round to that early this week.

Cheers again for the help.

[bp_porcaro]

I have recorded the engine noise and posted onto youtube. Click the link below to listen....

http://www.youtube.com/watch?v=O0qSpp03AwU

Any comments or ideas on what it is, would be appreciated.
Cheers, BP.

[Welung666]

Sound very much line a bearing in a tensioner or aux item (power steering pump, water pump or Air con pump) to me.

[damage consultant]

PMSL so its not only my 2.5td that souds like that

[Welung666]

PMSL so its not only my 2.5td that souds like that

Mine doesn't