S40: - rattling idle - Page 2

desolation · Mar 2nd, 2011, 17:31

Replaced all the engine mounts now, but the problem is still there :/

They were obviously worn though, so it's not like I replaced em for nothing because I feel a lot less vibrations in the car now, but the rattling is still there under cold idle. It's coming from the left side of the engine in the area where the belts are...

Helibatics · Mar 3rd, 2011, 17:55

On that side of the engine it's very likely to be the aux belt idler pulley bearing worn out. Very worth changing if it is because if it seizes the belt can take out the timing belt too.

desolation · Mar 5th, 2011, 18:24

Allright, timing belt is due for a change as well together with gbox oil, so that's gonna be a good maintenance there.

Is changing the timing/aux belt and pulleys/tensioners something that is doable by a good hobby mechanic ?

desolation · Mar 7th, 2011, 10:21

It seems to be coming from the pulley on the alternator.
Can I change the pulley seperately, or am I looking at a donor alternator ?

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Mar 2nd, 2011, 17:31	#11
desolation Junior Member Last Online: Mar 4th, 2012 13:58 Join Date: Nov 2010 Location: Kortenberg	Replaced all the engine mounts now, but the problem is still there :/ They were obviously worn though, so it's not like I replaced em for nothing because I feel a lot less vibrations in the car now, but the rattling is still there under cold idle. It's coming from the left side of the engine in the area where the belts are...

Mar 3rd, 2011, 17:55	#12
Helibatics Junior Member Last Online: Feb 18th, 2017 13:47 Join Date: Mar 2008 Location: Chester	On that side of the engine it's very likely to be the aux belt idler pulley bearing worn out. Very worth changing if it is because if it seizes the belt can take out the timing belt too.

Mar 5th, 2011, 18:24	#13
desolation Junior Member Last Online: Mar 4th, 2012 13:58 Join Date: Nov 2010 Location: Kortenberg	Allright, timing belt is due for a change as well together with gbox oil, so that's gonna be a good maintenance there. Is changing the timing/aux belt and pulleys/tensioners something that is doable by a good hobby mechanic ?

Mar 7th, 2011, 10:21	#14
desolation Junior Member Last Online: Mar 4th, 2012 13:58 Join Date: Nov 2010 Location: Kortenberg	It seems to be coming from the pulley on the alternator. Can I change the pulley seperately, or am I looking at a donor alternator ?

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