Clunk while idling

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03-28-2008, 09:55 AM

zake

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Clunk while idling

1996 Volvo 850 GLT
163,000 miles

After I have driven the car for between 30-60 minutes there is a clunk that will occur somewhere in the engine bay while sitting and idling. I don't know if this is possibly a problem when the fans are engaging or possibly the alternator. The transmission has never given me any problems. Shifts into each gear fine and never slips or stutters no matter how hard I get on it. Any help would be appreciated.

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03-28-2008, 10:00 AM

JPN

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RE: Clunk while idling

It could be anything; finding the source of a noise is one of the hardest tasks, and not being able to see it makes it even harder.

I would check the engine mounts but see if you can hear from Moderator Tech.

JPN

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03-28-2008, 05:39 PM

Volgrrr

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RE: Clunk while idling

Quote:

ORIGINAL: zake

1996 Volvo 850 GLT
163,000 miles

After I have driven the car for between 30-60 minutes there is a clunk that will occur somewhere in the engine bay while sitting and idling. I don't know if this is possibly a problem when the fans are engaging or possibly the alternator. The transmission has never given me any problems. Shifts into each gear fine and never slips or stutters no matter how hard I get on it. Any help would be appreciated.

Bearings in the serpentine belt tensioner on the way out?

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03-29-2008, 11:12 PM

bitter356

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RE: Clunk while idling

While the car is in park and the engine running, defrost off, observe the tensioner pulley.If it is vibrating greater than 1/4", the tensioner is the culprit.

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04-07-2008, 04:14 PM

TOm93R1

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RE: Clunk while idling

I get the same clunk. Never does it once I start moving.
My tensioner definately is on its way out, so good chance these guys are correct!
thanks for the hint, I have been wondering what the noise is for as long as I have had the car (about a year)

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04-07-2008, 05:36 PM

Svtfiveoh

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RE: Clunk while idling

I get a thump or a clunk on the driver side almost behind the driver side fender.. It only happens once its warmed up.It almost sounds like when you turn off the car and its cooling down and you a tink tink or clunk clunk.....

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