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V90 Mystery noise S90-V90 1998

Hey All,

I'm trying to diagnose a hard to locate problem. I've attached a YouTube video of the noise.

Here's the link:

https://youtu.be/PAmanmQ0YVY

At the beginning of the video, I've got my camera down near the rear (firewall) of the engine on the exhaust manifold side. I then walk around the car and into the cabin. As you can hear, I put the car in neutral, apply the hand brake, and then put it in drive, and then back out. The sound is apparent when there's a nominal load on the engine, whether it's in D or R. It's the deep throbbing sound. At the same time, there's a metallic chirping sound.

First, let me say that I've a) had my mech guy diagnose it (a 30+year Volvo only guy) and then, on his recommendation, took it to a Volvo dealer and paid them to give me a diagnosis.

My Volvo guy (Peter) initially thought it might be engine mounts. The Volvo dealer also diagnosed the sound as engine mount failure. So Peter replaced the engine mounts. He also replace the serpentine belt and the transmission mount.

The noise is still there.

Peter thinks it could be internal engine issue, specifically a thrust bearing washer. On the other hand, the car is an automatic. It has 251,XXX miles on the original engine. It is a beautifully kept, fully serviced car, with an ownership history that shows superb maintenance at every level.






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New V90 Mystery noise [S90-V90][1998]
posted by  someone claiming to be Makenna  on Fri Dec 11 15:11 CST 2020 >


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