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2001 Forester Automatic
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8 Posts
Discussion Starter · #1 ·
'01 Forester with about 213k

Engine makes a rattle like noise when revving between 1500 - 2000 rpm or on cold start. Sound appears to be come from around the A/C compress or behind. My brother loosen the belt attached to the compressor and thought it was unlikely coming from it. Here is a video that demonstrates the sound: https://photos.google.com/share/AF1...?key=b1hCU1hUQUFaZXcxTjRmRVhEYUpEcmNNRndQallR

Watch with sound on. No check engine light

Head gaskets were done a little over a year ago. Recently had an o2 sensor replaced (check engine light went on when I had this issue).

Thanks for the help.

Chris
 

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Premium Member
2018 X3 M40i / 2016 X3 xDrive35i
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1,632 Posts
Doesn't sound like rod knock to my ear. Rod knock doesn't usually go away. Sounds like timing belt tensioner.

Watch below, skip to 4:30
 

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2001 Forester Automatic
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8 Posts
Discussion Starter · #5 ·
Hey folks, I ended up getting it in the shop. Fortunately it was only the tensioner! This subby will live another day.

Thanks for the help
 

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Discussion Starter · #7 ·
No, it was the timing belt tensioner failed, so I guess the rattle was a wobbly timing belt. Lucky I didn't destroy the engine getting it to the mechanic!
 
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