weird chain saw noise coming from motor

[Nic_s]

exact same noise..

looks like its the tensioner pulley

Agree. I was thinking of a grinding sound when you said chainsaw.

 

[frikkieh]

In order of the most economical way to fix this:

1.) Check power steering fluid level.
2.) One more vote for a tensioner pulleys - replace all three. While your at it, the belts.
3.) Worse case - alternator - here is a link with video of how that one sounds:
http://www.bmwfanatics.co.za/showthread.php?tid=24257&highlight=vacuum

Although it does not fit the description of what you car sounds like, this one is described as sounding like a vacuum cleaner.

Power steering pump - never replaced mine, that why it sound the way it sounds :rollsmile:

 

[Philip Foglar]

Here are the two vids I took before and after replacing the pre-tensioner pulleys.

This was how it sounded when I bought the car and in this clip just before replacement:
[video=youtube]

And now with the two pre-tensioner pulleys on the main belt replaced - need to still replace the pre-tensioner pulley on the AC belt:
[video=youtube]

 

[Loom]

Here are the two vids I took before and after replacing the pre-tensioner pulleys.

I like the second one more :=):

 

[gizmowp]

Here are the two vids I took before and after replacing the pre-tensioner pulleys.

This was how it sounded when I bought the car and in this clip just before replacement:
[video=youtube]

And now with the two pre-tensioner pulleys on the main belt replaced - need to still replace the pre-tensioner pulley on the AC belt:
[video=youtube]

Definate same noise, it gets louder when you accelerate as well hey.

how much did it set you back?

 

[Philip Foglar]

Here are the two vids I took before and after replacing the pre-tensioner pulleys.

This was how it sounded when I bought the car and in this clip just before replacement:
[video=youtube]

And now with the two pre-tensioner pulleys on the main belt replaced - need to still replace the pre-tensioner pulley on the AC belt:
[video=youtube]

Definate same noise, it gets louder when you accelerate as well hey.

how much did it set you back?

Yep, was at its worst in the mornings of course!

Really not that expensive - got the two pre-tensioner pulleys from Masterparts, iirc they were something like R100-R200 each, the third one roughly the same. Can dig up the slips and check. But check realoem as well to see what they look like - Masterparts have their own parts database so often a case of making sure that they are giving you the correct items.

Here are the two that I replaced - the one that attaches to the alternator and then below it. Easy DIY, just a bit fiddly, but no need to cost a fortune! :thumbs: