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Old 07-10-2011, 04:11 PM
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doru doru is offline
Officially Welcomed to the 'Fest
Location: Calgary
Join Date: Sep 2007
Posts: 4,703
Mein Auto: 2003 530iA
Originally Posted by poolman View Post
Great write up Doru, did this help out on the road. More power or smoother feel on the highway?
I am not sure about "smoother feel" - my car was always smooth. Here is the story:
I purchased the car still under warranty. Pretty much new - less than 40 k miles. No noise, all was good.
In time and 5-6 years later a cacophony of noises were present from startup (which were not there), but these noises developed gradual - like the vanos seals failure if you will.
You just notice one day that "man, that thing is noisy, what the heck?"
Then I did the cooling overhaul and changed all the pulleys and tensioners. I lost quite a bit of noise, but some whirring and ticking was still there. Then I changed the DISA, which almost fell apart, and the whirring was gone. But I still had some sort of noise and thought it's the vanos rattle. So I changed the spring inside the tensioner. Now all the noises were gone. The cherry on the cake was the air pump check valve, which made a different sound from the original one (the whole SAP system if you will). Now there is no sound, or it's the sound of a like new car. No whirring, no hissing, no rattling, nothing. Just a soft purr of the engine.
Looking for a DIY? Parts? Check this out, it might be your ticket

Stable: e92is, e46, , e83, f25, e53 - sold, e39 RIP
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