Found out it was a loose bracket connected to the exhaust manifold head shield after doing my headers. lol vanos is fine.
Found out it was a loose bracket connected to the exhaust manifold head shield after doing my headers. lol vanos is fine.
I am getting the rattling sound only on cold start up. I actually never stood in front of the engine to pinpoint the source of the sound, but it is also only for a half second and sounds like 'marbles in a tin can'. Can i be pretty sure the vanos is the culprit?
If you google e46 VANOS rattle, you see some YouTube videos, compare your sound with them...
You know, i'll be honest, it sounds different. I should have recorded the sound, but it is just a very sharp, loud, half second rattle on cold start (like 4 hours).
https://www.youtube.com/watch?v=29fdzGxsBr0
Sounds exactly like this, but I don't know if it is truly the vanos.
Hot/warm starts don't have even a hint of it. Now I am thinking, should i even bother sending my unit to dr. vanos, if it may not even be the source of the sound. The only problem is, I don't want to put the engine back together, diagnose the sound, find out it IS the vanos, and have to tear open my valve cover again to take the vanos out.
Personally, that sounds like stuck valves that then get moving again, but I'm not particularly well versed in diagnosing abnormal engine sounds
I would not mess with the vanos unless you are absolutely sure that is what is causing the noise. Could it be something like this:
http://www.bimmerfest.com/forums/showthread.php?t=76452