Tor 3 Report post Posted March 3, 2020 Hoping someone has some ideas. I have a 2001 540i bought with broken chain guides. To cut a long story short, I replaced guides, did not use timing tools, then as car had weird behaviour, redid timing this time using proper tools (the timing chain was off by 1 link) So engine now sounds good (it did before retiming), BUT after getting warm with revs > 1500 the engine stalls with a terrible mechanical noise (got me worried first time). Then restarts and engine is all sweet until next time it stalls I thought it may be a failing bearing in the alternator/power steering pump, but cannot understand why it stalls the car. Removed drive belt and all bearings are good. Have run the car a short time without the serpentime drive belt and it reved happily to 5000rpm. Put belt back on and same behaviour as previously, stalls with a mechanical noise The car has been at 2 different mechanic's, one our local Bmw guy but no suggestions for what needs fixing. The Bmw guy recorded Vanos fault Bank 1/possible cam sensor fault, but his was before i redid timing Any suggestions for what i need to check? Quote Share this post Link to post Share on other sites
325_driver 422 Report post Posted March 4, 2020 Maybe you are right with a failing bearing in one of power steering alternator ac, but maybe spinning under load re created the issue. Have you isolated the noise? Quote Share this post Link to post Share on other sites
Tor 3 Report post Posted March 7, 2020 (edited) Waiting for a new timing chain tensioner. Noise is not due to a failing bearing as issue is there also when serpentine belt removed Looks like it is a vanos solenoid issue, timing incorrect causing pinking. Removed electrical plug to solenoid on bank 1 and car runs fine Edited March 9, 2020 by Tor Quote Share this post Link to post Share on other sites
Tor 3 Report post Posted March 17, 2020 Still strange. Replaced 1 x vanos solenoid valve but behavior is the same. So I replaced bank 2 solenoid with a new one and moved solenoid from bank 2 to bank1 Car still cuts out and stalls with Bank 1 solenoid connected. Remove connection to solenoid for bank 1 and car runs fine. The only thing I can think of is that there is a short somewhere in the wiring to solenoid on bank1? Any other suggestions? Quote Share this post Link to post Share on other sites
