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  #1  
Old 09-10-2019, 11:53 AM
Rotorblade Rotorblade is offline
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I need some help regarding the timing chain. Until the oil reaches the nominal temperature there is a rattling noise that can be heard from the engine. It currently runs on motul 300V power 5w40...had the same issue with castrol 5w30 except it would warm up quicker. It starts from 1500rpm then if you go above 2k it gets quieter and reappears when you lift the foot off the gas pedal. It sounds like the chain of a bicycle when rotating the pedals backwards . When the engine gets hot the sound is hard to detect. I've already replaced the chain tensioner but nothing changed. I suppose this engine needs a timing chain replacement. Also I was wondering, it doesn't seem to be enough space in front to work at the chain, is it necessary to remove the front bumper, radiators and the metal elements body between the radiators and the engine?

The car is a 2008 e86 3.0si, 100k miles
Thanks

Last edited by Rotorblade; 09-10-2019 at 02:03 PM.
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Old 09-10-2019, 08:48 PM
Andyz4 Andyz4 is offline
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With only 100k on the car, I don't think its your timing chain. That noise could also be a dry or worn pulley bearing on one of the ancillary components. For a quick test, try running the car with the serpentine belt removed and see if the noise is still there.
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Old 09-11-2019, 01:29 AM
Rotorblade Rotorblade is offline
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Thank you.
I'll check with the mechanic next week. The car has 100k mileage but I also did 100miles on a race track. I've heard that they may need replacement between 100-200k km depending on driving style and maintenance. I bought the car at 150k km and the previous owner changed the oil at bmw recommended intervals which is not that good (2y/25k km)
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Old 09-12-2019, 09:14 PM
Andyz4 Andyz4 is offline
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I hear you but 100 miles on a racetrack should make no difference to the timing chain. Don't let him sell you a timing chain job before you try my suggestion.
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