arcon 3 Report post Posted August 19, 2018 In a recent service on my E46 the main drive belt tensioner and pulley idler were replaced. Now it chirps / rattles quite loud at idle. ... ? Bad install, new parts wearing in or possibly something unrelated... what is the most likely option lol. Quote Share this post Link to post Share on other sites
B.M.W Ltd 950 Report post Posted August 19, 2018 Take it back and have them recheck it. Could be waterpump or alternator bearing noise you are hearing Quote Share this post Link to post Share on other sites
M3AN 4016 Report post Posted August 20, 2018 Yep, you're entitled to take it back and ask them what's up. if you want to track it down yourself you can take off/loosen the belts (making a note of their path and direction of movement) and spin all the pulleys by hand until you find the cranky one. Quote Share this post Link to post Share on other sites
arcon 3 Report post Posted September 28, 2018 getting back to this thread really late, but yeah it was just faulty brand new parts (top tensioner belt / pulleys). thanks to the team at Burgers for a speedy warranty replacement. Quote Share this post Link to post Share on other sites
Eagle 1662 Report post Posted September 28, 2018 Was it some lower quality aftermarket brand? Quote Share this post Link to post Share on other sites
