kam-325i 5 Report post Posted August 6, 2016 Done an oil and filter change on wednesday to the 156, ive only done about 30 miles in the thing since then and now its got a horrible knocking on acceleration. The knocking is engine speed related, sat on the drive, and rev it in neutral, and the knock is there, not there on lift off throttle, more promanant at around 2500-3000rpm, i darent take it over that. is it the big ends ? Quote Share this post Link to post Share on other sites
Smaky 73 Report post Posted August 17, 2016 Sounds like it could be, but don't rule out a sticking tappet, but to be sure remove the cam cover and examine the cam lobes, any wear and it will probably be the big ends making the noise. Quote Share this post Link to post Share on other sites