WOW!!! Now this doesn't look good, check out the excessive slack in this BMW 116i timing chain, and that's with the chain 'tensioner' still tight. No... | By Independent Mercedes & Bmw
Timing chain stretch in N46 engine - BMW 3-Series (E90 E92) Forum
F25 Timing Chain (with photos) - XBimmers | BMW X3 Forum
Yet another 4 series in for a timing chain on the verge of letting go! This was a 2014 430d, covered 80k miles. Customer reported a noise from the... | By ADC