[tomloans]

Hey guys. Need some help. Just picked up a 2000 540i with our 740 engine. It has vanos and guides done just 1500 miles ago. Yet I still have start up clatter. Any one have a similar scenario?

 

[sealbeach740]

Replacing the timing chain tensioner with the newer designed one (the one with the longer spring) has helped reduce (but not totally eliminate) that start up rattle. Plus, it's a cheap investment in pro-longing the chain guides wear (less chain slap against the guides).

 

[tomloans]

It is hard to believe that they didn't replace this when the new timing chain and guides were replaced. I have one on order. Thank you

 

[sealbeach740]

Well, in defense of whomever did that work, the old timing chain tensioner probably still worked, just not as good as the new replacement ones do.

 

[tomloans]

Thank you and I hope you are right. It doesnt do it every morning so hopefully this is it.