Timing Chain Mercedes 307d - PeachParts Mercedes-Benz Forum

elaine@fowler35 · #1 12-08-2005, 11:16 AM

Hi, hoping somebody can advise me. I have just bought an old (1986) Merc 307D. I have read that the timing chain should be renewed every 100,000 miles. I drove the van 500 plus miles home and it pulled well and returned almost 30 to the gallon but was quite noisy and clattery. Since I have no service history with this van I am going to renew the timing chain but my local commercial Merc dealers say it is very very likely to be unnecessary as these chains hardly ever stretch or fail. Can anyone advise please?

samiam4 · #2 12-08-2005, 11:21 AM

You can measure timing chain stretch!

Pull the valve cover and inspect things while doing a tune-up. It's the V8's which seem to need timing chains regularly @ 100k or so. Diesels have shorter chains which adds up to less stretch.

Don't know a thing about a 307D!!!

Michael

elaine@fowler35 · #3 12-08-2005, 05:21 PM

Quote:

Originally Posted by samiam4

You can measure timing chain stretch!

Pull the valve cover and inspect things while doing a tune-up. It's the V8's which seem to need timing chains regularly @ 100k or so. Diesels have shorter chains which adds up to less stretch.

Don't know a thing about a 307D!!!

Michael

Thank You! I will get Mercedes to check the chain for stretch, don't know why they didn't tell me that they could check the chain in this way, as you can see I have little mechanical knowledge.