Quote:
Originally Posted by engatwork
On w123s and w124 diesels I've typically changed them at around 250k miles. I also change out all the guides, slid rails and tensioner of the timing chain and oil pump chain tensioner. The one you will find the most wear on is the tensioner on the oil pump chain, in addition on the w123 you will see a wear mark on the oil pump tensioner spring. Something about the way it is positioned in there. The most mileage I've changed an original chain/tensioner on was 320k+ miles on a 98 E300 and it was still running good when I changed them as preventive measures.
I have yet to do a MB v6/V8 timing chain/tensioner. I seem to vaguely remember doing an 83's era SL but can't say for certain.
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Not uncommom for the om606 chains to last 320k plus. My 98 didnt get changed until 350k (i bought it with a rattling chain) and 390k on my 99 e300 with 450k atm. It was noted on my 99 that it was measured at 3 degrees at 390k and owner replaced it as prevanative measures.
I have 200k on my 99 and 200k almost on the 92 300d not changing them any time soon hopefully
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Only diesels in this driveway.
2005 E320 CDI 243k Black/Black
2008 Chevy 3500HD Duramax 340k
2004 Chevy 2500HD Duramax 220k