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Old 08-10-1999, 09:02 AM
Joey Salisbury
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Hi All

I am buying a 300DT and cannot findout when the timing chain should be replaced?


Old 08-10-1999, 01:33 PM
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Over the years, I have read *a lot* on this subject - opinions seem to run the range of something like: around 100,000mi. to "I'm over 300,000mi. and I'm not planning on doing a thing until the slack is greater than 5-6 degrees."

For my two 300CD-Ts, I've done it at 125,000mi. Peace of mind in my opinion. You'll probably get plenty of others.

Good luck-

Old 08-10-1999, 04:21 PM
Aaron's Avatar
Join Date: Aug 1999
Location: Cincinnati, Ohio
Posts: 1,937


Diesel timing chains can last any given amount of time. I would have the chain checked pre-purchase and determine if replacement is necessary. On both of my diesels, I am still going on the original timing chains. The 240D at 300K and my 300SD at 170K. As a rule of thumb, diesel timing chains tend to last much longer than gasoline engine chains. Hope this helps!

Aaron Greenberg
MB technician
'67 250SE Cabriolet
'77 450SL
'79 6.9
'79 6.9
'80 300SD
'81 240D
'85 380SE
'89 420SEL
'93 300E 2.8

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