my 300sd has 253000 miles eny way i can tell if timeing chain has been replaced or needs to be. thanks in advance you guys are great. Bobco se.ks.

Search this forum. You will find a lot of info. The followng post written by Steve is the official way to measure the chain:

Measuring timing chain stretch.

David

Pull the valve cover, there are marks on the tower and the washer on the back side, line them up and then check the timeing marks on the crank dampner. the differance from t.d.c. is the amount of wear, up to 8 is ok mine has 245,000 miles and about 3 of wear.
Jerryb

thanks guys ill get to it as soon as i get it to shut off.Bob se.ks

I was wondering, can a stretched timing chain affect fuel economy? I never get over 26 mpg highway, and my chain was at 3 degrees about a year ago. Thanks,

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Bob Roe
Lehigh Valley PA USA
1973 Olds 88, 1972 MB 280SE, 1978 Datsun 280Z, 1971 Ford T-Bird, 1972 Olds 88, 1983 Nissan Sentra, 1985 Sentra, 1973 230.6, 1990 Acura Integra, 1991 Volvo 940GLE wagon, 1983 300SD, 1984 300SD, 1995 Subaru Legacy L wagon, 2002 Mountaineer, 1991 300TE wagon, 2008 Murano, 2007 R320CDI 4Matic 52K, some Hyundai, 2008 BMW 535xi wagon, all gone... currently
2007 Honda Odyssey Touring, 2014 E350 4matic