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Old 09-29-2003, 12:39 AM
Registered User
Join Date: Feb 2003
Location: Burbank, California
Posts: 184
92 300D 2.5 Turbo diesel pistons Life?

Rebuilding engine- car has 300,000 miles on it.

Some members have recommended to use pistons again. I will have them checked out.

Can I get another 500,000 miles on these pistons?

What is the life of diesel pistons?

Thank you


PS-Thank you to P.E.Haiges=excellent input to have a steel spacer put in. This will bring the ring lands to a new size.

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Old 09-29-2003, 12:25 PM
MrCjames's Avatar
California Dreaming
Join Date: Jun 2003
Location: SF Bay Area
Posts: 599
If the pistons measure up to specification than reuse should not be a problem.

If I were rebuilding it, I would prefer installing new pistons. I would hate to think that I saved a few bucks only to dismantle and reassemble the engine a second time in a short amount of time. I do not care to do a job this large twice on the same vehicle, and on the same visit.

If you are looking to sell the vehicle plus maintain a good margin than your decision might be to reuse the pistons.
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Old 09-29-2003, 04:43 PM
sixto's Avatar
smoke gets in your eyes
Join Date: Jun 2000
Location: Eastern TN
Posts: 20,812
I followed Nick's thread in the Diesel forum. OM602 pistons are $500 a pop!

95 S420
91 300SE
87 300SDL
83 300SD
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Old 09-29-2003, 05:21 PM
blackmercedes's Avatar
Just a guy
Join Date: Dec 2000
Location: St. Albert, Alberta, Canada
Posts: 3,492
IF the pistons are not seviceable, it sounds like replacing them is cost prohibitive. I would probably source a long-block and see if that was a less expensive alternative.

602 pistons are $500?

John Shellenberg
1998 C230 "Black Betty" 240K
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