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Old 09-19-2003, 01:44 PM
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sixto sixto is offline
smoke gets in your eyes
Join Date: Jun 2000
Location: SF Bay Area
Posts: 20,118
Can you replicate the sound by reving the engine against the brakes with the transmission in D? Don't do this for more than 5 seconds at a time and let it idle for a minute between tries. Otherwise you'll cook your transmission fluid.

If so, it might be rod knock. Not a good thing in any circumstance.

Could also be noisy lash adjusters or nailing. Do a search on these key words. Maybe try lifters in place of lash adjusters. You can focus on the Diesel Discussion forum.

95 S420
91 300SE
87 300SDL
83 300SD
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