Thread: Front main seal replacement, should I replace the timing chain too?
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Old 08-08-2002, 06:26 PM
P.E.Haiges P.E.Haiges is offline
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Join Date: Jan 2000
Location: PA
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I wouldn't replace the chain unless it was out of spec: IE cam more than 3 degrees late. In fact I didn't replace the chain when I replaced the front oil seal on my '80 300SD. If it ain't broke, don't fix it.

The 2 jobs are not related, seal job is done from underneath and chain is replaced from above except maybe to rotate the engine. by turning the crankshaft nut.

P E H
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