Rear Main Leak?
I am running Rotella T4 15-40 and it’s runs great-even in the winter.
Its always has a bit of an oil leak, but getting a little heavier. Do we think this could be the rear main seal leak?
As always, thanks for the help!
Replies to This Discussion
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Permalink Reply by Logan Robb
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Permalink Reply by Russ Austin
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Have you checked on the oil sending unit? They like to leak at the top, or it could be valve covers leaking.
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Permalink Reply by Dennis P. DiBari
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Hi Logan,
Russ is right. Check that nothing is leaking from the top and dripping down. The sender switch is in the rear as he said. Also, from the valve cover gaskets - that the return holes are clear under the valve covers. If not, it probably is the rear main seal (the Achilles Heel of the 429 CI). Good luck with it.
Dennis DiBari, Cottekill, NY
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