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Old 09-06-2014, 02:37 AM   #16
leftybass209
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Join Date: Feb 2011
Location: Modesto, CA
Posts: 2,179
Re: TH400 pan still leaking!

The only advice I can offer is, follow the directions, and I mean that in the nicest way. I always read about people with leaks and others swearing by certain gaskets. Rubber, cork, paper, or just sealant I don't have any leaks, and i don't say that with a chip on my shoulder. I always prep the same: clean the surface with a plastic scraper and a soft brass wire brush, wipe with mineral spirits, wipe with acetone, apply gasket per manufacturer recommendations and finger tighten all bolts followed by recommended torque specs. Re-check torque specs in the tightening sequence after running up to operating temp. Fwiw- I do use stock pans, but have the same results with stock or aluminum valve covers.
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