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Old 04-25-2017, 06:46 AM   #11
hemi43
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Join Date: Mar 2015
Location: Ontario Canada
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Re: New crate motor leaking get rear main seal

Not sure what oil you're using, but even though this is a new engine, it still uses some old school sealing technology like the oil pan area. Some may argue this, but don't run synthetic oil unless the engine is specifically designed for it. If you were to put synthetic oil in the original engines our Blazer came with, you can guarantee they will leak.
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