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Old 11-24-2017, 03:19 PM   #1
Bobbed72
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Rebuild by LS Newbie.

Hey guys, got another LS question. While tearing down the 5.3 that will reside in my C10 SWB clone. I noticed oil on a couple of the exhaust manifold bolts. One on each side. Are the bolt holes open to the oil channels? Do I need to be sure they are sealed properly when I reinstall the exhaust?
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Old 11-24-2017, 03:31 PM   #2
mongocanfly
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Re: Rebuild by LS Newbie.

I've pulled several sets of manifolds off and have never seen oil on the bolts ..
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Old 11-24-2017, 04:59 PM   #3
BR3W CITY
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Re: Rebuild by LS Newbie.

Your valvecover gaskets are leaking, more than likely. Take a look at the heads and see if you can follow a discolored area back up to the valvecover or the bolts that hold it down. Nothing on the exhaust manifold bolts touches an oil passage.
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Old 11-24-2017, 05:52 PM   #4
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Re: Rebuild by LS Newbie.

PO cleaned off the motor somewhat so it may of been that.
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