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 40HP Blown Head Gasket 
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MMT Member

Joined: Tue Jun 25, 2019 1:17 pm
Posts: 12
Post 40HP Blown Head Gasket
About to swap out a blown head gasket (verified with a leak down test), on my 40HP B&S. Do y'all resurface the heads, or just throw the new gasket on and roll with it?


Thu Jul 30, 2020 8:20 am
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Joined: Mon Dec 31, 2012 11:07 pm
Posts: 4820
Location: West Monroe, LA
Post Re: 40HP Blown Head Gasket
I'd check the head and the block with a straight edge and see if they're truly flat. If it blew a gasket, it probably is warped (but possibly not), which means another blown gasket in your future. If it's warped, pull the other side too and get them both shaved to match.

#CFFITR
#mudmotor>physics


Thu Jul 30, 2020 9:02 am
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Joined: Fri Jan 10, 2014 1:16 pm
Posts: 2107
Location: Gladewater TX
Post Re: 40HP Blown Head Gasket
Agreed ^^ on a seasoned head the deck surface moves around near the exhaust port and towards the pushrods. Guessing it pushed the gasket towards pushrods


Thu Jul 30, 2020 8:46 pm
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