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Blown Head Gasket

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CaptPete
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2020/03/17 21:19:58 (permalink)
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Blown Head Gasket

I have a 23hp Briggs Vanguard that blew a head gasket on #1 cylinder, there's also a burn mark on the head and cylinder. I'm wondering how much "burn" a new gasket will stop and when I should consider resurfacing the face on the head and cylinder.

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    Roy
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    Re: Blown Head Gasket 2020/03/17 22:56:16 (permalink)
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    Welcome! Lay a straight edge across the burn mark, there should not be daylight showing. If there is try cleaning it up with a block and emery paper.
    CaptPete
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    Re: Blown Head Gasket 2020/03/18 16:00:11 (permalink)
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    Roy
    Welcome! Lay a straight edge across the burn mark, there should not be daylight showing. If there is try cleaning it up with a block and emery paper.


    Thanks Roy, a straight edge doesn't show any light but I can feel it with my fingernail, do it's not too deep. I also used a good gasket with a thin film of grease and tightened the heads back on for a leak down test - I'm showing only 20% leak on each cylinder. This tells me that if I flatten out the burn mark using your suggestion, I should be good to go. What grit would you recommend I use to finish the clean-up?
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