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GT40 blown head gaskets
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Bohinny View Drop Down
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    Posted: July-16-2012 at 7:37pm
Well I have found a problem not the original problem but this one is going to hurt. I guess last time out when the boat overheated I blew the head gaskets. I did the compression test and this is what I found #1 110psi #2 50psi #3 115psi #4 135psi #5 60psi #6 70psi #7 120psi #8 140psi. There is no water in the oil. Right after it overheated I pulled the plugs and they looked fine. Today I pulled them and 2 were wet and one was burned up. Any pointers would be great.
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Billy
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Bohinny View Drop Down
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Points: 74 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Bohinny Quote  Post ReplyReply Direct Link To This Post Posted: July-16-2012 at 8:32pm
This is a link to the first post
1995-gt40-miss-when-hot
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Points: 2421 		Post Options Post Options   Thanks (0) Thanks(0)   Quote GlassSeeker Quote  Post ReplyReply Direct Link To This Post Posted: July-16-2012 at 9:17pm
I feel for you, it appears to be time for a rebuild, you might search here for some threads on this since its not uncommon.
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Points: 21109 		Post Options Post Options   Thanks (0) Thanks(0)   Quote TRBenj Quote  Post ReplyReply Direct Link To This Post Posted: July-17-2012 at 10:56am
Blown head gaskets are one possible cause, but not the only one. Pull everything apart and see what you find. Its possible you cracked the block or heads as well.
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Bohinny View Drop Down
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Points: 74 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Bohinny Quote  Post ReplyReply Direct Link To This Post Posted: July-18-2012 at 9:47pm
Dropped of heads off at machine shop today. As suspected when I poured solvent down the intake ports it ran out the intake valves of the cylinders that had low compression.
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