Cracked Head |
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Delta Greg
Newbie Joined: June-28-2017 Location: California Status: Offline Points: 15 |
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Posted: June-29-2017 at 12:49pm |
I've got a 1993 Ski Nautique with a cracked head. I bought it that way because the previous owner didn't tell me it was cracked. He had JB Welded the head back together. The JB Weld seemed to hold for a long time, so I JB Welded it again and it seems to be OK for now, but I realize that I should probably be on the lookout for new heads. Just curious which heads to look for. I think my boat has the standard PCM 351W engine. Will the pro boss and GT-40 heads bolt right up? The boat has plenty of power now, but while I'm doing the heads, is it worth upgrading to better heads?
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TRBenj
Grand Poobah Joined: June-29-2005 Location: NWCT Status: Offline Points: 21171 |
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If just an external water jacket crack, that jb weld repair might last a very long time without issues.
GT40, or even better, GT40P heads can be swapped right on (and add 40-50hp). Head bolt holes on any 302 based head will need to be drilled out for use on a 351w. |
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Jonny Quest
Grand Poobah Joined: August-20-2013 Location: Utah--via Texas Status: Offline Points: 2957 |
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The GT-40P heads come up on Ebay constantly. Like Tim says, some of the GT-40 heads have different head bolt diameters. You want 1/2" diameter head bolt holes. Those heads that came off the 302 typically have the smaller holes and need to be drilled. Not a big deal and most head shops or machine shops can easily do it.
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2003 Ski Nautique 206 Limited Previous 2001 Ski Nautique Open Bow 1994 Ski Nautique Open Bow Aqua skiing, ergo sum |
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KENO
Grand Poobah Joined: June-06-2004 Location: United States Status: Offline Points: 11061 |
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here's a recent thread on GT40P heads if you happen to go that route and need to drill them out yourself.
Gotta agree with TRB on the epoxy repair. It might last a long time |
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