Boats For Sale:
Replacing heads. Gasket advice needed |
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Formula50 
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Joined: January-17-2014 Location: Europe Status: Offline Points: 31 |
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 Posted: November-24-2014 at 12:50am |
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Thanks so much for the help. Sounds like the marine gaskets will be the better choice. Might cost a little bit more though, but we'll go with these.
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Gary S
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Joined: November-30-2006 Location: Illinois Status: Offline Points: 14096 |
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Posted: November-24-2014 at 3:53pm |
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I ran my automotive head gaskets for 20 years. When I changed my heads to p's I used PCM head gaskets,that are about 31 bucks each,only because I was sourcing parts before I did the job and had no idea how the old ones held up.If you look at Summit,marine head gaskets are actually cheaper than automotive. The rest of the gaskets other than the exhausts I cannot imagine being any different than automotive ones
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8122pbrainard
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Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41040 |
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Posted: November-24-2014 at 5:09pm |
Other than the word "marine" commanding more $$$. 
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Formula50
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Joined: January-17-2014 Location: Europe Status: Offline Points: 31 |
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Posted: December-03-2014 at 1:23am |
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Well, we ordered the gaskets. Went with Fel-Pro Marine gaskets, as these weren't overly expensive. Can't go wrong with these i guess.
Got almost all the parts we need for our head swap! Getting ready to order the exhaust bolts. Could anyone confirm these are the same length as the automotive ones? Can't really imagine them being any different, but you never know. |
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MrMcD
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Joined: January-28-2014 Location: Folsom, CA Status: Offline Points: 3594 |
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Posted: December-03-2014 at 4:48am |
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Most of the exhaust bolts I have seen use an Allen head to gain extra clearance. There is very little room for a bolt on the marine exhaust headers. I have had two 351W's, a 1978 and a 1995, they both seem to use the same type Allen head bolt, sorry I don't know the size.
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TRBenj
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Joined: June-29-2005 Location: NWCT Status: Offline Points: 21113 |
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Posted: December-03-2014 at 7:22am |
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Most likely not the same exhaust manifold bolts. In addition to being Allen heads for clearance, they're also longer since we have thick cast iron exhaust manifolds. Get the PCM ones or source yourself the same length black oxide bolts from McMaster or the hardware store.
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Gary S wrote: