Manifold Repair ?
Printed From: CorrectCraftFan.com
Category: Repairs and Maintenance
Forum Name: Engine Repair
Forum Discription: Engine problems and solutions
URL: http://www.CorrectCraftFan.com/forum/forum_posts.asp?TID=2831
Printed Date: November-23-2024 at 7:40am
Topic: Manifold Repair ?
Posted By: skeebo
Subject: Manifold Repair ?
Date Posted: December-29-2005 at 10:21pm
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There is a small place on the underside one of the manifolds that may be starting to rust through. A small amount of water is starting to drip down from this rusted spot. Is there any way to repair this underside of the manifold? I have a 1989 PCM 351 engine. Thanks ------------- 1989 Ski Nautique 2001 |
Replies:
Posted By: 79nautique
Date Posted: December-30-2005 at 5:58am
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go to www.marineexhaustmainfolds.com and get a new set and ask for PCM brand instead of the osco mainfolds both are at the same price and get the hardware kit as well. Take the risers to a local machine shop and have them diped to clean them out and reuse them unless it has been used in salt water regularly then they need replaced as well.
If the mainfolds are rusting through in one spot they rusting in other spots that you cannot see or get to to repair. ------------- http://www.correctcraftfan.com/diaries/details.asp?ID=756&sort=&pagenum=1&yrstart=1979&yrend=1979 - 79 nautique |
Posted By: bwooton
Date Posted: December-30-2005 at 10:07am
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If the mainfolds are rusting through in one spot they rusting in other spots that you cannot see or get to to repair.[/QUOTE] A little money spent here is worth some peac of mind later. ------------- Thanks Bobby there's no replacement for displacement |
Posted By: JEFF KOSTIS
Date Posted: December-30-2005 at 7:55pm
Was the boat used in salt water?? If you stab the spot where it leaks, you can tell if its thin due to rust. Some split due to improper draining,(like my old engine where someone welded up the manifolds). Like the others mentioned, dont mess around with the old ones....... Buy new ones!! ------------- MUSTANG COUNTRY http://www.correctcraftfan.com/diaries/details.asp?ID=1074 - 1974 Mustang 17 http://www.correctcraftfan.com/diaries/details.asp?ID=1093 - 1976 Mustang 17 |
Posted By: tommer12
Date Posted: January-24-2006 at 4:32pm
| ah.. get some of the ol' J&B weld and try your luck with it! You never know.. could be the best $8.00 you spend to fix your small leak for now. |
Posted By: skeebo
Date Posted: January-24-2006 at 10:24pm
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It turned out to be a freeze crack that someone tried to repair, so I replaced it....thanks ------------- 1989 Ski Nautique 2001 |
Posted By: SMay81SN
Date Posted: January-25-2006 at 7:36am
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JB Weld will not hold up on the manifolds. It will burn off, manifolds get to hot. Been there tried that this past summer with a small hole in one of my 81 Nautique's manifolds. Quick Steel worked best! check out the post I did earlier this past year. http://www.correctcraftfan.com/forum/forum_posts.asp?TID=1904&KW=manifolds - leaking manifold ------------- Scott http://www.correctcraftfan.com/diaries/details.asp?ID=1383&sort=&pagenum=1&yrstart=1991&yrend=1995 - Our 94 SN |
Posted By: 79nautique
Date Posted: January-25-2006 at 7:46am
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Trying to batch a leaky mainfold isn't a wise choice at all. And if I was you SMay I would be replacing the mainfold as soon as I could otherwise you are going to find out why you don't want to batch them, while your rebuilding your motor after you find out why.
If it's rusted through in one place where is the next place going to be? somewhere easy to batch again or somewhere else where you can't get to, like the inner wall of the water jacket??? and then your trying to figure out why there's water in the cylinders and it's hydro locked??? ------------- http://www.correctcraftfan.com/diaries/details.asp?ID=756&sort=&pagenum=1&yrstart=1979&yrend=1979 - 79 nautique |
Posted By: SMay81SN
Date Posted: January-25-2006 at 7:59am
79 I know that...  if you had read my referenced post I did early in the summer. It was a temp fix so I could get through the summer till I could change the manifold in the fall or winter. We didn't want to miss any time on the water. Now the family and I are looking on upgrading to larger air Nautique!------------- Scott http://www.correctcraftfan.com/diaries/details.asp?ID=1383&sort=&pagenum=1&yrstart=1991&yrend=1995 - Our 94 SN |