Dripping exhaust manifold
Printed From: CorrectCraftFan.com
Category: Repairs and Maintenance
Forum Name: Boat Maintenance
Forum Discription: Discuss maintenance of your Correct Craft
URL: http://www.CorrectCraftFan.com/forum/forum_posts.asp?TID=41337
Printed Date: April-27-2024 at 3:54am
Topic: Dripping exhaust manifold
Posted By: TurboZinke
Subject: Dripping exhaust manifold
Date Posted: June-23-2017 at 3:56pm
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Well 3rd post this week trying to get this boat into shape! I changed the impeller yesterday on my new to me 1987 SN 2001 with 351W. When I fired up my boat, just for a few seconds without water hookup, I noticed that it was dripping from the bottom of the exhaust manifold. Then I noticed that there is some kind of JB weld or something on the bottom of the manifold. The leak was slow, just dripping. The other side of the engine does not have any kind of sealant on it but it also was dripping from the manifold. I guess it has a crack in it too. Does anybody know of something like JB weld that is made for repairing these? Is a small drip that big of a deal? Thanks! Cy    ------------- Never miss a good chance to shut up ~ Will Rogers |
Replies:
Posted By: bb12
Date Posted: June-23-2017 at 4:04pm
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Just curious, but where did you buy this boat? What color is it? I looked at one last year when I was looking that leaked and had JB welded exhaust manifolds. ------------- 1989 Ski Nautique 2001 |
Posted By: spiralhelix
Date Posted: June-23-2017 at 5:19pm
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mine leak a little as well. exterior leaks aren't that big of a deal...the water is leaving the exhaust some way or another. However, manifolds that have cracks are more likely to develop cracks in the interior jacket which would be a very bad thing (water gets into the engine). I repaired mine with some JB weld as well that helped for about a month. I ended up keeping my eye out for boats that were being parted out and nabbed a pair. I then took them to a machine shop to have tested and resurfaced. I haven't noticed a change in boat performance or temps between the cracked manifolds and the non-cracked ones. ------------- -Spiral '89 Sport Nautique |
Posted By: 8122pbrainard
Date Posted: June-23-2017 at 5:27pm
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Cy, It sure looks like someone didn't or did a poor winter layup at one time and then tried a epoxy repair. The repair can work but it does take some prep like grinding out the crack which in this case it sure looks like it wasn't done. The big worry as mentioned above is an internal leak from the water jacket into the exhaust cavity. At the very least, the manifolds should be removed and pressure tested. You do not what water getting into that engine!! ------------- /diaries/details.asp?ID=1622" rel="nofollow - 54 Atom /diaries/details.asp?ID=2179" rel="nofollow - 77 Tique 64 X55 Dunphy Keep it original, Pete < |
Posted By: TurboZinke
Date Posted: June-23-2017 at 5:36pm
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Thanks for the help fellas, If I have an internal leak then it would be getting into the oil right? I changed the oil 2 days ago. I drained about 4 quarts and it did not appear to have any water in it. ------------- Never miss a good chance to shut up ~ Will Rogers |
Posted By: 8122pbrainard
Date Posted: June-23-2017 at 6:49pm
Cy, I still suggest pressure testing to be sure unless you just want to take the chance. That "repair" sure looks like a back yard hack job to me!! BTW, if enough water drains into a cylinder, you can also hydro lock and that can cause even more damage. ------------- /diaries/details.asp?ID=1622" rel="nofollow - 54 Atom /diaries/details.asp?ID=2179" rel="nofollow - 77 Tique 64 X55 Dunphy Keep it original, Pete < |
TurboZinke wrote:Posted By: KENO
Date Posted: June-23-2017 at 7:37pm
Sounds to me like you're dripping water after a few seconds of running the engine dry. Why don't you hook up the water and run it to see what you have for leakage, It'll probably be different Then after you run it for a while, you can check the oil and pull the spark plugs see if they're wet with water and turn it over with the starter and see if any water comes out of any cylinders. And, yes you can have water in the cylinders from internal leaks in the exhaust manifolds without getting it in the oil Any way you look at it you're rolling the dice. It's your call 
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Posted By: Gary S
Date Posted: June-23-2017 at 8:44pm
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+1 Here's an idea- Just go get new ones,they are still available. Some day they might not be,PCM does not seem to care about other Ford parts they made to convert them to marine use ------------- http://www.correctcraftfan.com/diaries/details.asp?ID=1711&sort=&pagenum=1&yrstart=1966&yrend=1970" rel="nofollow - 69 Mustang HM SS 95 Nautique Super Sport |
Posted By: Bri892001
Date Posted: June-24-2017 at 11:52am
+1 or at least start saving for them. Your NEW pair should last you the rest of the boat's life as long as you don't run in salt and properly winterize. |