bolt size
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=12216
Printed Date: September-29-2024 at 3:33pm
Topic: bolt size
Posted By: kapla
Subject: bolt size
Date Posted: October-21-2008 at 10:04pm
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I need to know the size of the bolts that fasten the riser elbow to the exhaust manifold. I think they come it to sizes two longer ones and two short ones. I need to replace them as i will replace the old gasket and the bolts are kind of frozen in there (already broke one, and left it in teher). So I'd like to finally replace that gasket and bolts. Any ideas on how to remove the bolt or how to make the new threads for the new bolts? ------------- <a href="">1992 ski nautique |
Replies:
Posted By: kevin719
Date Posted: October-21-2008 at 10:21pm
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If any of the bolt is sticking out you can use a bolt extractor,small pipe wrench,or vice grips. If it is broken off flush first try a punch with a point driving it into bolt at a angle so it will turn counterclockwise.If you are lucky it will work.If you would heat up bolt first it would be better.Or you can drill and use a easy out or just drill and tap(I would rather drill and tap because if the bolt is really stuck you take the chance of breaking off the easy out and thus a even bigger problem!!Good luck! ------------- kevinindy |
Posted By: Brktracer
Date Posted: October-21-2008 at 11:01pm
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Use a mig welder and weld a nut to it. Back it out while it's still hot.
Use a dab of never seize on the replacement. Matt ------------- http://www.correctcraftfan.com/diaries/details.asp?ID=3180 - 1976 Nautique |
Posted By: gun-driver
Date Posted: October-22-2008 at 12:25pm
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I just went through this process. Both my long bolts broke off, luckly there was just enough bolt sticking out I could get vise-grips on them. The first one came out just using the vise-grips and working it back and forth till it loosened up.
The other would not budge. I ended up heating up the manifold around the bolt just short of it turning red-hot and it came out fairly easily. Be careful to heat around the bolt not the bolt itself. If you heat the bolt itself it will get soft and snap-off again. |
Posted By: kapla
Date Posted: October-22-2008 at 3:01pm
Could someone show pics of the tools needed to pull out the broken bolt out of the thread as some technical words are hard for me to translate. I will also post tonight some pictures of the manifold situation, they are rusted in place where it conect the the cylinder heads, I think i will also remove them, and probably will have some more wroken bolts!!! but anyways whats the size of all the bolts involved in this task? ------------- <a href="">1992 ski nautique |
Posted By: behindpropeller
Date Posted: October-22-2008 at 6:14pm
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Get some PB blaster or AERO Kroil. Heat..then soak several times.
I think they are 3/8-16?? ------------- |
Posted By: kapla
Date Posted: October-24-2008 at 2:54am
you can see why i need to replace the gasket 
and this is the rust in the bottom of the manifold. pictured is the worst of the ports 3rd cylinder from drivers side 
scary huu ------------- <a href="">1992 ski nautique |
Posted By: eric lavine
Date Posted: October-24-2008 at 10:16am
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I use Brackets method, I will clean the broken stud and fit a nut of equal size over it, heat it to the point where it is ready to melt and the zap it with the mig welder while hot, let it cool then back it out. sometimes it takes a couple try's but it is effective. its last ditch if you cant remove with vice grips. its even been successful when the stud is flush. the key here though is heating the nut and stud when mig welding it ------------- "the things you own will start to own you" |
Posted By: 81nautique
Date Posted: October-24-2008 at 12:14pm
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Kalpa, Don't worry about the rust on the bottom of the manifolds, they all rust up like that. I haven't seen a paint yet that will not burn off of there within a few hours of running. I used high temp disk brake caliper paint and it didn't last, the factory applied paint is no better. I would bet powder coating would fair no better. Clean them up the best you can, shoot them with a quick coat of high temp caliper paint and slap them back on. Your already taking care of the important part by replacing the riser gaskets. ------------- You can’t change the wind but you can adjust your sails |
Posted By: 8122pbrainard
Date Posted: October-24-2008 at 1:08pm
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Kapla,
When you do get the risers off the manifolds, take a close look at the mating surfaces. With leaking gaskets, you will get corrosion that may require resurfacing. If not severe, people have done it themselves with just abrasive paper on a flat surface. If real bad, a machine shop can take a cut on them. Don't forget the "never seize" on the bolt threads for the next time!! ------------- /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 < |