Manifold drain cocks
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=51796
Printed Date: December-22-2024 at 5:20am
Topic: Manifold drain cocks
Posted By: ultrarunner
Subject: Manifold drain cocks
Date Posted: October-07-2024 at 12:30pm
| For those that have done it, can I see a pic of your setup? Thanks, Mark |
Replies:
Posted By: Jonny Quest
Date Posted: October-07-2024 at 4:34pm
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Mark:
On my 2 previouis boats with the 5.8 Small Block Ford, I used these: https://imgbb.com/" rel="nofollow">  I purchased them from McMaster-Carr: https://www.mcmaster.com/products/petcocks/drainage-valves-5/ I had one for each side of the block and one for the U-Bend (J-Bend) in the raw water system. I also replaced the cast iron plugs with brass plugs at the ends of the exhaust manifolds/risers. JQ ------------- Current 2003 Ski Nautique 206 Limited Previous 2001 Ski Nautique Open Bow 1994 Ski Nautique Open Bow Aqua skiing, ergo sum |
Posted By: KENO
Date Posted: October-07-2024 at 7:33pm
Here's a little light reading about exhaust manifold drains and corn flakes in the link below  http://www.correctcraftfan.com/forum/forum_posts.asp?TID=40857&title=exhaust-manifold-drain" rel="nofollow - link
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Posted By: wayoutthere
Date Posted: October-07-2024 at 9:35pm
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Question about this, if your installing drains on the rear of the exhaust manifolds, I noticed quite a large build up of silt on the 79 behind those 1/2 drive plugs, granted maybe from lack of service being an orlando boat. How about routing the cooling hoses to the rear of the manifolds ? My thought is it will always flush silt out and pop the hose off for winterization, like to know if thats an option good or bad. |
Posted By: uncle-buck
Date Posted: October-08-2024 at 4:29pm
I purchased a set of drains from SkiDim several years ago. One for each exhaust manifold, one for each side of the engine block, and one for the U under the thermostat. They have worked well.    ------------- 1990 Ski Nautique (original owner) PCM 351W with D.U.I. |
Posted By: TRBenj
Date Posted: October-08-2024 at 4:58pm
| I wouldn’t use those… can’t probe anything. Asking for problems. |
Posted By: Jonny Quest
Date Posted: October-08-2024 at 8:42pm
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I like the drain petcocks for the engine block and raw water J-bend. I agree with many that have voice opinions here that a "plug" at the end of the exhaust manifold/riser is a good way to go so that one can really flush out the gunk that can collect there. In the PCM / CC owners manual, it calls for flushing out of the exhaust manifold/riser with a garden hose on the front end and having the flush water exit the at the rear. JQ ------------- Current 2003 Ski Nautique 206 Limited Previous 2001 Ski Nautique Open Bow 1994 Ski Nautique Open Bow Aqua skiing, ergo sum |