Riser Gunk
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=12531
Printed Date: September-29-2024 at 5:38pm
Topic: Riser Gunk
Posted By: vondy
Subject: Riser Gunk
Date Posted: December-16-2008 at 2:22pm
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So I was winterizing my Mustang the other day. Drained the engine and port side manifold. Went to drain the starboard side manifold and no water came out. Don't know if drained with the other manifold or at some other point, hose, etc. ????
Anyway I had the engine running before hand and water was definitely flowing from the exhaust. I stuck a nail set in a bit to see if there was a clog. Still no water but definitely some black gunk in there. Is this exhaust buildup? Is it something I should worry about? Pull apart and clean? Thanks guys! ------------- http://correctcraftfan.com/diaries/details.asp?ID=4645&sort=&pagenum=1 - 69 Mustang HM |
Replies:
Posted By: Waterdog
Date Posted: December-16-2008 at 4:19pm
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The water passage in the exhaust manifold should have rusty water in it, not exhaust! I'd pull it off and look at the exhaust ports on the head. Check out the exhaust that I cut open and sent to Allen (81 nautique) it's in his blog under General "Torque & HP" on page 3 I just bumped it to the top of the page. ------------- - waterdog - http://www.correctcraftfan.com/diaries/details.asp?ID=3896&sort=&pagenum=2&yrstart=1978&yrend=1978" rel="nofollow - 78 Ski Tique |
Posted By: vondy
Date Posted: December-17-2008 at 1:58pm
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Nice cutaway Waterdog.
Guess I'll pull the riser off and take a look at the manifold sometime before the season. Does anyone know if the water jacket extends throughout the riser or does it end at the end of the manifold? ------------- http://correctcraftfan.com/diaries/details.asp?ID=4645&sort=&pagenum=1 - 69 Mustang HM |
Posted By: 8122pbrainard
Date Posted: December-17-2008 at 3:33pm
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David,
Yes, on the H/M manifolds, the waterjacket is internally ported from the manifolds directly to and through the risers. At the very end of the risers is where the water is dumped into the exhaust. I feel you should be taking a real close look at the condition of the manifolds and risers. They are noted for burn through problems. How's you oil? Any signs of water? When water enters the exhaust side of the manifold, sometimes you will get water back into the engine and then into the oil. Didn't you have a problem with this at one time or am I not remembering correctly?? ------------- /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: Gary S
Date Posted: December-17-2008 at 4:55pm
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Pete,I don't think his boat has the HM's anymore
Well it turns out I'm wrong,in his prepurchase pic's there they are. My manifolds have two plugs each in them .One is in the manifold side and goes into the waterjacket.The other goes into the riser and is in the exhaust portion.I'm wondering if he has only found the one rear most plug.Maybe Alan who has a set off the boat can take pictures. ------------- 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: vondy
Date Posted: December-17-2008 at 5:47pm
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I have not noticed any water in my engine oil. Just changed it and seemed OK.
There are two plugs. I pulled the ones closest to the front because they were easier to pull compared to the back ones. I drained earlier before Thanksgiving and water came out of both manifolds/risers. Is there any problem pulling the risers off the manifolds? I assume I'll need to use a gasket sealer to reassemble? Yes Gary, still have the HM's. ------------- http://correctcraftfan.com/diaries/details.asp?ID=4645&sort=&pagenum=1 - 69 Mustang HM |
Posted By: Gary S
Date Posted: December-17-2008 at 7:20pm
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[QUOTE=vondy]
I drained earlier before Thanksgiving and water came out of both manifolds/risers. Is there any problem pulling the risers off the manifolds? I assume I'll need to use a gasket sealer to reassemble? QUOTE] You'll just have to make your own gaskets.I used brass nuts when I put mine back together,so if I do have to take them apart again,I'll have no problems.I have never gotten water from my riser side plugs.So it might be worth checking. ------------- 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: 74SkiNautique
Date Posted: December-21-2008 at 3:55am
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we wanted to take our risers off, but the back bolts dont have enough room for a socket head, or even a combination wrench. any ideas?? Its the pcm marinization. ------------- 74SkiNautique |
Posted By: SNobsessed
Date Posted: December-21-2008 at 11:53am
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74 SN - Mine had allen head screws, which were relatively easy to reach. Are yours hex head? Whoever put those on must have had a way to tighten them. A ground down open end maybe? ------------- “Beer is proof that God loves us and wants us to be happy.” Ben Franklin |
Posted By: 81nautique
Date Posted: December-21-2008 at 1:59pm
Vondy, Couple of points here. Yes the front ones drain the water jackets, the rears go through to the exhaust cavity and there's no reason to drain there unless there is a problem with water entering but you stated there isn't so I wouldn't even touch those back drains. Not sure why the backs drain holes are even there but I refitting one side to accept an air/fuel sensor for carb tuning later. Second caution is if you are not having any leaking issues do not try to separate the risers, You'll be opening a can of worms. As Gary states you'll have to make your our gaskets but that is the least of your worries. I'm currently refurbishing a pair of HM's and they have been a nightmare every step of the way. First, took me forever and a lot of heat to get the nuts to move and three of them were previously rounded, no way to get any grip on them. Even if I could get the nuts off I still could not pry the riser off as there was so much corrosion in the riser through holes so I had to hacksaw them apart and then drive the old studs out with a drift. Then had to drill out and retap the studs. Also we've found that these castings are incredibly brittle and when I removed the drain cocks most of the threads came with them. They just seems to want to keep falling apart, I had to use a few helicoils and also repair the threaded drain holes with aluminum braising rod then drill and retap. I had no choice but to repair these as they were leaking but I would caution you about fooling with your set unless they have to come apart. They will certainly test your problem solving skills.  ------------- You can’t change the wind but you can adjust your sails |
vondy wrote:Posted By: 8122pbrainard
Date Posted: December-21-2008 at 3:22pm
They are probably just there to hold the core during casting and then just plugged. Not many air/fuel sensors back then - maybe only in the factory lab!! ------------- /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: 79nautique
Date Posted: December-21-2008 at 7:47pm
replace with allen head stainless steel once you gget the old ones out, but just use a good quality box end wrench, Snap-on, Matco, borrow one if you have too. Craftsman seem to have a thicker wall due to cheaper metal I guess but I wouldn't try grinding down a onpen end wrench it will just flare and round off the head and you dead in the water then. ------------- http://www.correctcraftfan.com/diaries/details.asp?ID=756&sort=&pagenum=1&yrstart=1979&yrend=1979 - 79 nautique |
Posted By: vondy
Date Posted: January-02-2009 at 4:08pm
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With all the holidays I have not had much time to think about this issue. It started running through my mind again during an 8 hour drive back home yesterday.
The safe bet would be to not touch it. I'm all for that. Although I do recall a slow drip from this joint. Now that does not mean that the water jacket has a hole in it. It could simply be the gasket at the joint is failing. What do y'all think? ------------- http://correctcraftfan.com/diaries/details.asp?ID=4645&sort=&pagenum=1 - 69 Mustang HM |
Posted By: 8122pbrainard
Date Posted: January-05-2009 at 8:32am
Unless you split the risers from the manifolds, you really can't tell what is causing the leak. It could be a gasket, a hole from corrosion or the mating surfaces corroded. Take a look at the picture of Alan's manifolds again. It's very typical of what you will find with aluminum. Lots of corrosion. It's like aluminum tie rims in snow/salt parts of the country - hard to keep air in them!! ------------- /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: jbear
Date Posted: January-06-2009 at 3:15am
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Sorry...thread jack...
Pete; Where ya been? I was missin' ya. For a while there what with you gone I felt like the oldest guy on here. Glad you're back. john ------------- "Loud pipes save lives" AdamT sez "I'm Canadian and a beaver lover myself"... |
Posted By: 8122pbrainard
Date Posted: January-06-2009 at 7:31am
John, I was up you northern Wisconsin for Christmas and New Years. I need my annual fill of lake activities when the water changes state to a solid! Drained and winterized the house and won't go back up again until the boats will enjoy the liquid water again. I trusted you to keep the younger group here in line while I was gone!! ------------- /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: jbear
Date Posted: January-07-2009 at 3:32am
I tried! Sounds cold up there... BTW: Only way to enjoy water in its solid state is in my Beam and Diet Coke. john ------------- "Loud pipes save lives" AdamT sez "I'm Canadian and a beaver lover myself"... |
Posted By: 8122pbrainard
Date Posted: January-07-2009 at 8:37am
It only dropped below zero once so it was on the warm side! You mentioning the cold and Coke reminded me that when talking to Billy the other day, I forgot to mention a little fact that I doubt he's every thought about (or anyone else in the south!). Outside soda vending machines in the north need to be heated in the winter!!! ------------- /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 < |