exhaust rainbow slick
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=4625
Printed Date: December-21-2024 at 11:05pm
Topic: exhaust rainbow slick
Posted By: stang72
Subject: exhaust rainbow slick
Date Posted: August-27-2006 at 9:24am
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Well , I am finally getting some time to play around with the 62 cla$$ic...it has a newly rebuilt 312 ford Y block.
The water comming out the exhaust ports appears a bit fuely(if thats a word)...leaving a bit of a rainbow slick in the water or on the drive. No smoke though...??? If the carb is set up too rich could this be a result? I replaced the two longer sections of exhaust hose...the old sections were pretty slimmy inside with gunk and carbon build up. Did not replace the two sections that serve as elbows and curve up to the manifolds(they are in good shape)...I a$$ume there is gunk inside them too...could that contribute to the problem? The carb on this one is a side draft carter.....the engine fires right up, idles well and runs under load great. No issues other than the water that is ported out. Thanks in advance! ------------- stang Face plants are not that funny when it's you face! http://www.correctcraftfan.com/diaries/images/3720/photo1.jpg" rel="nofollow - The Super Air |
Replies:
Posted By: The Dude
Date Posted: August-27-2006 at 2:58pm
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Fuely. It may not be a word, but it should be. It's a lot easier than trying to describe a rainbow slick.
Wish I was more of an authority on this one. Outboards do this a lot and I've always a$$umed it was because they are running rich. But I really don't know. ------------- Mullet Free since 93 http://www.correctcraftfan.com/diaries/details.asp?ID=717&sort=&pagenum=1&yrstart=1991&yrend=1995" rel="nofollow - 95 Sport 1978 Ski Nautique |
Posted By: JEFF KOSTIS
Date Posted: August-27-2006 at 9:58pm
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Probably a bit of oil from somewhere than gas. You would of probably smelled the gas back there if it was. Just a guess....
Jeff.... ------------- 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: stang72
Date Posted: August-27-2006 at 10:12pm
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Maybe...I am scatching my head a bit...it does not take much oil to make a nice rainbow! I wonder where it is comming from??? The source! ------------- stang Face plants are not that funny when it's you face! http://www.correctcraftfan.com/diaries/images/3720/photo1.jpg" rel="nofollow - The Super Air |
Posted By: JEFF KOSTIS
Date Posted: August-27-2006 at 10:20pm
?????Fresh rebuilt engine not "broken in" yet and shes spillin a bit out the pipes??? Youre right, doesnt take much oil sor a rainbow. Does it do it all the time or just once, if all the time that would be another guess.
Jeff... ------------- 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: stang72
Date Posted: August-27-2006 at 10:24pm
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I have not run it a bunch yet(mostly in the drive and once on the lake)...ran it in the drive today and tuned the carb ...seems better. Maybe it needs to blow some crap out! ------------- stang Face plants are not that funny when it's you face! http://www.correctcraftfan.com/diaries/images/3720/photo1.jpg" rel="nofollow - The Super Air |
Posted By: stang72
Date Posted: August-27-2006 at 10:33pm
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Just thought of this(dah)...before I started it the other evening, I was adjusting the throttle cable and foot pedal...and moving fuel in the process....it was flooded when I first tried to start it, but today , I pumped it once and fired it up fine and it was better....even looked cleaner comming out. Maybe , fuel was dumped down the intake a exhausted out.
What do you think? ------------- stang Face plants are not that funny when it's you face! http://www.correctcraftfan.com/diaries/images/3720/photo1.jpg" rel="nofollow - The Super Air |
Posted By: The Dude
Date Posted: August-27-2006 at 10:55pm
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let's hope... keep us posted. ------------- Mullet Free since 93 http://www.correctcraftfan.com/diaries/details.asp?ID=717&sort=&pagenum=1&yrstart=1991&yrend=1995" rel="nofollow - 95 Sport 1978 Ski Nautique |
Posted By: 64 Skier
Date Posted: August-28-2006 at 6:55am
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Have you broke her in yet? ------------- 64 Skier 66" HO VTX and 67" HO Triumph http://www.correctcraftfan.com/diaries/details.asp?ID=1071&sort=&pagenum=3&yrstart=1971&yrend=1975 - 71CC |
Posted By: stang72
Date Posted: August-28-2006 at 8:01pm
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Not really broken in....maybe total of a couple hours or less(mostly screwing around in the drive)....but I am finally ready to get it to the lake! ------------- stang Face plants are not that funny when it's you face! http://www.correctcraftfan.com/diaries/images/3720/photo1.jpg" rel="nofollow - The Super Air |
Posted By: stang72
Date Posted: August-30-2006 at 9:05pm
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Ok...it is fuely and not oil. I don't know jack about the carb...but adjusting seems easy....idle screws and throttle.
It would appear to me that the carb is running rich and exhuasting a bit of fuel out. Does that sound likely? Other than that...it fires first crank, holds ilde well and revs fine and no hesitation under load. It's running well...but still a bit of rainbow on the drive. ------------- stang Face plants are not that funny when it's you face! http://www.correctcraftfan.com/diaries/images/3720/photo1.jpg" rel="nofollow - The Super Air |
Posted By: 79nautique
Date Posted: August-30-2006 at 9:13pm
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for a holley carb you need a vaccum gauge to adjust the idle mixture screws right, set for max vaccum. On a q-jet/edlebrock screw them in until the rpm drops slightly then back off 1/4 turn, need to do this several times until each side is exactly 1/4 turn. ------------- http://www.correctcraftfan.com/diaries/details.asp?ID=756&sort=&pagenum=1&yrstart=1979&yrend=1979 - 79 nautique |
Posted By: stang72
Date Posted: August-30-2006 at 9:22pm
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I wish it was a holley...try this one...2 carters with the side drafts.
Do you think if the carb is too rich I could see some fuely exhuast? ------------- stang Face plants are not that funny when it's you face! http://www.correctcraftfan.com/diaries/images/3720/photo1.jpg" rel="nofollow - The Super Air |
Posted By: The Dude
Date Posted: August-30-2006 at 11:47pm
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I still like your word: fuely.
How else could fuel get in the exhaust? ------------- Mullet Free since 93 http://www.correctcraftfan.com/diaries/details.asp?ID=717&sort=&pagenum=1&yrstart=1991&yrend=1995" rel="nofollow - 95 Sport 1978 Ski Nautique |
Posted By: stang72
Date Posted: August-31-2006 at 12:12am
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Gotta be dumpin a bit into the intake I figure! ------------- stang Face plants are not that funny when it's you face! http://www.correctcraftfan.com/diaries/images/3720/photo1.jpg" rel="nofollow - The Super Air |
Posted By: 63CCSN
Date Posted: September-06-2006 at 5:09pm
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My guess is that those Carters are dumping fuel. Those Carter side drafts are super easy to flood. As I understand them, there is a float needle that controls how fuel flows into a bowl and then the fuel in the bowl is atomized and sent into the intake. Those needles sometimes can get stuck , and the bowl overflows, and the fuel then gets dummed down the intake. The other thing that I have heard hapens with those is that, the bowl continues to fill up for a second or two after you turn off the engine and they over flow into the intake and is in there to go where it will until the next time you fire up the engine.
You would be a lot better off with a new valley pan, 4 barrel intake and a modern 4 barrel carb, say 450 to 600 cfm. Although you may be able to find someone that really knows those carbs and can get them adjusted and working good. Let us know how it is going for you. |
Posted By: stang72
Date Posted: September-06-2006 at 8:01pm
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Good info 63CCSN...that is what I am suspecting! People keep telling me to keep her original...I have been looking at the blue thunder intake...and adding a holley. ------------- stang Face plants are not that funny when it's you face! http://www.correctcraftfan.com/diaries/images/3720/photo1.jpg" rel="nofollow - The Super Air |
Posted By: bmiller
Date Posted: September-07-2006 at 7:40am
| I tried my edelbrock 600cfm on my 302, it flooded all the time,especially when it was warm.It would never hardly start.Put a brand new holley 450cfm,tuned it in and i've had a trouble free summer since. |
Posted By: 63CCSN
Date Posted: September-07-2006 at 9:33am
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stang72,
I just emailed you about those 312 exhausts from the general discussion page.... thanks again! The blue thunder is going to give you some more horses. Along with the blue thunder, you could add a multi spark distribution box and get a smoother idle and quicker response on the hole shot. I don't know what the motor box is like on your cla$$ic but the blue thunder and new carb would make the motor have a little higher profile than the side drafts carbs. As for the orginal vs. modern carbs/intake... on the Y block in the '63 Ski Nautique I am working on, I plan to save the side drafts. The blue thunder intake and new carb just bolt on... if I ever want to sell the boat and someone wants it to be orginal I figure I could give them the carters and orginal intake as part of the deal. In the mean while I want to have a great running boat to enjoy. Plus, I would say that the a new carb and intake set up would be safer. I don't really like the idea of fuel and vapor going where it wants to under the motor box, and in bilge. If you stick with the Carters and you want to try adjusting them, I think I have an orginal manual on them that I can photo copy and send to you. Let me know and I will paw through my junk and find the manual. |
Posted By: stang72
Date Posted: October-12-2006 at 7:37pm
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I was starting the winterizing process on this boat...when draining the manifolds, one drained a little oil....after all the water pa$$ed , there was about a half a thimble full of oil, That would explain the oil slick.
How would any oil inter there? ------------- stang Face plants are not that funny when it's you face! http://www.correctcraftfan.com/diaries/images/3720/photo1.jpg" rel="nofollow - The Super Air |
Posted By: eric lavine
Date Posted: October-13-2006 at 7:34am
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stang, dont rule out the trans cooler. ------------- "the things you own will start to own you" |
Posted By: stang72
Date Posted: October-13-2006 at 10:23am
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Eric...how can I check it? Never would have consider that...certainly could be a sourse! ------------- stang Face plants are not that funny when it's you face! http://www.correctcraftfan.com/diaries/images/3720/photo1.jpg" rel="nofollow - The Super Air |
Posted By: eric lavine
Date Posted: October-13-2006 at 7:54pm
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make sure your not loosing any trans oil, it may be low on the stick, if it is a borg warner the oil is low pressure cascading oil and usually will leak slower than a PCM in which that is charge pressure which will leak quickly. If you do suspect the cooler remove it and plug one end and put a air chuck in the other they are 3/8 pipe and pressurize to about 50 psi and then put under water, the rest is self explantory
------------- "the things you own will start to own you" |
Posted By: stang72
Date Posted: October-13-2006 at 11:22pm
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Eric...are you suggesting that the tranny cooler could leak a little into the exhaust manifold?
If so...would there be a presence of tranny fluid where the water exits the cooler(for that particular side)? If I pull the cooler off...would I feel oil in that location? Thanks! Any other ways oil could inter the exhaust? ------------- stang Face plants are not that funny when it's you face! http://www.correctcraftfan.com/diaries/images/3720/photo1.jpg" rel="nofollow - The Super Air |
Posted By: eric lavine
Date Posted: October-14-2006 at 8:11am
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actually it will run its coarse then out the back of the boat with the water thru the exhaust, sure tail sign will be your trans will missing some fluid ------------- "the things you own will start to own you" |
Posted By: stang72
Date Posted: October-16-2006 at 7:36pm
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Ran it for a while in the drive yesterday....drained the offending manifold and found again a small amount of oil. Have not taken the cooler off yet...before I do a couple questions!
The color mixed with water was mocha...would'nt tranny fluid be reddish? Dip stick shows no signs of water in the oil...a buddy suggested with the new rebuild and only a few hours...that you can get a little until blowing by the valves until they seat well...does that make any sense? ------------- stang Face plants are not that funny when it's you face! http://www.correctcraftfan.com/diaries/images/3720/photo1.jpg" rel="nofollow - The Super Air |
Posted By: eric lavine
Date Posted: October-17-2006 at 8:07pm
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probably not the cooler because your getting the oil or fuel only on one side, to be on the safe side since it is a new rebuild try a compression test on that bank and see what you come up with, any oil that enters the cylinder will usually turn into white or blue smoke so it wont be valve stem seals or broken oil control ring, if a valve wasnt seating as your friend said it would definitely show up on a compression test, I always stress compression tests for the same reason when you go to the doc's office and the first thing they do is check your blood psi. a compression test will answer alot of questions.....Is there any type of missess in the engine? also pull your plugs on that bank and tell us the condition, pay close attention to them eric ------------- "the things you own will start to own you" |
Posted By: stang72
Date Posted: October-17-2006 at 8:44pm
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Eric,
No misses...it runs smooth! Idles well. I did notice that the carb is leaking a little(looks like a connection line under the carb)....going to take it off and see what I find...it's a side draft carter and I don't know much about it...but the leaked gas goes down into the intake...so I would guess it is exhausting out too. I will check plugs and check compression. Thanks! ------------- stang Face plants are not that funny when it's you face! http://www.correctcraftfan.com/diaries/images/3720/photo1.jpg" rel="nofollow - The Super Air |
Posted By: 05 210
Date Posted: October-19-2006 at 9:06pm
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I think a leakdown test would be a much better indication of what is going on.A compression test will show a serious problem,but you may miss a minor one with the compression test.Also,if you suspect fuel has been entering the manifold unmetered,check the oil for gas contamination.If there is excessive amount of fuel in the engine oil you could wpie that motor right out.
Mike ------------- http:/diaries/details.asp?ID=2219" rel="nofollow - Air Nautique 210 Team 640 hours, not 1 regret |
Posted By: 8122pbrainard
Date Posted: October-31-2006 at 7:08am
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Did you rebuild the carbs? My 63 Dunphy X55 has the same engine with the side drafts. I love the low profile but the carbs give alot of people problems. You can't set the float levels by the instructions since one carb is going uphill and the other downhill! I wouldn't change the setup and destroy the engine hatch but that's the purest coming out in me again. Pete ------------- /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: stang72
Date Posted: November-04-2006 at 11:31am
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Pete,
The boat is winterized , but the carb is off...good time to rebuild! Where can i get a rebuild kit? Also...do you have any manuals for the side draft? Thanks! ------------- stang Face plants are not that funny when it's you face! http://www.correctcraftfan.com/diaries/images/3720/photo1.jpg" rel="nofollow - The Super Air |