Boats For Sale:
overheating problem |
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Messer 
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Joined: May-28-2007 Location: United States Status: Offline Points: 63 |
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 Topic: overheating problemPosted: August-13-2007 at 3:06am |
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Did you have a spacer on the tranny cooler? I looked at my hoses and I have a 1" coming from the deck but the tranny cooler is a 3/4". There is a ruber spacer to offset the sizr difference. It's causing me issues.
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Johnnie
1987 Ski Nautique 1981 Fish Nautique 1980 Fish Nautique 1979 Fish Nautique 1986 Master Craft 1984 American Skier |
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Rinautique76
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Joined: July-15-2007 Location: United States Status: Offline Points: 20 |
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Posted: July-25-2007 at 1:11am |
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no well this is my second attempt at gettin this boat running first time did a engine rebuild that dint go right so the trannt cooler was over looked last winter
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ron benoit
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The Dude
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Joined: October-19-2004 Location: Houston Status: Offline Points: 1334 |
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Posted: July-24-2007 at 2:34am |
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there's a little drain plug in my tranny cooler for that very reason. I bet it gets missed a lot. Glad you got it fixed Ron
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Mullet Free since 93
95 Sport |
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79nautique
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Joined: January-27-2004 Location: United States Status: Offline Points: 7872 |
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Posted: July-24-2007 at 12:43am |
no it wasn't drained before winter and froze and busted the seem. |
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Rinautique76
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Posted: July-24-2007 at 12:19am |
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yea where the tranny cooler is seamed together at the top and bottom the bottom seam was opened up as if there was a poor weld in the factory and it caused to suck alot of air
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ron benoit
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The Dude
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Posted: July-23-2007 at 2:19am |
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a "tear?" in the hose? there was a leak in the tranny cooler?
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Mullet Free since 93
95 Sport |
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Rinautique76
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Posted: July-23-2007 at 2:08am |
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problem found seam around tranny cooler had a tear new cooler runs right at 160 thanks for all the good ideas and help
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ron benoit
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8122pbrainard
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Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41040 |
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Posted: July-17-2007 at 9:51am |
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Eric, What happened to you making it out to GL? We missed you!
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eric lavine
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Posted: July-17-2007 at 9:40am |
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sometimes the raw water pump seal will pull air through it, as said earlier it is easier to pull air than water. If you can with another hose run water to the seal area while running and see if the temp drops, this will allow you to pull water in at the seal instead of air
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"the things you own will start to own you"
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stang72
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Posted: July-17-2007 at 1:55am |
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Check the simple stuff first!
Have you checked the strainer? If not pull the hose off the end and take a look! Last week I ran it in the drive(no probs) and then took it out on the lake and right away saw my temp shoot up...picked a clump of grassy crap out of the strainer and all was good. |
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backfoot100
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Posted: July-16-2007 at 5:27pm |
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The slightest leak will cause it to suck air and not water. The hose pushes water through the engine where the pump actually has to suck it. I replaced all my cooling hoses a year ago. Had exactly the same issues you're having right now. It turned out that the tranny cooler was dented on end of it so it was essentially "D" shaped instead of round. I had to pull it off and I took a socket that was just a little smaller than the inside diameter of the cooler inlet. I had to tap the socket into the end that was dented to push it back out again. Worked fine since then with no issues. To this day, I have no idea how that cooler got dented.
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When people run down to the lake to see what's making that noise, you've succeeded.
Eddie |
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Rinautique76
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Posted: July-16-2007 at 4:45pm |
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i have tried a simalar method and it is not pumping as much as it should also i found a slight leak in tranny cooler
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ron benoit
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bwill14
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Posted: July-16-2007 at 2:52pm |
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I would still run the raw water pump test. I did mine with the boat in the water. If you want to do it on land, I would recommend a slightly different way.
In the water, take the hose that goes from the raw water pump to the therm off at the therm housing. Have it ready to go into a 5 gallon bucket. Start the boat and get it to 2500 rpm. Time how long it takes to fill the 5 gallon bucket. Should be around 20 seconds or less. If on land, take the water inlet hose off the hull of the boat (right where it is sucked in from the underneath). Fill a 5 gallon bucket with water and put that hose in the bucket. The pump should empty that bucket in the same time frame at same rpm. Keep us posted. |
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Brent
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racintj
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Posted: July-16-2007 at 11:23am |
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Same problem with my rwp recently. You are most likely pulling air from somewhere. Water hose pushes the water to it, but when you are at the lake...the rwp has to pull it. It is much easier for it to suck air from a leak than to pull a 1 inch column of water. From the water pump, move back checking each joint all the way to the hull. Make sure your hose clamps are in good shape and are the right size. Make sure that the hoses are in good shape. If you have to (some may kill me for this), run a small amount of silicone around each joint to ensure sealing. You may have a blockage or impeller problem, but most likely you are sucking air. Hope this helps. Boatdr., 79, and others will probably jump on today to offer some more help.
Tim J |
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Every day above ground is a Good day.
Lakeland, FL |
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8122pbrainard
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Posted: July-16-2007 at 7:51am |
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76, It sounds like you are sucking air from someplace.
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Rinautique76
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Posted: July-15-2007 at 9:43pm |
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if i turn around and put hose in a bucket it bubbles telling me that the pump is in the right direction
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ron benoit
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8122pbrainard
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Posted: July-15-2007 at 9:38pm |
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Yes.
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Rinautique76
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Posted: July-15-2007 at 8:54pm |
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what water pump the raw water pump
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ron benoit
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8122pbrainard
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Posted: July-15-2007 at 6:58pm |
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76, The water pump has fooled the best!! Can you turn the hoses around and see what happens.
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Rinautique76
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Posted: July-15-2007 at 5:50pm |
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im at a loss of ideas right now
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ron benoit
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The Dude
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Posted: July-15-2007 at 5:43pm |
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Ron, a lot of the regulars who are really good on this sight are at the CCfan.com reunion in wisc this weekend. I'm sure by tomorrow you'll see many other answers to this. You're definitely not getting water in your system. It's almost got to be the water pump doesn't it?
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Rinautique76
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Posted: July-15-2007 at 4:39pm |
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ok put thermostat in and now is overheating even on the garden hose can someone please help me im about ready to sink this thing
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ron benoit
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Rinautique76
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Posted: July-15-2007 at 12:49pm |
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anyone else have an ideas this has been a 3 year project and im so close but so far
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ron benoit
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Rinautique76
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Posted: July-15-2007 at 12:18pm |
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no i have not tried that yet should i do that while in the lake or on the hose
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ron benoit
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bwill14
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Posted: July-15-2007 at 3:17am |
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Did you check to see what kind of draw you had on the raw water pump? (taking hose from pump off therm housing) That would help eliminate air getting sucked in (strainer, hose, trans oil cooler).
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Brent
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Rinautique76
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Posted: July-15-2007 at 3:06am |
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yes i doubled and tripple checked that possibility
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ron benoit
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bwill14
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Posted: July-15-2007 at 2:57am |
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Are you sure you put the raw water pump back on the right way. It seems it would be easy to flip around.
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Brent
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Rinautique76
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Posted: July-15-2007 at 2:53am |
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impeller is in good condition risers get pretty warm as well
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ron benoit
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The Dude
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Posted: July-15-2007 at 2:44am |
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Ron,
Sorry to hear your trouble. Perhaps the pressure from your garden hose is high enough that it is forcing water through your engine (mine will when it's not even on full blast). But it sounds like your water pump is not working. I'm not an expert at this and I don't know how much you are (however if you can install an engine you ought to know a lot more than I do about this). Have you checked your impeller? There is a thread right now on clogs in the cooling system too (here. Perhaps it will be helpful in getting started. Places I'd start would be water pump/impeller problem/thermostat.... Other guys will be more helpful soon...welcome to the forum...this is a great sight. Also, make sure you post some pictures of that great boat! |
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Rinautique76
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Posted: July-15-2007 at 1:37am |
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ok im new to the site and i have a big problem i just installed a crate 351 engine in my 76 nautique when it is running on land with a garden hose the temp is fine around 170 but as soon as i put it in the lake it starts over heating and head right towards 240 now i have checked the impeller and installed a new thermostat im at a loss can anyone help
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ron benoit
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Rinautique76 wrote: