I recently purchased a rn from the x with a 62t motor in it. It has an old school r/d pipe, ported cyclinders, msd, alum water box, stock shaved head. Rode it for the first time and it didnt over heat but ran on the hot side. So i decided to go dual cooling and an girdled head from wamiltons. Just got it back together and it ran hotter than it did before. I was tryin to save my self from pulling off the exhaust manifold. So one cooling line runs straight to the pipe and the other to the bottom of the exhaust manifold( which is located in the middle of the two cylinders). The two brass fittings coming out of the head i y them together and then to a bypass out of the boat. I rode it like this and it still ran to hot. So i restricted the bypass hooked to the two lines coming from the top of the Head to a 3mm hole, i just tried to ride it again and it got overheating hot in maybe 3-5 mins of riding.been messing with this for weeks now and def need some suggestions. Dont know if i have to drill and tap the manifold or hopefully just re route the lines a different way. Or maybe i hav another issue??? Thanx for any help.
Super Jet Over heating. Cooling issues?
- Thread starter Stang0182
- Start date
Freakrider
X247
- Location
- Tampa Bay area
I have found that my cylinders run cooler when I run both water lines into the exhaust manifold, the pipe runs hotter of course but it is ok. The front cyl runs aprox 15 degrees cooler so that water line goes to the pipe.
It sounds like you are running parallel cooling. The motor is still only getting one line for cooling by the sounds of it. What pipe do you have? Any pics?
To run dual cooling you need to tap 2 lines into the engines cooling circuit and 2 lines out and over board (with one cooling the exhaust on its way out).
To run dual cooling you need to tap 2 lines into the engines cooling circuit and 2 lines out and over board (with one cooling the exhaust on its way out).
oxnard111
Creative RE Purchasing
- Location
- so Cali, Ventura/Oxnard area
How exactly do you know it is "over heating"?
Are you judging this by the temperature coming out of the bypass fittings? Temperature of pipe?
How were the cooling lines configured before you added the second cooling line?
I had been pulling my hair out trying to figure out a cooling problem I was having. Turned out to be a little tiny rock lodged in one of the 90 degree barbed brass fittings on my pipe.
Are you judging this by the temperature coming out of the bypass fittings? Temperature of pipe?
How were the cooling lines configured before you added the second cooling line?
I had been pulling my hair out trying to figure out a cooling problem I was having. Turned out to be a little tiny rock lodged in one of the 90 degree barbed brass fittings on my pipe.
I am checking temp at the head and cylinders. The last time i had it out head almost got to a point that it would sizzle water. I do have two lines plumbed from the pump, just one cooling the pipe and one coolin the motor hooked to the manifold. Its an r/d pipe pretty similar to a b pipe. Try and get some pics up just cant seem to send them from my phone. All lines are clear as thats the first thing i checked. I was thinking about running both cooling lines to the top of the head and using the fitting coming out of my exhaust manifold as the exit?? Good or bad idea??