new 05 warrior, venture overheat

[warrior63]

warrior, rs venture overheat.

Thanks for all the input! it is quite helpful. as I understand it there are three possible solutions, any of which may fix the problem or not. 1) check the concetration of the antifreeze 2) add ice scratchers 3) add a rear heat exchanger. It seems unusual that this appears to be related to only long track sleds and caused by not enough snow blowing on the existing heat exchangers conbined with greater resistance on the track causing the engine to put out more heat. Does anyone know if this is only a four cycle problem or is it related to two cycle engines as well?

I am not an engineer but it seems like this is a design flaw that should be at least addressed by the manufacturer. I am not sure I would have bought yamahas knowing this could be a problem. Thanks again for your help, I will be incontact with my dealer to consider the options. I am leaning toward the more expensive fix of a rear heat exchanger.

 

[Viper34]

Snowmobiles require snow to cool them down, because as you state, the trails were icey, that is a severe condition for a cooling system. Try getting off the side of the trail occasionally to get some fresh snow kicked up onto the coolers, that will also help the plastic smell, which probably is not your skiis, but the hyfax. Now, if you running on nice snow powder packed trails and your overheating, well then maybe you have a problem.

 

[LazyBastard]

Also make sure that the cooling systems are properly bled.

The reason why its a problem more for long tracks is that there is a crossover tube at the back of the tunnel. For the short track sleds, the tube is in the perfect place for snow to fly off the back of the track and hit it. For long track sleds, snow will miss the crossover tube.

It is NOT only a 4-stroke issue. All sleds require cooling.

 

[gnip134]

I was on this site before I took my Rage out.......added the rear cooler, checked coolant(almost 100% antifreeze) changed it when i put the cooler on....never had an overheating problem. Better safe than sorry.

 

[Boston RX1]

Also make sure that the cooling systems are properly bled.

The reason why its a problem more for long tracks is that there is a crossover tube at the back of the tunnel. For the short track sleds, the tube is in the perfect place for snow to fly off the back of the track and hit it. For long track sleds, snow will miss the crossover tube.

It is NOT only a 4-stroke issue. All sleds require cooling.

LB you made my day. I said something the you agree with. Now, I'm the guru.

 

[Boston RX1]

Just came back from a rip around the field with 4 inches of snow. I purchased the antifreeze tester. I had to get my glasses because the reading was off the charts, -45. The level was down a bit so I added straight distilled water. What is the best way to bleed the system. I have had overheating issues a couple of times, but if I never say the temp light come on again, it would be to soon.

 

[Sled Dog]

Guys the water wetter stuff works also but getting the coolant correct should also be done. Oh yea your ski's were not hot your hyfax or sliders in the track were and are for sre making more fiction which makes the engine work more which adds to overheating.

 

[JDKRXW]

Also make sure that the cooling systems are properly bled.

The reason why its a problem more for long tracks is that there is a crossover tube at the back of the tunnel. For the short track sleds, the tube is in the perfect place for snow to fly off the back of the track and hit it. For long track sleds, snow will miss the crossover tube.

It is NOT only a 4-stroke issue. All sleds require cooling.

LB you made my day. I said something the you agree with. Now, I'm the guru.

Sorry gentlemen, but that cross-over tube adds MINIMAL cooling capacity (it's only 15" long and 1 1/4" dia. at MOST). The reason most modern long tracks overheat is that GENERALLY, they have 2" paddles tracks with no studs. When riding on ice these larger paddles (a) hold the hi-fax further off the ground so they melt easier and (b) throw way less ice and snow at the FRONT exchanger so engine cooling is reduced even more than on a sled with a 1 1/4" track.

 

[Boston RX1]

Can't I have GURU status for a couple of minutes? No one was talking about 2" paddles anyway. We were all talking 121 and 136 RX1 and Warriors. I still think my theory holds water, no pun intended.

 

[Boston RX1]

What is the best way to get the straight anti-freeze out of the sled and get a better mixture in?

 

[Snowman269]

Also make sure that the cooling systems are properly bled.

The reason why its a problem more for long tracks is that there is a crossover tube at the back of the tunnel. For the short track sleds, the tube is in the perfect place for snow to fly off the back of the track and hit it. For long track sleds, snow will miss the crossover tube.

It is NOT only a 4-stroke issue. All sleds require cooling.

LB you made my day. I said something the you agree with. Now, I'm the guru.

Guru's you are, snow misses the crossover pipe completely. I overheated 3 times in 2000 miles. I believe these sleds are engineered too close to maximum efficiency for weight reasons. Us real world users must be pushing beyond Yamaha's testing standards. Add the cooler!

 

[NY_Nytro]

What is the best way to get the straight anti-freeze out of the sled and get a better mixture in?

Take the side panel off and remove the lower end of hose that runs vertically right behind the oil container. Doing that you will lose nearly a gallon.
Or you can suck out coolant from the res. and add distalled water. But I think it would need more than just a couple minute idle to get it fully mixed before you can check it again. I short ride would probably be better.

 

[LazyBastard]

Sorry gentlemen, but that cross-over tube adds MINIMAL cooling capacity (it's only 15" long and 1 1/4" dia. at MOST). The reason most modern long tracks overheat is that GENERALLY, they have 2" paddles tracks with no studs. When riding on ice these larger paddles (a) hold the hi-fax further off the ground so they melt easier and (b) throw way less ice and snow at the FRONT exchanger so engine cooling is reduced even more than on a sled with a 1 1/4" track.

You would be surprised to find out just how much cooling can be done by a WHOLE ROUND pipe that is constantly covered in snow.

At 1 1/4" dia and 15" long, thats nearly 60 sq in of cooling area. Always covered in snow.