Viper Treats
New member
Last winter I asked a question about an overheat on my viper. Everyone seemed to think I had an air lock. I finally got around to bleeding it this weekend. When I pulled the bleed screw on the rear exchanger I saw some small bubbles come back up into the reservoir. It didn't seem like much, the bubbles only came up for a few seconds, but wondering if you guys think if that was enough to cause the problem.
Thanks.
Thanks.
Did you ever touch your heat exchangers? If they were all warm then the little bubble isn't the problem, if they were cold and now they all get warm you found the issue. 
I have heard time to time people say watch your sled they will over heat. I have drove through all kinds of conditions. I have only seen the temp light once. It was the first day I had it out. The key is proper dealer setup with the air bleed out. I added a some Water wetter last season. That keeps the temps good and low when riding into spring.
Viper Treats
New member
kinger said:Did you ever touch your heat exchangers? If they were all warm then the little bubble isn't the problem, if they were cold and now they all get warm you found the issue.
They were warm when I was doing the bleeding, so I think they were warm before I pulled the rear bleed screw.
Viper Treats
New member
NB-VIPER said:
The problem didn't start until 7200 miles until I lost a heat exchanger from a stud, saw the temp light once before that, it is not a set-up issue. Thought maybe the dealer didn't bleed it properly. Won't know until next fall, but I would like to get it fixed before then.
If they are warm then you have coolant flowing so its not air locked.
Viper Treats
New member
Not sure what to do next. Talked to a friend that used to be Hauk's mechanic he said sometimes the gear that drives the water pump slips on the crank due to an improper fit from the factory. Anyone ever heard of this? Maybe a dirty carb is causing a lean jug, but I would have thought it would have toasted the cylinder. Other suggestions?
Thanks.
Thanks.
There is a tech bulletin on this, ask you dealer.
yamaholic22
Active member
yes it has happened before that the gear does spin on the shaft from improper fit
yamaholic22
Active member
like everyone said, if the exchangers are all getting hot there is no air lock and it is pumping coolant. Go start it and let it run for 10 minutes, and see if the exchangers are ALL getting hot, but make sure to watch the temp light, not that it gets hot and you don't notice it right away.
Viper Treats
New member
yamaholic22 said:
The light only comes on during heavy loads. That is why I was thinking it could be the pump gear slipping, only slips when it gets really hot.
I will check all the exchangers, I am sure the light will not come on doing this, but I will watch.
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