Vipers Overheating

D

downchild21

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Jan 10, 2009
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I have 2 vipers that the overheating light comes on at about the same time when the trail conditions do not have a lot of loose snow and am wondering ;

1. when the light comes on is that a " must stop" and cool down immediately

2. what fixes it

Thanks in advance!
 
I've only had it happen once on my 03. I was crossing a lake with very little snow. I stoped and scooped up some snow to put on the running boards near the feet. This cooled it down and I was able to contine on until there was better snow to kick up into the heat exchangers.
 
Why, is this a problem on the Viper and not on the standard SX? My SX seems to run very cool I realize the Viper may have more hp. but the overall cylinder configuration is the same. If this is common on Vipers does Yamaha have a service advisory to the dealer?
 
sx

Because the sx have a rear heat exchanger and the viper not, but it´s a smaller one than the srx rear heat exchanger that´s normally used on the viper.
 
I went out today with 3 03 Vipers, 2 were ERs and the 3rd with just rev. The only sled out of the 3 that did not over heat was mine. All 3 have rear heat exchanges with the temp around 15 degs and packed snow. I ask the same question does the viper have a history of over heating even with the rear heat exchange. On my sled I just added the rear heat about a month ago and bleed the system. My brother and my sons had the heat exchanges on already. Could the system need to be bled or could it be old anti freeze? I will also ask the same question when the light comes on do you need to pull over right away or due you have some time?

Thanks
Pup
 
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temp light comes on vipers around 194 to 230F,so that's getting hot,i would pull over or find pow immediately..

like i said before vipers are strange animals some over heat some don't,the
cooling systems aren't the most efficient from what i understand and can't
tolerate low snow conditions for long.

bleed system very well and use a 50/50 mix at most..and the rear cooler
IS a must.
 
Thanks daman. My sled seems ok since I bleed it. I will change the anti freeze in the other 2 and then bleed them and see how that works.
 
If you have a Viper you need to look at the bulkhead exchanger it is the only sled that has one inlet and TWO outlets. coolant doesn't flow in a curcuit like all the other liquid cooled yammys. I hope I'm not confusing anyone but just take a look at the bottom right of the bulkhead exchanger and you will see the "Y" this causes the coolant to bypass the rest of the heat exchangers.that means that there is two paths and like hydro it's going to take the path of least resistance. I have but a complete SRX cooling system with heads on my 03 and no rear exchanger and have had no problems. It's cheeper and works better
 
Interesting...my 2 vipers lights went on within 2 minutes of one another today...how big a job is the SRX cooling system change out ?
 
So you went out and bought a cooling system from a srx and installed it? Can you tell me what and where is the bulkhead exchange?
 
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Can anyone tell me which direction the coolant flows? Also could you remove the thermostate for better coolant circulation?
 
I wouldn't remove the thermostat I would just look in the classifieds for a srx exchanger and snatch one up bleed the system and run 50/50!!!!!
 
Both sleds that over heated today had rear heat exchangers on them. Could it be old coolant and it needs to be bleed?
 
One other scenario not discussed is the ice shelf that begins to form over the front or rear exchanger. This only happens with very cold temps. This ice shelf prevents new snow from coming into contact with the cooler. When I punch the ice shelf it breaks off but will reform in just several minutes when I see my temp gauge increasing with temp. Have not found a solution and its only happened a couple of times when in Quebec at very cold temps.
 
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