Viking overheating - Yamaha Viking Forum
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post #1 of 40 (permalink) Old 01-18-2015, 08:44 PM Thread Starter
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Viking overheating

Ok, I have to know, is anyone else having issues with the Temp light coming on while out and about?


My wife follows us from mud hole to mud hole and takes pics while we are running around on our quads and getting stuck. She is about as anti-mud as you can get so she rarely ever actually gets in the mud with us. When I took the Viking in for it's 20 hour service I noticed it was overheating (light coming on, fan running nonstop, Overflow bottle lid missing) so I asked them to take a look and see what the cause was. The dealer immediately said that the radiator was packed with mud (actually it wasn't, it was more or less dust that has gotten between the fins and looked like mud). They pulled the radiator, cleaned it out and then re-installed with fresh antifreeze/water. Everything was done under warranty, so no charge to me (props for a good dealer here).


Every time we have taken the machine out since, at some point during our riding, the overheat light would come on, usually for only a few seconds. A couple weeks ago (roughly 50 hours on the machine), the light came on and stayed on unless I took the machine and parked the rear practically underwater. The radiator was cool to the touch, but as soon as the engine hit water, instant steam cloud. Called the Dealer on their next open day and he said to bring it in and they would look at it. The next day he called me back and said that he had spoken to Yamaha directly and explained the issue and they informed him that when the machine overheats like mine did, it usually bends a pin in the thermostat causing the issue we were seeing. He ordered a new t-stat and we scheduled the service for the following Tuesday morning. He had the machine for a couple hours and he and I agreed that instead of Anti-freeze/water, we would refill with Engine Ice to add to the cooling capability. He assured me he ran the machine at idle for over 30 minutes and no temp light came on.


Took the machine out today for it's maiden voyage with the new T-stat and Engine Ice installed. About 2 hours into the day, once again, the temp light comes on. If the machine is sitting at idle, the temp light stays on (with the fan running non-stop). The minute you rev the motor the light would go out. Tried running the machine through water to cool it off, did nothing, literally 2 minutes after running multiple passes through water that was 2 inches above the drivers floorboard, the light was back on while idling and would go out seconds after the engine was rev'd (even if the revs were being done in neutral).


High temp today was 66 degrees with a feels like temp below that because of the wind.


Has anyone else experienced anything similar? Any ideas? I intend to call the dealer on Tuesday when they are open again, but I am at a loss. It almost seems like there is a blockage in the motor itself or something.
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post #2 of 40 (permalink) Old 01-18-2015, 08:56 PM
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Doesn't sound good, mine can sit and idle on a 40 C day without the light coming on, just a heap of hot air off the fan. Would it have air in the cooling system from the change of coolant? What about cracked head or blown head gasket from one of the over heats? Sounds to me like the first over heat was from the blocked radiator, the 2nd one from the jammed t-stat, and now maybe the head is warped, cracked, or gasket blown. Good luck, hope it works out.
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post #3 of 40 (permalink) Old 01-18-2015, 09:07 PM
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I'd say there is still air in the system. The first time maybe the radiator was dirty.
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post #4 of 40 (permalink) Old 01-18-2015, 09:43 PM
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Hot Rod's How to bleed the cooling system on a Yamaha Rhino 700 Vid
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post #5 of 40 (permalink) Old 01-18-2015, 10:39 PM
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Good info! I'm going to have to say it sounds like you still have air in the system.

In the video, I noticed you were using Prestone 50/50, is there anything special we need to know (brand/type) when adding anitfreeze?
Also, I haven't looked yet but I was wondering if there was already a place to add a water temp sending unit...I'm going to add a gauge.


Thanks

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post #6 of 40 (permalink) Old 01-18-2015, 11:03 PM
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never had any issues with prestone ...water ports always look clean...works for my big motor...dont like the way they look with the other types

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post #7 of 40 (permalink) Old 01-18-2015, 11:29 PM
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Quote:
Originally Posted by wvhotrodrhino View Post
never had any issues with prestone ...water ports always look clean...works for my big motor...dont like the way they look with the other types

Well that makes it easy! What about a place to add a water temp sending unit?


Thanks again!

2014 Viking w/Viking VI (NO SAG) shock upgrade
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Heat shield by (Blue Wolf)
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LED lighting (Baja Designs)
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Summit 28,000BTU heater
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post #8 of 40 (permalink) Old 01-19-2015, 01:16 AM
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Never had a problem such as you are experiencing. Could just be a bad senser. I'm surprised they didn't take a look at that.

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post #9 of 40 (permalink) Old 01-19-2015, 10:50 AM
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Originally Posted by mass-n-trash View Post
Well that makes it easy! What about a place to add a water temp sending unit?


Thanks again!
you want to put it in the drivers side rad hose..

James Davis
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post #10 of 40 (permalink) Old 01-19-2015, 11:18 AM
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I have never had my hot light to ever come on. I plan to add a temp gauge just for peace of mind. I live in Louisiana and when we ride it is usually very dusty or nasty muddy. About July of last year I told my BIL that I wasn't going back to the local ATV park unless it rained. Took 2 days to get all of the dirt out if my nose and eyes.
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