I have a 2003 Yamaha Grizzly 660 quad. I use a forum to learn tips about this vehicle, too. Many guys run Engine Ice or Water Wetter in their Grizzlies to help them run cooler. I understand that these products, when added to your coolant, can decrease operating temperatures by up to 25%.


Do you know if there is a suitable product for our dmaxs? I recently went over the grapevine on my way to LA in 102 degree heat. I saw several cars pulled over with steam billowing out of their radiators. I jammed up the hill in level 3 (Edge Juice) with my AC cranking and had not problems (my fan clutch engaged, but I watched my temp closely--never climbed above 198). Even though my truck seems to do well in the heat, I'd love a product that would make things easier on it.


~Terel

There is no magic bullet here. You have to get the heat out and radiated and when you run a boost it is going to get a bit warm because with more power comes more heat which the cooling system was not really designed to handle. Your temps are fine for conditions. If you really want more cooling, you need a thicker raditor core for the extra pcwer.

Terel, I got an '02 grizzly 660, man they do run hot, seems my fan is running all the time in the summer!

Terel, I got an '02 grizzly 660, man they do run hot, seems my fan is running all the time in the summer!

A fix for this might be a bigger fan if it is possible. Might run a few degress cooler with synthetic oil too.

the water wetter will do the same thing in the dmax as it does for the quad. what it does is break the surface tension of the coolant letting it get better contact with the metal to transfer more heat. the only problem i have heard of is if you drain the coolant and let it sit for too long it will rust the motor fast. so when draining for repairs that are going to take a while drain and refill a few times (flush). it is said to be good for a 20-30* drop in temp.

Wow i never knew we had this many people rode here...I saw the pics and there's alot of guys who ride dirtbikes too.... I race atv's...and its def. fun...





About the cooling thing..I saw this stuff at Advanced and it was like Radiator Ice or soemthing..you add it to the coolant and lowers the temp..comes in a metal can..i dunno check it out...

the water wetter will do the same thing in the dmax as it does for the quad. what it does is break the surface tension of the coolant letting it get better contact with the metal to transfer more heat. the only problem i have heard of is if you drain the coolant and let it sit for too long it will rust the motor fast. so when draining for repairs that are going to take a while drain and refill a few times (flush). it is said to be good for a 20-30* drop in temp.


Rocksam,


Thanks for the insight. Do I need to be concerned about the formula compromising any seals or materials used in the cooling system (rubber, etc.). I can't imagine the materials in my dmax are any different than those used in my quad, but better safe than sorry...


Thanks,


Terel

Overheating is a problem with the grizzlys, but I have never had it happen. I run 15-50 mobil 1 in my grizzly and my harley, nice knowing the oil is not going to break down if she does get hot--and I only change those two toys once a season anyway so cost isn't a factor. Yamaha actually has addressed this with a "heat kit", comes with vented side panals, and insulation for the bottom of the tank, fuel lines and exhuast. I guess the problem is fuel boiling in the carb and or tank! My local yama dealer is a prick and wants me to let my quad sit at his shop until he gets to it!--so I haven't took it in--he does have a point--not all of them do it and if yours doesn't then don't worry about it.

the water wetter will do the same thing in the dmax as it does for the quad. what it does is break the surface tension of the coolant letting it get better contact with the metal to transfer more heat. the only problem i have heard of is if you drain the coolant and let it sit for too long it will rust the motor fast. so when draining for repairs that are going to take a while drain and refill a few times (flush). it is said to be good for a 20-30* drop in temp.

I would put this is same league as 50 MPG carb's.

Overheating is a problem with the grizzlys, but I have never had it happen. I run 15-50 mobil 1 in my grizzly and my harley, nice knowing the oil is not going to break down if she does get hot--and I only change those two toys once a season anyway so cost isn't a factor. Yamaha actually has addressed this with a "heat kit", comes with vented side panals, and insulation for the bottom of the tank, fuel lines and exhuast. I guess the problem is fuel boiling in the carb and or tank! My local yama dealer is a prick and wants me to let my quad sit at his shop until he gets to it!--so I haven't took it in--he does have a point--not all of them do it and if yours doesn't then don't worry about it.

Sounds like Yamaha focused and putting in biggest engine possible for marketing and made properly cooling is a secondary priority. I suspect in cooler weather it is not a problem?

Redneck45:


I had the heat kit you mentioned installed on mine (they're treating it as a recall, but the beware--the dealer will emphasize how important it is for you to have the valves adjusted and other maintenance, which is not covered under the recall). They're just sour about having to do all the work for free.


Mine never boiled gas (at least that I know). But if I don't keep moving, my fan kicks on all the time. I can tell it's running pretty hot. Next time I change my oil, I'm going to synthetic. I'm pretty well broken in now.


~Terel

Greg Landuyt at lubespecialist.com sells a waterless coolant which (he states) loweres the opperating temp and reduces rust and deteriation of the coolant system. I have not used it yet, but you could contact Greg and ask him. . .

terel, sorry i haven't beer here in a while. i don't think there would be any compatibility problems, i haven't tried it in my dmax. i did use it in my old bronco that had a 460 and it did help but it didn't help enough, never did figure out why that truck ran so hot. you can contact them at their web site www.redlineoil.com (http://www.redlineoil.com). they should be able to tell you about any probs.

terel, sorry i haven't beer here in a while. i don't think there would be any compatibility problems, i haven't tried it in my dmax. i did use it in my old bronco that had a 460 and it did help but it didn't help enough, never did figure out why that truck ran so hot. you can contact them at their web site www.redlineoil.com (http://www.redlineoil.com). they should be able to tell you about any probs.


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