rear cooler for 136 Viper project Questions

1badz

1badz

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Nov 19, 2005
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Extending a Viper to 136" with an M10 and a 1.5 Intense. Will be using a 2000 and newer style Mountain Max tunnel extension. I'm assuming I can run a MM rear cooler from those years without any modification, except that I'm mating two different hose diameters? Correct? Is the SX rear cooler the same or does it need modification to change the direction of the inlet and outlet, or anything else need to be changed? I saw somewhere about cutting off the inlet and outlet and re-welding at a different angle. If this is required, who has this done and roughly what did it cost?? I have the large Viper rear cooler, which I'll be selling; not interested in running the tunnel extension necessary to cover it. This machine will not be piped and will not be studded. Anyone just running the crossover tube with a 136 Viper conversion WITH an M10. I find the M10 sleds I've had seem to run a little warmer. Thanks
 

Yes, the Viper hoses are 1", while the MM cooler is 3/4". I did not like the idea of restricting down the coolant flow. So what I did was cut the elbow's off the Viper cross over tube. Then cut the elbow's off the 00 MM cooler, opened up the inside diameter of the cooler with a round file to match the 1" Viper elbow's.
Then mounted the cooler in the tunnel, marked the elbow's at which angle I wanted them at. Pulled the cooler back off, and took it in to a local machine shop, and had the 1" elbow's welded on.
The machine shop charged me $20 cash if I remember correctly.
 
Thanks fellows. Anyone on the SX coolers? Different size ends or no?? Need re-welding for right angle or no?? Thanks
 
I have a question for ya.. My vmax just has a cross over tube stock. are you just adding a rear cooler because you need to when stretched to 136" or do the vipers have rear coolers originally?? I'm thinking of a 136 kit for mine this summer but I don't know if I need a cooler for the back to?
 
My 01 vmax was constantly overheating. I put an SRX heat exhanger on it. The SX is 3/4" and the SRX was 1". I just adapted them up. Some times a little restriction in a coolant system isn't bad. It allow the coolant to exchange the heat better.
 
just my .02 i would go the route of taking the time and making the tubes same diameter. if something goes wrong one less thing you have to worry about trying to retrofit. also i installed the rear heat exchanger in my viper when the update was offered, i never really had any issues but for $50 why not. anyways this year i put in expert x and stretched it to 136. i noticed right away that my running boards where running hotter than normal. in saying that i would think with just a cross over tube unless your in powder all the time you would have heat issues.
 
I would agree. Everything should be the same diameter. There is a reason the tubes are different sizes. My 01 doesn't have the temp gauge, like most don't, and it's always hot as it is now. So the rear heat exchager (cooler) is an option?
 
Am I right in thinking that the Mtn Viper will have the same size tubes as the short track Viper, and therefore the rear heat exchanger for the Mtn Viper would not require modification? I know that the Mtn Viper rear cooler is smaller than the optional Viper cooler, and it looked like it might work in the MM tunnel extension. Anyone familiar with this??
 
you are correct. On a side not the MM rear cooler will work, you just use the small hoses and heat them with a hair dryer, and slip them right on the bigger fittings on the running boards. It is a low preasure system so there is no restriction with the smaller cooler. I have it that way on mine and I run it hard all of the time, not light ever came on. Maxdlx
 
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