hi all having problems with heat on engine of ktm, radiators full clean and working properly same as thermo fan i looked at the oil and at one stage it smelt burnt and was almost boiling. i want to know if im better going down the road of an oil cooler or trying to modify the raditor system
all suggestions welcome
Bleed the air from your radiator/cooling system as per KTM Owners Manual Page 69 & 70 with the front of your Quad raised and by opening the bleeder on top of the cylinder head...if your water pump is air locked or cavitating it will not move the fluid to the rad for cooling...I think we will not be able to trust the Dealers on all the small things like this for a couple of years anyway....
Is your fan on when it is running hot? or is it off? you could have a faulty Thermoswitch on your rad...they are cheap and you can get at the auto parts store just take the one you have and they will order for you...here is a few lower temp that we might could get to work for the Katoom...
Run a larger jet or raise your needle and richen your fuel/air mixture
I am waiting on PWR to make a larger Radiator...Been looking at Honda 400EX Oil Coolers (Cheap and Easy to get)...also I think Protech makes larger Impellers for LTZ Water Pumps and I am waiting on that too...
Finned Inline Cooler:
Pull the Thermoswitch (Its on the side of the rad) that cycles the fan on/off for cooling and I am sure you can find one with a different a lower temperature IE the stock one on my LTZ is 180°-off to 190°-on I bought one that switches the fan on at 185° and off at 176° - fan runs more, but cooling is important for Hp while racing (These are approx values I can't remember the exact numbers)...they are different colored switches I took a green out and replaced with a purple so I know there is different designations - UPDATE according to Owners manual the Katoom already has this switch I will look for something a few degrees lower hopefully....
These are all the same products below (Surfactants we call them soap, but there are many different types and if you compare the charts on all of them they are the same)) A few cap fulls of this will help scavenge the heat away from your cylinder...antifreeze sucks for cooling all's antifreeze does is raise the boiling point of water and keep your engine from freezing...Straight Water is better than ALL antifreezes for cooling...A surfactant with water is better than straight water, read up below and you will see on the chart how much of a difference they make...don't put too much only a few capfuls into straight water or reduce antifreeze to only 33% (Use Engine Ice or Silkolene ProCool) and add Water Wetter thats what I do...I run Silkolene Procool with Water Wetter...I run it in my Freightliner also and the temp is 15° cooler running down the road now than it was from the factory...if you want a HOT engine run Evans Coolant or regular antifreeze it is thick hard to circulate and will run hotter!!!!
Only use Distilled or Deionized water in your rad...Deionized is better
Royal Purple: Purple Ice
Extensive testing confirms Purple Ice reduces coolant temperatures better than similar products. For example, the average operating temperature of a 350 c.i.d. V8 engine (equipped with 160° thermostat) when dyno-tested with different coolants are:
A.Standard mix of water and glycol (antifreeze)228°FB.50 / 50 water / glycol mix with Purple Ice added222°FC.Straight water (no corrosion protection)220°FD.Water with Purple Ice added200°F