Been driving my LQ9 for about 2k miles now, and it seems like the system builds a lot of pressure when I get above the 4000 rpm mark. What pressure radiator cap should I be running with this thing? Ive got a 14-18 psi cap on my surge tank (which only purges after I've been in the high rpm's) and a 19-22 on the radiator. I decided to put a surge tank in because the radiator wasn't the highest point in my cooling system and I thought maybe since it was collecting air that's why it was building so much pressure. My hoses seem like they are bulging a little too much so that kind of was my main concern. Also this system runs at about 170* going down the highway, and only sees 210* when sitting in dead stop traffic. Fans kick on at 205* and off at 180*. I know that I have a 180* thermostat but shouldn't it be running at 200*-210*? By the way that's a water to oil heat exchanger for the trans that's sitting on top of the engine, so coolant runs through there and there is a steam vent from there to the surge tank as well. Thanks for any input guys!
11-06-2011, 06:25 PM
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