View Full Version : gets hot from 2k-3k

06-12-2008, 08:07 PM
st165 that gets hot when crusing at 2k-3k RPM, it cools back down if i get on it or if i let it idle and also just cruse above 3k....

its a gen 3 head on stock gen 1 block and gen 2 ecu/adapter. stock ic core, constant run pump, large heat exchanger, k&n drop in, cutom dp and MBC @ 14-15 psi (.95-1.05 bar), stock temp thermostat(works good),cometic head gasket, new water pump... ya no clue why this happens

06-13-2008, 02:23 AM
would suspect the new water pump.

06-13-2008, 02:47 AM
thats what Im gettin at is the water pump, doesnt sound like its doin a good job of moving the water

06-15-2008, 01:31 AM
ah yes i had the same prob i replaced the rad cap... then it blew my water-pump seals... and shit i had to get greasy for four days... tip... check the compression.. might have a hairline in the head gasket....if not your pump or thermo is fucked do the thermo first... no improvement.....do the pump....if your scared to do it yourself your gonna get a new butthole at the local garage.... trust me i do it to people myself.....
also do the timing belt and reset your timing to the spec. im no expert but i do have to say.... sounds like a thermo prob.... can you run the heater? does that help?
get back to us on this one.....

06-15-2008, 01:33 AM
hmmn, no leakage anywhere? though?

06-19-2008, 08:37 PM
yeah no leaks and if it were a hairline or the HG starting to go it would be worse with more RPM and load, the only thing i haven't done is the rad cap. and the fact that after 3k it cools back down makes the pump not the issue for sure at least... still have the same prob till now and it sucks running the car above 3k all the time cuz gas is outrageous and the 3SGTE takes premiun

06-21-2008, 05:20 AM
thats an interesting prob... weird anywhooo.... find out whats up and get back us....

06-21-2008, 05:31 AM
how do you know for sure its not the pump? If the turbine became loose on the spindle it could not be pumping as much fluid, then when you hit higher RPM's it will create enough flow to cool off

06-21-2008, 01:28 PM
I suspect the water pump and or thermostat.