Hello I have read a lot of post and plenty that sound the same I have been having a radiator resovor overflow problem but it is not as bad since I have replaced to a blackworks dual core and mishumoto thermostat it has never peged to red but will throw a code for over heat (I also have S300) so anyway I it rises top a little over half and then plains out and goes to normal I. Thought it could be the head gasket as well but no signs when I had a leak down test done at profunction in IL there the best I think. Alright so back to the over heat problem they did a leak down test everything showed normal well now I have a water pump leak and it only over heats every now and then and not in the red so my Q is could it of had beeen my water pump the whole time should I bother to do the head gasket? I would like to stay away from doing the head because I will end up buying new arp studs and everything else well I'm in there I just would like someone to tell me should I just to the timeing belt and water pump for now? Could this have beeen my problem the whole intire time. The motor is at 18 psi and has a recint tune head and sleaves arp head studs retaners wisico pistons oil cooled turbo stock intake bigger injectors greddy header aem fuel rail and fuel pump rods cam etc has been done in the past about 70k on the build just replaced radiator and thermostat stock fan was told that its good to keep stock fan for better flow thanks for taking the time to read this post I hope I get some educated idears thanks

 

Most water pumps have a little hole in them that will eventually start to leak when the pump is going bad. How long has it been since you replaced the water pump? I would do a water pump and timing belt. Its a lot cheaper than pulling the head.

 

thanks for the reply i believe it has been a long time since it has been done i am going to order the pump and belt today should i also order seals?

 

Ok everything has been replaced no leaks and now I'm still pushing out of the overflow should I replace the thermo again were do I go from here waterpump thermo and belt have been changed what should I do I need someone to help me out cuz my shop told me they can not figure it out... leak down came out good...help?