View Full Version : Overheating after rebuild

06-23-2008, 09:10 PM
So I just got the engine back in. It had blown a head gasket so I did a rebuild with new rings and bearings and gaskets. It runs well but if I drive it hard it likes to try and over heat. I have a large aluminum radiator and new water pump. I took the thermostat out and it still tries to over heat when driven hard. I am not seeing any oil in the coolant and no coolant in the oil. No smoke out the tailpipe. The only things I can think of is to change my timing and maybe a step colder plugs but I cannot really see this making the engine over heat with no thermostat in. Oil pressure seems to be fine, 25 at idle and around 75 at rev. I am kind of at a loss. I have no fan shroud but have an electric fan and the clutch fan installed also. Any help or suggestions would be great, thank you.

06-23-2008, 10:07 PM
did you get the head shaved? Or at least get it checked?

06-23-2008, 10:51 PM
Yes head was rebuilt including resurfacing it. used ARP head stud, OEM head gasket with copper spray.

06-23-2008, 10:53 PM
Same thing happened to me!! Replace your coolant temperature sensor!!!

06-23-2008, 11:49 PM
Thank you, I will replace that and test it.

06-26-2008, 03:04 PM
this problem happened to my freind's car after rebuilt but the problem solved by put the fan shround back on.