I recently got back my b18c5 motor. It was rebuilt with 9.5cr JE pistons, 84mm Sleeves and Crower Rods.
The problem is, that before the build-up, my motor never overheated..even with stock EJ Radiator. After the rebuild however, it seems to be overheating like crazy. There are no apparent coolant leaks, and I am even running an SI-R CandR Radiator.
If anyone has any opinions on what it might be, plz feel free to give me some pointers as to how I may be able to tackle this situation.

Thanks,
Aly

P.S. My motor is turbocharged...it was also turbocharged before the build-up.

 

I would recommend flushing then refilling with air bleed bolt open. You might have massive amount of air bubbles.

This is all I can think of besides thermostat, and switch unless you're throwing a code.

 

Thanks alot for the help..
No codes are being thrown, so it definetaly isnt anything to do with the engine.
Engine is running very strong.
I'll be sure to try the air-bleeding.