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Old 08-19-2003, 09:10 AM   #1
Scooby Specialist
Member#: 26155
Join Date: Oct 2002
Chapter/Region: E. Canada
Location: Levis,qc,ca
2008 WRX 5dr
Dark Grey

Default 2.5 overheating, dunno what to do, please help !

I'm having problem with the 2.5 i put in my 93 impreza. the engine was OK before I did the swap, and now it's overheating. The head gaskets has been done, thinking it was the problem, and it was not. the thermostat is new, the radiator cap is new. what I can see is that, while the engine is running, air is getting in the system, forcing the coolant to get in the overflow tank, and when the tank is full, it's going out of the overflow tank. before I get the head gasket done, it was doing a weird thing when I would shut-off the engine while it was hot. after a few minute, the upper radiator hose was constricting, and the overflow tank was returning is the system after a few violent hose acting. after the head gasket has been done, It did not seem to do the upper hose thing, but I can see the lower hose is constricting while I rev up the engine, and I suppose no or little coolant can get thru the hose then. what the hell is going on ???? I'm supposed to do a pressure test in the cylinder soon. no crack where visible in the combustion chamber nor the cylinder liner when the engine was dissasembled
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