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Scott Calabro · 05-19-07, 09:50 AM

Pat,
It is possible that the head gaskets were installed 180 deg out. What I mean is that the gasket are marked "front". If they are not installed this way the coolant passages at the rear of the cylinder decks will be blocked, causing this problem. First do the compression test as Jac Mac says. After that maybe you want to pull the heads and see if the gaskets are installed correctly.

Best,
S

It is also possible that the water pump backing plate was not installed causing the pump to cavitate.

05-19-07, 09:50 AM	#6 (permalink)
Scott Calabro Scott Calabro Supporting Vendor Join Date: Oct 2006 Location: New England GT40: TS40 # 875 Posts: 856 Rep Power: 12	Re: Cooling System - Excess Pressure Pat, It is possible that the head gaskets were installed 180 deg out. What I mean is that the gasket are marked "front". If they are not installed this way the coolant passages at the rear of the cylinder decks will be blocked, causing this problem. First do the compression test as Jac Mac says. After that maybe you want to pull the heads and see if the gaskets are installed correctly. Best, S It is also possible that the water pump backing plate was not installed causing the pump to cavitate. __________________ TORNADO SPORTS CARS USA WWW.TORNADOSPORTSCARS.COM 413-977-4408 Last edited by Scott Calabro; 05-19-07 at 10:25 AM.