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Posted by ChrisCase on Thursday, October 02, 2008 at 20:21:16 :
In Reply to: Timing Cover Coolant Leak posted by Tim Brake on Thursday, October 02, 2008 at 11:27:42 :
Water pumps push water into the block via that passage. Too much pressure means a restriction to out-flow. Isn't there a bypass hose on those engines? The 1" rubber elbow between the front cover and the manifold? And/or the heater hoses that act to let off the pressure?
Thermostats and radiator caps make maybe 15 psi. But pumps can make up to 60 psi if there is a resistance to outflow.