NorCAlly
Member
Symptoms: Motor running excessive water pressure, 10 psi at idle and up to 44 psi at 5k RPM, overheating occurs when ran over 5k RPM for short length of time. jimmyb suggested I look at the thermostats and poppet valve. I pulled the t-stats and both of them were shaved off by the previous owner to remedy overheating at lower speeds. I replaced with 143 degree t-stats and the engine started over heating really quick. I pulled off the poppet valve and cleared out debris and ran it again with the same results. jimmyb kept me focused on the poppet valve, I stared long and hard until I realized the seat (carrier and grommet) wasn't set all the way into the block, restricting the amount of travel the valve had to open. I pulled the old carrier out and noticed that it was warped and wouldn't seat right. I replaced it, using a high temp two part epoxy for extra holding power and peened it. Now running 2 psi at idle and 17 psi at 5k RPM. Thanks to all the guys at WAR 2006 and special thanks to jimmyb.
