[Rich in Vancouver]

I agree that it is best to remove the intake to fit the new thermostat rather than use the "Keyhole" method That gives you the opportunity to change the intake/head gaskets. On one of my V6s one of these developed a leak that would drain the system in minutes. If one develops a small leak the thermostat could be blamed.
When fitting a new pump I found that some of the mounting holes on the pump had to be filed for proper alignment.
I also fitted Viton seals to the cap on the expansion tank to replace the original flattened seals.
There has been no comment on the Kaiser metal thermostat housing. Opinions?