Originally Posted by lostsinker
Bad poppets usually result in overheating at low speed not high. You may have something else going on.
Lostsinker- Are you sure?
I thought the thermostat controls most of the low speed engine temp control with poppets closed, and at higher speed the poppet valves come into play by being pushed open by higher pump pressure so as to bypass the restricted thermostat passages to substantially increase cooling water flow .
So I'd think a bad poppet would either be stuck open and create excess low rpm cooling or be stuck closed and have no effect at low rpm but contribute to higher rpm overheat, no? No expert here, just asking.
Sorry , I can't help with the grommet and carrier issue, but the water passages may be too clogged for the poppets to be effective , or possibly there is a pump issue that is not delivering enough high rpm pressure?