Coolant Boost Pumps

[Bob_n_Cincy]

Red race car engine number one: Blown head gasket due to pushing the limit of boost on a 175k mile engine. If you watch the video where that car blows coolant out of the rad cap the temp is just barely over 200 degrees, not enough to boil over but it blows the cap due to compression leaking past the gasket into the cooling system.

Jim,
When this red car blew its head gasket, I see 2 numbers on the video that are out of wack.

The boost pressure was above 40 psi. I read somewhere that the vacuum hose going to the wastegate got melted and caused this. Is this correct?

The other number was the "air intake temperature" above 200 degrees.
The stock sensor is right after the air filter so I know it wasn't located there.
Was the AIT sensor located before or after the intercooler?
Thanks,
Bob

PS. Thanks for explaining that the thermostat was gutted. That explains why the motor was slow setting up to temperature.