Heater Core...

New sympton. Went track racing and blew the pressure cap at 16lbs. I was thinking it was the heater cores but for some reason, my system is generating too much pressure. Can a bad thermostat cause this if the system doesn't overheat and looks normal all of the time.
 
New sympton. Went track racing and blew the pressure cap at 16lbs. I was thinking it was the heater cores but for some reason, my system is generating too much pressure. Can a bad thermostat cause this if the system doesn't overheat and looks normal all of the time.

:rolleyes: sounds like to me youve got blockage or something, or maybe a cracked head, or blown head gasket:shrug: