Lee1

I Have a 94 4.9 and in the morning before I started the truck I took of the rad cap to depressurize the system and then put the cap back on, start the truck let it run for a min, open the cap and its full of pressure with cold engine. I just got my head checked and a new head gasket and I'm wondering if my block is cracked. Oh yeah I have white smoke in tail pipe in the morning but goes away and I'm not over heating. Any input would be much appreciated.

techrep

iTrader: (1)

most coolant systems are pressurized to 13 PSI

Lee1

Techrep, thanks for the reply. Should it have that much pressure(13psi) in rad on cold start/engine?

sylver91

Is you're thermostat stuck open or backwards?