My freeze plug blew up in my truck,a compression check was done on the motor and it was fine. the freeze plug, valve gasket cover, spark plugs and wire, oil and filter,fan belt have all been change, the cylinder headswere resurfaced, but no pressure check was done,but no leak down test was done on the heads, #2 and #6 were full of water after truck put back and trying to start the motor. The truck has not actually ran since the freeze plug was blown
Do I need a new motor? Truck is aT1994 GMC Sierra 1500 on 1999 GMC Sierra 1500
by Violet in Hernando, MS on December 19, 2009
ANSWER by Valleyautotech on December 21, 2009
Did the engine freeze and blow out the freeze plug because if the engine froze you probably have a hairline crack in the head or block area thats leaking coolant into the two cylinders
ANSWER by Visitor on September 28, 2010
No, you do not need a new motor.