Got a 4.7 liter on a 2003 GC, and the petcock is plastic, I have turned it 90 degrees counter clockwise and that is all that it really wants to turn, but no fluid is coming out. The radiator cap is open so it isnt that. Anyone drained and flushed one of these yet and has any advice about how far it needs to turn, I am afraid to torque it at all since it is plastic and I have no desire to have to intall a new radiator since I over torqued the stupid petcock. Thanks (From someone who really needs to go buy a shop manual.)

[QUOTE=mccoy]Got a 4.7 liter on a 2003 GC, and the petcock is plastic, I have turned it 90 degrees counter clockwise and that is all that it really wants to turn, but no fluid is coming out. The radiator cap is open so it isnt that. Anyone drained and flushed one of these yet and has any advice about how far it needs to turn, I am afraid to torque it at all since it is plastic and I have no desire to have to intall a new radiator since I over torqued the stupid petcock. Thanks (From someone who really needs to go buy a shop manual


Hi, does it have a plastic handle on top that u turn to open it. On
my 97 it has a hex that you turn with a wrench to open . dale jeepman600@aol.com :2cents:

turn it 90 degrees like you did and you need to pull it out and then it turns a little more

twist and pull