I just replaced my head gaskets on my 2003 lb7 got the heads pressure tested,put it all back together only to find that its doing the same thing i did the waterpump recently to. the top rad hose pressures up and if i drive it hard at all it starts to heat up but there is never ant heat in the cab ive checked the heater core it fine. Im running out of cash pleaze help if you have any ideas. I would also like to say thanks for everyone who put up posts on changing the head gaskets i couldnt have done it without your help!