Quote:
Originally Posted by icefishingnut58
Well I took off the lines at the water pump and blew out with air 15psi as you mentioned. not much of anything came out. I blew with my mouth on the hose and it was not blocked could feel the air on the other hose. Im beginning to think that as you said take the cap off cold engine let get up to temp and rev the engine to 2000 rpm was all i would have had to do. because after i did that both lines are now hot. question the one line on the water pump is a single then the other one tees off to the heater core and the overflow tank. the hose to the heater looks like a plastic ring on it i tried taking it off there but wouldnt come off. so i just took off the whole tee and blew it out there. does that line to the heater core come off? thanks everyone for all your input! and have a great Holidy season!!!
gs 
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the hoses to the heater core at firewall do come off with a special tool to unlock the retainer..what happens is because of years of life they then leak...this then is another PITA expense ..
no need to do this just do as you did with removal at the engine...
remember at every coolant change blow/flush out the heater core...
good luck keep you toes warm !