01XJ
Well-Known Member
- Location
- Pleasant Grove!
I bought a 92 full size blazer 5.7 and when i first got it it ran great and still does. When i first bought it had no heat at all, i checked the coolant and it was so dirty i couldn't tell if it was dex cool or the green crap that went rusty. My Guage always read just under.210. I did a full flush until the water coming out was crystal clear put a new tstat in and cap and filled it with the green stuff. I let it run for 30 min got the air out of the system but my guage was at like 60. All hoses were burning hot to touch but in still had no heat. I took it clear from orem.to af and back on the freeway and it never reached a 100deg. And still no heat. So i cut the hoses to the heater core and flushed the hell out of it and it was nasty. It had all kinds of crap. I did it one way then the other until the water was clean. Put it all back together toped it off and went for another ride. Temp guage still never over a 100 but a had some heat not much but it was warm only on low or med. High just blows cold. I have replaced every sensor on this car. Tps. Iac, coolant temp sensor the sensor that runs the guage you name it its been replaced. Full tune up fresh plugs wires, cap, rotor the whole works. I noticed thebwater pump leaking a little so i did it also. Why would my guage work before with dirty crap why do i still have no heat I'm at a loss. I know the guage works i grounded it out and it will go all the way to hot then bsck to cold. Any suggestions? Is it bad it only runs at 100 maybe 105 on a warm day. I can drive it miles and get out and open the radiator cap with no issues its cold to the touch. It's not leaking or losing fluid my tank and radiator are full. It runs like a raped ape i just can't fugue out this cooling system since i did a flush. Even the hose under the dash going in to the core is hot but i just can't get heat. Everything has been replaced, any help ideas would be great. Thanks in advasnce , jeff