This is very strange, My car will run perfect for about a week and the usually it seems to be Friday almost everytime it will get really hot...the whole cooling system has been replaced when I rebuilt the motor about 5k miles ago. new water pump, rad. 160 stat etc..All week it has ran 180 and not moved, now this morning when I was going to school it went to 240!? Im about to drive this damn car off a cliff, I love it but it just won't give up. I am stumped to as why it is doing this.....yes the air damn is intact, the electrical fans work good, I have a mech. temp gauge so its not the gauge.

...btw the fans are hooked up to a switch that I turn on when I turn the car on. And the heater core is bypassed.

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When your car is cold, take the radiator cap off & let the car get to the point where water is bubbling out of the radiator. You just might have some air trapped within the cooling system.

I had the same problem, and it only came back to haunt me once or twice a week.

Is it losing an coolant? I assume you have already checked for that, but it is worth asking about...

thanks guys, it ended up being the heater core....yes I was loosing coolant, I thought I had a cracked head which would not be good, but I bypassed the heater core and everything has stayed where its supposed to know...we have already had a couple 100* days here and it struggles to go over 180

yah. temperature sux in az. 103f today i think. my car overheats if the a/c is on. no matter what i do. i bought hi-perf. water pump, 180 stat, dual fans always on, new radiator.

i have jus learned to deal with the heat.
wish i could fix it.

Josh

Have you tried a big aftermarket radiator like a Griffin or Be Cool? The Griffin sure made a difference for me, but S. Fl. never gets as hot as AZ...

how much do one of those radiators run?

thnx

I bought the Griffin 31 x 19 universal GM from summit for $190. The Be Cool unit lists for about $450 or more in Summit and Jegs catalogs. The Griffin takes a little work to install, but only about an afternoon's worth of work. From what I understand, the Be Cool is a direct fit radiator.

i'm havingthe same problem everynow and thern i am really low on coolantand i just fill it up and don't think twice about it. i was vacuming my car about an hour ago and saw that there was a coolant leakinside the car. i was like WTF ,so i startd to take apart some of my car

wyclef, your heater core is bad.

Yeah, that happened to me once. I just took off all of the heater hoses and plugged the manifold. Not like I ever used the stupid thing anyway...

yeah i know, but how hard is it to replace cause it doesn't look to easy. also should i replace all the hoses that go along with it and hose clamps. how long wouldthis take a18year old kid to do whp has a good knowledge of cars but not evrything who is learning(me) al;so is there anything i should know before doing this.

it is a pain in the *** to replace, I am also an 18yo kid still trying to learn all that I can, your in ny so you prob need your heater etc. Im in az so I just took the hoses off etc and plugged the manifold also just like 92 zz did.

Its not the worst heater core in the world, but it does take some patience. A couple of long extensions, swivel sockets, and a good flashlight really help. Oh yeah, does your back bend backwards or do your arms bend in 6 places? Didn't think so. Well, you can access it from the pass. side foot well, but it is annoying. I wish I could give you more advice but it is a straight forward job, just in a bitch of spot. If you have a service manual read what it says to do and you will figure it out. Sorry to not be more helpful...

thanks guys, i apperciate it, its notreally leaking unless i have my heat on soi will picjk up the parts tommorrow and do te work on saturday. and i allready tookthe passager foot area apart so ican get a better look its just its a really tight spot.