lol.... my first taste of coolant was when i was a young nieve kid and i took off one of the radiator hoses after driving for about an hour..... my first taste of oil was when my friend decided to start refilling the oil as i was putting on the oil filter........

im glad i had one, i just run the heater hoses from the water pump to the heater core, then form the core to the intake, no problems at all. no cencors excapt, oil, temp, vacume, and fuel, all i need, oh a a tach so i know how fast im going.

yes im glad i have an 82 . yea my brothers broke afew days after he had his 91 z28. i had to go to the scrap yard and 5finger the thing and then i get home and he put it in and then went and bought a brand new one.

this may be a stupid question but ill ask anyways just incase.

when i have the defog on, the heat blows really good and hot, but when i turn it to vents, it just blows cold. is that because it actually is a vent and takes air from outside or my car is busted. AND how the hell did the heat work without a HCV in my 84 z28? Or is it just constantly flowing.

can you give some more details??

umm.. not really..

when the defoger for the windshield is on, and i have the heat all the way up, its hot, normally. But when i turn it to vents (so its blowing at my face) its cold, even with the heat all the way up., is it supposed to do this or not.

i think theres a vacume line or a switch that controls the flap or whatever it is that directs the air from the blower motor thru the heater core

ok, from easiest to hardest...

1. check the heater diverter valve mentioned in the begining of the post. look at the vaccuum like and check the vacuum line on it.

2. take out your hvac and check the vac. lines behind it. check for leaks.

3. check your lever on the back of the Hvac and see if the clips are connected.

geeze i wish i saw this post about 2 weeks ago... i wass checking my oil and tranny when one of the post snaped off while the car was running. i didnt even think about replacing it when did the engine. it shot antifreeze all over my engine and me i was so mad... that dam 14 piece turned a day of hard work, i had to change the flywheel dam piece of **** cracked, it to just pure agravation. it exptied all the antifreeze out which made it really easy to chage... he he...

i dont have an hvac. i think... is it possible to not have any vacuum lines either... cause i dont know if i have even seen one in my car..

PLEASE! Somebody post a large warning on one of the main pages on this subject. I have read several posts here wherein people say they actually got burned by moving the heater control valve. Well the SAME THING happened to me on my daughter's 92 RS. I was looking into an overheating problem and saw a small leak. When I moved a heater hose, YEP SAME THING! the D*** thing blew up all over me! Hot antifreeze AIN'T NO FUN! Pleqase someone of authority, POST a Warning. THANKS!

I have already replaced this valve last winter when i rebuilt the motor, but the new one appears to be leaking, i really hate the clutter this adds to my engine plus how much harder it makes it to remove the passenger side valve cover. i had thouhgt about relocating it but if i can just remove it all together and bypass it that would be great. I already removed the A/C.

Jim85Iroc : do u have any pictures of what u did to bypass it? to my understanding all i have to do is run a hose from the front of my intake to the firewall and run the other hose from the radiator to the firewall, is this correct?

thanks

Matt

84Z, yeah, you don't have one of these diverter valves. I don't either. Started in '87. Your coolant path is like mine, constantly flowing thru the heater core. Have you checked your coolant level lately? If you run really low on coolant, you won't get heat out of the heater, even though the engine temp gauge will be at "hot". Think of a BIG pipe with a trickle of water running through it... that's "low on coolant". The big pipe's representing your heater core.

Hey guys, thanks for the advice razor, mine was overheating bad till i changed mine, but now its burning a lot of coolant while im driving, any ideas? it looks a bit like its coming from the a/c.. i could jus take my a/c out, which i kinda wanna do anyways, but i jus wanna know if anyone else has seen this before i go and rip stuff apart. thnx guys

i would start a new topic for the last half of your post. you'll probably get more responses that way.

:hail: IROC-Z

thats ok, i think i figured it out... im replacing my gasket for my thermostat tomarrow, that should fix it rite up.. looks like that was where it was coming from... thnx tho

damn double post

This is one big topic. My 82 didn't come with one(that's already been covered). The only advantage is the possibility that the AC 'might' work a little bit better without flow through the heater core. Keep in mind that when you switch to a/c no air is circulated through the heater core, so no heat is added to the air coming out of the vents. However, the heater core is in close proximity to the path the A/C air follows, so some heat may transfer. IMO, having the valve looks as though it's more of a problem than it's worth. Ditch the valve and you will have one less thing to worry about.