jeremy7777

hi guys, ive done just about everything i can think of , ive replaced my heater core, put my hand on it when replaced still blew out cold air, so did away with the heater vaule and hooked up direct no heat, ran water through all the hoses to check if water was cycling, everything was fine, i have a 89 350 l98 with oil cooler water cycled fine, any suggestions, i cant understand why i have no heat, ??????? if anyone can give some ideas, thanks,

LottaBallsCamaro

Your thermastat may be stuck open. Does your car stay cool and then sometimes run up real hot? Camaros run a pretty high temp.

------------------
91 Camaro RS, 305 TBI
No mods yet...Hopefully:
Convert to dual-cat with headers and Borla catback exhaust.
Edelbrock MPFI system.
RAM air hood & Z28 wing.
Z28 cam.
ABS system.
Positraction rearend with rear disc brakes.
Rebuilt front and rearend suspension with polygraphite bushings.
Strutbrace.
Rollbar.

AlkyIROC

I'd also say thermostat. Pull the thermostat housing off and check it. It's either stuck open, missing, or sitting offset somehow allowing the coolent to bypass it. If you had heat before, then I'd go with the stuck open choise.

------------------
Stephen's racing page

87 IROC-Z Pro ET Bracket Race Car
383 stroker (carbed) with double hump cast iron heads and pump gas
454 Big Block buildup now in progress for the 2001 racing season

Best results before the 383 blew up
Best ET on a time slip: 11.857 altitude corrected to 11.163
Best MPH on a time slip: 117.87 altitude corrected to 126.10
Altitude corrected rear wheel HP based on power to weight ratio: 476.5
Best 60 foot: 1.662

Racing at 3500 feet elevation but most race days it's over 5000 feet density altitude!
Member of the Calgary Drag Racing Association

87 IROC bracket car, 91 454SS daily driver, 95 Homebuilt Harley

RB83L69

What are the other ends of your heater hoses hooked to?

https://www.thirdgen.org/messgboard/...ML/004184.html




------------------
"So many Mustangs, so little time..."

JJ

I've had the same problems as you with my IROC - my solution, I just parked it until spring rolls around. If I need to drive it, I would get fans wired on a switch a put cardboard in front of the radiator. Mine not only does not blow heat, it get so cold moving down the road that it runs like crap, runs like hell once it warms up however.

------------------
87 IROC, 350/5 speed. gmpp 350, vortec heads w/some work, XE268, 1.5rr's, 650dp, rpm intake, MSD ing., ect.
89 formula, L98.