I've been searching but cant really find the answer i'm looking for....My question is this, what exactly is the function of the heater core and will a 87 GXL run fine w/o one or does it need it to be running good?

 

The heater core is an extra radiator with a fan that heats the interior. It can be bypassed... I crumpled one of the through the firewall fittings when swapping engines & used a 2 ft. piece of conduit & some clamps to bypass it. I get a low coolant alarm for about 2 minutes after cold start but then the alarm goes out & the engine is cooled normally. I will fix it when I swap motors again after rebuilding my original engine core. If you bypass the heater core your heat & warm defrost climate controls will not function at all.

Ramses666

 

hmm...cuz sum1 selling me a car and he said that the previous owner took the heater core out and that the car has a koyo radiator? so would it be fine if it didnt have one? If i didnt care if the car had a heater or not

 

Sure it would be ok if you can handle no heat.

Ramses666

 

Mine was bypassed when i got it, heater hoses were disconnected, and like any novice I reconnected them and had coolant all over my floor

 

no offense, but you kind've owned yourself on that one

 

Lol, I do that a lot it seems.

 

ok thanks guys