opz28

This is my first Corvette, a 1991, but I have noticed that it runs pretty hot unless I'm moving pretty good down the road. After reading some posts, I've come to the conclusion that it's normal. I don't think it ever gets above 220 or so, but it's right towards the high end of the gauge. Thats also running around town and not on the highway, cools fine there.

Anyway, what I found is that when I turn my A/C on while driving around town the coolant temp goes down several degrees. Is this normal or am I just seeing things? I thought that running the A/C would make it run hotter not cooler. Is there something I don't know?

Mike

86PACER

It cools down because your fan kicks in when you turn the AC on. Same thing when you move, as the radiator is getting incoming air from the front. Everything you have described is normal. If you don't like it that hot, they sell low temp fan switches that turn your fan earlier.

opz28

Cool, thanks for the input, I learned something today

Lichen

It's normal until you reach the temperature where your fan would kick on automatically. Then (in theory), the AC would make it run hotter. You might consider installing a 180* t-stat and programming your fan to kick in at 195*. If not, you're still okay.

BADDUCK

You don't need to do anything.

RRT vette

except

vinnies87

Not necessary, your cars running at normal temps, nothing to worry about till you hit 240 deg plus...

89 Bob L

It sounds normal. However, if you want to do some preventative measures. Check the air intake area for debris. In addition, you can check between the radiator and a/c. After a while leaves, street garbage, etc. build up in that area. It is a fairly straightforward to do, you can do it yourself, and doesn't cost you any money. Check other posts, some guys have pictures of what they found. Very interesting to say the least.

opz28

Thanks for the help guys, everything seems to be normal I guess. The radiator looks clean, no debris, so I'm just going to drive it

woodi

How do I reprogram my 92 lt1 so my fan kicks on at 200??

thanks

Lichen

Unfortunatly, you can't. You can either have a new chip burned to turn them on earlier, or buy one of those manual fan switches.

CFI-EFI

The radiator looks clean...Where? You can't tell if you have debris between the radiator and condenser with a casual glance. The first inspection should be done by pulling the radiator. If it hasn't been done before you WILL find debris. Maybe in your case it isn't a problem. Until you pull the radiator you will never really know what you are looking for. Then, you can determine if successful future inspections on your car will be possible without pulling the radiator. The trouble with looking and seeing no problem is, is there really nothing there, or can you just not see it. After you have pulled the radiator, you will know what you will be looking for, next time.

RACE ON!!!

dan_pirkle

My 92 scared me first time in traffic but the LT1 was designed with the sole purpose of making you worry about over heating. Anyway I did a full flush on my radiator and got in there and really cleaned out the front debris and it runs about 10 below what it did before. What appeared to be a very well maintained car otherwise had been VERY neglected in the cooling department.