I have an 86 trans am 305 fi i just rplaced the radiator and put in a new thermostat but it runs at 220- 240 and thats where it stays it does not go down past 220 but will go back up to 240 my fans are working and i put in new coolant when i changed the radiator. if you have any idea wat this might be please help.

Sounds like you replaced everything except the water pump,that can make a huge differnce,Im a huge fan of alluminum water pumps.

I had that exact color 87 trans am,(look in the official pics on the home page)anyway this is the pump i had on it and it ran very cool
http://store.summitracing.com/partde...5&autoview=sku
you prolly have a few blades broke of the impeller of the one your running now.
mine would run at a constant 180,what thermo stat did you put in it?

i have replaced the water pump about a year ago and there are no leaks comin from the car at all is there another way of telling if the water pump has gone out

Im thinkin it may still be working,but you may have a blade or 2 busted on the impeller,so it would still flow but not enough.what thermostat did you put in?

i put in a 180 superstat

Is the airdam present? does it cool down to 180 if your moving?

no its staying at 220-240

daymn thats hot,I feel your pain,check to see if your airdam is present and i would definatly try that proform pump,its tight. I noticed you only have a few post is this your 1st 3rdgen?

yea im only 18 ive put 29 lb injectors 58 mm throttle body turbo muffler and a jet stage two chip its pretty quick beat most the *****s out here you kno fun car

cool!,did you take advantage of all the "freemods" listed on this site? such has the tb bypass?? iIm tellin you,get that proform pump!!my 87 305 ran a consistant 180,and the fans hardly ever came on!

29lb injectors!!!??? wtf thats crazy huge,stock 305s have 19lbs,you may have a problem there.

sorry 24

is this 305 stock besides the mods you listed? did it run cooler before you put those injectors in? how long have you owned this car? did you put those injectors in?

i have had the car for a year and its the first time it has ran this hot i was goin up to tahoe and i thought my thermostst went out because i had changed the radiator a lil before i went up there and it was runnin a lil toasty goin up to tahoe and since then its been runnin the 220-240

make sure the thermostat isn't upside down.

do ur fans come on?

Here's a list of the things I would start checking:

1. Thermostat. Put the factory recommended thermostat in. Be sure that it opens or closes by putting it in a pot of boiling water on the stove. You can use a lower temp thermostat if you want, but I would not go below 180*.

2. Air dam under car. Check to see that the air dam is on the car. It is the lower spoiler in front. Sometimes these get damaged by tow trucks and parking blocks. Make sure it is pushing air upwards toward radiator.

3. Check to see front of radiator has no obstructions. Look for the plastic components that direct the air to the radiator behind the front bumper above air dam. It should look like a giant vent or air passageway directly to radiator.

4. Fill car up with coolant while running with cap for radiator off. Do this when car is cold and warming up to ensure all air bubbles are out.

5. Watch to see if fans come on when warmed up. If not, start checking for for electrical problem, switches, wires, or sensor. (on passenger side of engine on head).

Common sense things need to be checked like coolant level in radiator not just overflow bottle, and the color of the coolant. It should be bright green. Your car is an 86 and I am not sure if you have a manual fan on that or not... If so, disregard #5.

This should get you pointed in the right direction...

Good luck!
POZ

I have an 86 Trans Am as well, it has an electric fan. Unless of course, Canadian 86's were different