ok on the highway from va beach to richmond my friends's car got a small leak in the radiator and caused it to over heat into the red. she got it towed to a shop and they replaced the rad., thermostat, and did a flush and refill. on her way back from the shop here car over heated again in stop and go traffic on 64 so she pulled over and waited for it to cool down and traffic to clear then she brought it home to me ......

heres the weird part ...

i took a look at everything Hoses, fans, connectors for everything cooling wise....
everything checked out and fluid was still good and no sludge under oil cap.

so i took it for a drive and dogged the shit out of it to see if it over heats......

it doesnt!?

come to find out it only overheats when i turn the AC on ...

(fans are running when AC is on)


HELP!

 

Hmm, I dont know how the pulley setup on those are arranged, if the AC runs off the same belt as the water pump, you could be underdriving the water pump, causing an overheat. I was thinking air pocket before you said it only overheats with the AC.

Make sure that thats the only condition it overheats under.

 

mine used to do this only when i had the a/c on.. never overheated any time recently because i just dont use the a/c

 

i believe the waterpump is timing belt drivin so .....^^^^^^^^^

 

You probably have too much semen in your tailpipe. Clean it out, then give it a go.

 

wow you know thats the one thing i didnt think of thanks

 

NP. I'm pretty good at things like that, thanks.

 

you might want to tell your friend to consult her owner's manual. it clearly states that overheating can occur when ac is used excessively during relatively hot weather. the extra strain ac puts on the motor in addition to the weather can cause the motor to overheat. its common knowledge, but seriously, read the owner's manual. it's there for a reason

 

bleed the system again turn on heater
check your fuse or relay fan or power probe the fan switch connector.

 

wow thanks for "CONSTRUCTIVE" criticism. but the days i tested it and got it to over heat with the AC on it was 74 degrees out with is pretty far from excessive heat issue....thanks but wrong diag. Dr. Foreman