I have i 93 CX 1.5 stock. When the car heats up, the temp guage will travel almost to hot, and then drop down to normal REALLY quick. I replaced the radiator about 3 months ago and just replaced the thermostat. Also, the overflow tank gets full and looks like it leaks out of the cap. Not sure if its a cracked coolant jacket or what. ????????

 

is the fan workin or does it only run hot when idleing tell more im mechanic

 

it does both. Seems like it acts up more when i'm driving/accelerating. The fan works, but i was thinking its something else because of how quickly the guage will drop. It was doing it tonight, but after i added some coolant it was ok. Not sure why its overflowing the coolant either in the catch tank.

 

sounds like it may have colant leak when u trun on ur heat does the temp gag drop
if so its cuz ur low on coolant then u got a leak try putting coolant presser gag on it
fill it with coolant aand look for leak

 

I would check your radiator cap or for a leak on one of the coolant lines. I had a similar problem, my temp would go up really high and then drop all of a sudden. turns out I had a cracked line that was leaking coolant so i was runnning low. If the overflow trank is getting really full than the only thing that would effect that would be the radiator cap. It's a cheap check/fix and if that doesn't work check for a leak somewhere. Hope this helps.

 

thanks for the info. just curious too why the hose that connects to the thermostat housing isn't getting warm when the top hose is.

 

i had this same prob, if i stay under light throttle everything stayed fine but when i got in it it would heat up, and when i got off the gas it would drop back 2 normal. Its an air pocket in the system somewhere. If u have a bleader valve on your thermastat housing let the car warm up and open it for about 2 min u should be fine afted that

 

you have an air pocket in your coolant system run it with your cap off the rad and watch the flow.

 

just bled the system and it seems to be working properly. Got a pressure tester also, but couldn't use it cuz they gave me the wrong one. Oh well, thanks for the help.

 

same thing happened to me when I bought my cx couple months ago. I troubleshooted by changing the thermostat and radiator but it kept over heating. Brought it to the shop and found out that the engine head gasket was burnt so I guess air leaked in. There were never any problems with overheating ever since the engine head got it shaved and a new gasket was put in.

 

maybe a clogged radiator
i had the same problwm and that fixed it

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by zoolander &raquo;</TD></TR><TR><TD CLASS="quote">thanks for the info. just curious too why the hose that connects to the thermostat housing isn't getting warm when the top hose is.</TD></TR></TABLE>
yea. i want to know why too