AU1 cooling

[Marquis 351]

Hey, my AU1 fairmont, gets so hot on the odd ocasion wen sitting parked with the aircon on then when i drive of it drives like crap when that auto cylinder shut down kicks in. I have re placed the rad, thermostat [motorcraft] and the coolant tank. i dont know if the thermo fans arnt kicking in? i know the aircon dosnt always work i can hear th a/c compressor trying to kick in maybe 10 times and thats wen it gets hot. Please help. Thanks

[InfernoSR]

First thing is first... what sort of Radiator is the replacement?

[StealthAu]

Forget the rad,cause if as you say the issue is only happening at a stand still, the fans are at fault

[InfernoSR]

Originally Posted by StealthAu

Forget the rad,cause if as you say the issue is only happening at a stand still, the fans are at fault

The radiator can make the most massive problem by simply being the wrong type...

I'd get a pressure test, test for split hoses... aswell and a thematic fan load test.

[StealthAu]

Originally Posted by BLUEPRINT

The radiator can make the most massive problem by simply being the wrong type...

I'd get a pressure test, test for split hoses... aswell and a thematic fan load test.

He mentioned the problem only occurs when at a stand still, so I'll make the asumtion when driving and air is naturally being passed thru the radiator there isn't an issue, so the only time there is a problem is when the only air flowing thru the radiatior is that being drawn by the fans.
If he didn't say the issue happens when parked I'd agree with you, but in this case I don't.

[InfernoSR]

Originally Posted by StealthAu

He mentioned the problem only occurs when at a stand still, so I'll make the asumtion when driving and air is naturally being passed thru the radiator there isn't an issue, so the only time there is a problem is when the only air flowing thru the radiatior is that being drawn by the fans.
If he didn't say the issue happens when parked I'd agree with you, but in this case I don't.

All i am trying to do is go through my diagnosing stage... find out whats been replaced with what sort of component... A water pump can be this cause too... same with the wrong thermostat, wrong cap, blocked water jackets, blocked radiator (internal and/or external)...

I just want to help with some answers, but in turn need a couple of questions answered...

[Mechan1k]

Could be a number of things.

One way to check if the fans are coming on full speed ... turn A'/C on and turn it to fan speed 3 or 4 ... you should hear them roar.

I had one of my fans lose it's efficiency ... only slowly turned without much force .... so i just replaced the thermos completely.

Another thing though is that your water pump may be completed corroded out internally and it is not pumping the watter/coolant around your watter galleries enough.

I have been through the overheating fun (not fun really) ... it's really trial and error in some cases.

When it comes to radiators ... don't scimp on them ... If getting a replacement ... got to NATRAD or ADRAD for a decent radiator ... my aftermarket twin core copper radiator only cost me $250-ish

[sly]

You can't miss the roar of the thermo fans kicking in. Try what Mechan1k says, even open the bonnet to be sure you can hear them (or not). And Blueprint is a radiator specialist, so if you can give him the info he asked for you can attack the problem on 2 fronts.

[Marquis 351]

i replaced the hoses also, the red was a heavy dudy rad, much thicker than the orignal rad anyway, it wasnt a cheap rad, it cost in the ball parf of $200, [trade price] the thermostat as i said is motorcraft. Water pump or thermo fans maybe the prob?????????