Over heating only with AC on

The Great Lakes Panther board on FB may be a better resource for the OP. The board overrun with clapped out police cars, some Lincolns and the odd Marauder. My car spent its entire life in MI before coming to NC last year so I signed up for that reason. I was kicked off and deemed a troll for questioning why people were trying to collect money for the board moderator, feeling he deserved some sort of 'salary'. Yeah, I gave them a fit over a bunch of other crap too.
 
Update:

So i replaced the reservoir cap today. Weather was not that hot and it wasnt that humid either. Drove around for an hour in stop and go traffic with ac full blast. Temp never went over 203f. I thought that replacing the cap was the solution. Get home, park my car in the garage and let the car idle just to test it some more. After a few mins, temp starts rising. So im back to square one. I was curious to see if the new cap was helping with pressure so i slowly went ahead and openned it. To my surprise, no pressure what so ever. Put cap on, left hood open and ac blasting. Few mins later, temp was low at 203. So i went ahead and closed the hood. Few mins later, temp started riseing. So this right here for sure clarifies that my temp issue is surely ventalation issues. Now, im concerned about the reservoir not having pressure.
 
crownvic05 said:
Update:

So i replaced the reservoir cap today. Weather was not that hot and it wasnt that humid either. Drove around for an hour in stop and go traffic with ac full blast. Temp never went over 203f. I thought that replacing the cap was the solution. Get home, park my car in the garage and let the car idle just to test it some more. After a few mins, temp starts rising. So im back to square one. I was curious to see if the new cap was helping with pressure so i slowly went ahead and openned it. To my surprise, no pressure what so ever. Put cap on, left hood open and ac blasting. Few mins later, temp was low at 203. So i went ahead and closed the hood. Few mins later, temp started riseing. So this right here for sure clarifies that my temp issue is surely ventalation issues. Now, im concerned about the reservoir not having pressure.
Click to expand...


Maybe your car isn't running hot? Good grief....

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I am purchasing a radiator pressure test kit today after work. I will check the pressure and see whats happening there. Reservoir not having pressure can be related to my overheating with ac on.
 
Update

Ok so drove to harbor freight and bought a radiator pressure test kit. Got home and went at it. Gave it 16psi of pressure and pressure started dropping. I then herd drips. Found that the clamp on the lower radiator hose where it connects to the oil filter adaptor wasnt making enough force to keep the hose tight. Replaced the clamp.

Tested the system again and gave it 16psi. Didnt give it much time just maybe 2 mins and didnt see no drop. Put the cap back on and went for an hour drive. Got home and went to remove the reservoir cap and no god damn pressure. Tested the pressure with the test kit and this time left it hooked up for 15 mins. Gave it 17psi and 15 mins later lost 3psi. Couldnt find no leak no where.

So now what?
 
Just want to inform that i have resolved my issue. Bought all new heavy duty blue silicon hoses for a p71. Also bought all new clamps. Purchased a new reservoir and cap and a brand new oem motorcraft fan and motorcraft waterpump, just in case. Also installed my stock oem water pump pulley and crank pulley. Took my steedas of. System now holds pressure and no over heating. Ac is even colder.

Want to thank all for your inputs and time. Greatly appriciate the web site.
 
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I wonder will that be the solution for my Marauder I’m having the same exact problem after putting a new block in my car it starts overheating with the ac on


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Update guys, so i fixed the issue with the system not holding pressure. Thats great. Seems like the over heating with ac on is still happenning. Today temp was up in the 101 feeling 110. In heavy stop and go traffic, car started getting hot. Plugged in my sct to data log the coolant temp. Hit the 103 celcius which is 217 f. Had to shut off and temp started dropping. I beleive that the issue might be the ac compressor. It has a none stop ticking noise. Might be failing causing overload. Ive read that its possible.

Back to step one.
 
217* ain't too bad under those conditions.....mine hit 228* in stop and go traffic once with a 105* ambient!!:confused:

Does the temperature stabilize when you are moving at about 45 MPH??:cool:
 
228? wao thats high. But you have a procharger on your car. Creates more heat?

The fact that this only happens with AC on, implies that theres some kind of issue. This week wont be that bad. I will drive her and see what happens. Weather shouldnt reach 90's this week.
to be continue
 
Your a/c condenser fins are dirty and sending hot air across the radiator


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So i just ordered ac condenser, accumulator, compressor and orifice tube. All parts are motorcraft and throught rockauto with the beautiful 5% off.
I am determine to have this issue resolved. My ac condenser, the fins are pretty much crushed especially towards the bottom.

I will report hopefully next week when i get all this installed.
Today weather was at 83. Ac was on high. Temp was rising slowly and made it to 204 before i shut off the ac and temp lowered pretty fast to 194 and sat there. When ac is on, i can feel the engine some what stall. I have a feeling that my 170k mile compressor is close toast especially with that none stop clicking noise. Also the fact that the ac condensor isent moving much air through because of the crushed fins can also be an issue for ventilation.
 
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