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When driving low speed and A/C on car gets hot.

Joel Wilson said:
What kind of water pump do you have and when was the last time it was replaced? I put a HD water pump on the Jimmy which has a 400, and also added an external oil cooler with a remote filter mount. Almost all vehicles these days have an oil cooler of some sort so figured the Jimmy needed one. My temps run just over thermostat rating, transmission seems to run cooler too. I also have an additional temp sensor that is right at the radiator hose so that is temp that the engine actually sees. I kept the original sensor and gauge as a backup. I need to do a test next time it gets above 110 here and see what the temps are in a drive thru. I may add a small electric fan.
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This is the water pump I got https://shop.advanceautoparts.com/p/carquest-new-premium-water-pump-t3109/5421748-P . I have a Trans Cooler and I have a Radiator with the trans cooler built in Could i use the integrated trans cooler aluminium radiator as a oil Cooler
 
4X4ForDad said:
Overheating eh? Sounds like everybody has covered all the bases...except...Which way does your water pump pulley spin? Clockwise (CW) or counterclockwise (CCW)? I've seen where the fan clutch was spinning the wrong way! Look at the back of the fan clutch for an arrow indicating which way the fan clutch should spin. Same for the coolant pump. CW or CCW? oh, and make sure the fan blades correlate to the system, CW or CCW. Simple error to make (ask me how I know) the part was packaged wrong . Same goes for the coolant pump, CW or CCW? I always replace with a HD pump if available, just because!

If all is correct install an auxilary electric fan to come on with the A/C like I did. Install the largest fan that will fit, pusher or puller. Problem solved (hopefully). Oh...one other thing..are you using coolant and have to top off frequently and cannot find a leak? You may want to have a block leak check done to see if you have a head gasket leak. Small item that is a possibility too. As far as the fan clutch, OEM or aftermarket? I used the OEM HD big block fan clutch. $$$ but well worth it. Cool air has a price, especially in hot/humid climates.
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Well i looked back at what i ordered https://shop.advanceautoparts.com/p/carquest-fan-clutch-severe-duty-215045/6013759-P and you will see in the description in the blue Box and it says W/O A/C so it looks like it i ordered wrong fan clutch. I will let you know if the fan clutch solves this issue.
 
4X4ForDad said:
Overheating eh? Sounds like everybody has covered all the bases...except...Which way does your water pump pulley spin? Clockwise (CW) or counterclockwise (CCW)? I've seen where the fan clutch was spinning the wrong way! Look at the back of the fan clutch for an arrow indicating which way the fan clutch should spin. Same for the coolant pump. CW or CCW? oh, and make sure the fan blades correlate to the system, CW or CCW. Simple error to make (ask me how I know) the part was packaged wrong . Same goes for the coolant pump, CW or CCW? I always replace with a HD pump if available, just because!

If all is correct install an auxilary electric fan to come on with the A/C like I did. Install the largest fan that will fit, pusher or puller. Problem solved (hopefully). Oh...one other thing..are you using coolant and have to top off frequently and cannot find a leak? You may want to have a block leak check done to see if you have a head gasket leak. Small item that is a possibility too. As far as the fan clutch, OEM or aftermarket? I used the OEM HD big block fan clutch. $$$ but well worth it. Cool air has a price, especially in hot/humid climates.
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This has seriously got me thinking now. The next time I need a water pump I will be double checking rotation. I wonder though, can you get a CW or CCW pump and have the water neck come out in the same spot? Seems like the angle and location of the neck would be just a bit different. Thanks for bringing this up. Joel
 
ripple1973 said:
This is the water pump I got https://shop.advanceautoparts.com/p/carquest-new-premium-water-pump-t3109/5421748-P . I have a Trans Cooler and I have a Radiator with the trans cooler built in Could i use the integrated trans cooler aluminium radiator as a oil Cooler
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That water pump should work okay assuming the rotation is correct like previously mentioned which I never even knew about. You've got an aluminum radiator? Is it 2 or 3 core? Aluminum radiators usually work really well and dissipate heat quickly. Either way you go with an oil cooler, you will need to be able to tap into the inlet and outlet oil flow. I did a sandwich remote adapter from Derale since I needed to move my filter so I could fit the 2 qt oil filter. With the Moroso pan, the 2 qt filter wouldn't clear. With the exception of your fan clutch, it sounds like you've got everything covered. If you wanted to go with an oil cooler, I would go with a thermostat controlled unit. Derale sells a complete kit. I would also wait until you found out why you are overheating. 1 change at a time so you don't muddy the water in case there is a problem. Otherwise you may end up chasing your tail trying to find out what's wrong. Joel
 
Joel Wilson said:
This has seriously got me thinking now. The next time I need a water pump I will be double checking rotation. I wonder though, can you get a CW or CCW pump and have the water neck come out in the same spot? Seems like the angle and location of the neck would be just a bit different. Thanks for bringing this up. Joel
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I have been researching this CCW = Non Standard CW =Standard I got a standard Fan Clutch & Water pump.
 
Joel Wilson said:
That water pump should work okay assuming the rotation is correct like previously mentioned which I never even knew about. You've got an aluminum radiator? Is it 2 or 3 core? Aluminum radiators usually work really well and dissipate heat quickly. Either way you go with an oil cooler, you will need to be able to tap into the inlet and outlet oil flow. I did a sandwich remote adapter from Derale since I needed to move my filter so I could fit the 2 qt oil filter. With the Moroso pan, the 2 qt filter wouldn't clear. With the exception of your fan clutch, it sounds like you've got everything covered. If you wanted to go with an oil cooler, I would go with a thermostat controlled unit. Derale sells a complete kit. I would also wait until you found out why you are overheating. 1 change at a time so you don't muddy the water in case there is a problem. Otherwise you may end up chasing your tail trying to find out what's wrong. Joel
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I have a 4 Core Radiator. Ok Thank you Your advise.
 
ripple1973 said:
I have a 4 Core Radiator. Ok Thank you Your advise.
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I went Back thru and reread everything and you mentioned it was a 4 core. Duh. Sorry about that.

Have you popped the radiator cap once thermostat is open, and checked for coolant flow. Getting a water pump from a non AC vehicle will make a difference but I don't know if it will make that *big* of a difference. And since you just lost all your coolant, change the thermostat. I would go with one that fails open myself. Joel
 
Check your timing at 3k rpm if you have to much advance or not enough, you could be creating extra heat. The A/c just adds on top of that.
 
Had to go back and see tbi or no. I'm guess you still have carburetor? If distributor has vacuum advance it may have a leak. Check the mechanical weights under rotor for free movement and under broken springs
 
Well last week i was at a idle and the compressor i saw a big cloud of Freon and oil go everywhere, It came out of the back of the compressor so i am going to send the going to return the compressor, going to replace condenser and the compressor and throw on a condenser fan.
 
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