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2013 Chevrolet Suburban
Platform: GMT 400, 800, 900

Help with 02 suburban over heating and AC

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Old Jun 4, 2020 | 7:11 PM
  #31  
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Test it !
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Old Jun 4, 2020 | 7:49 PM
  #32  
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Originally Posted by Cusser
I thought that it was established early that your AC compressor was engaging.

Remember: you have two issues: (1) AC and (2) overheating of the engine at idle/low speeds

Hmm - could your replacement fan clutch have been bad????????????????
alright so when i spray the ac condensor with water it drops down to 45 psi green level and when its running and dont shoot it with water it goes up 50+ is that the consensor ? Or am i getting some false results
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Old Jun 4, 2020 | 7:56 PM
  #33  
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Originally Posted by Matthew V
alright so when i spray the ac condensor with water it drops down to 45 psi green level and when its running and dont shoot it with water it goes up 50+ is that the condensor ? Or am i getting some false results
That test shows that your condenser is not cooling enough. Such as insufficient air flow from bad fan, bad fan clutch, improper radiator shrouding.

And real services gauges are a MUST for doing work like this.
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Old Jun 4, 2020 | 7:58 PM
  #34  
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Originally Posted by Cusser
That test shows that your condenser is not cooling enough. Such as insufficient air flow from bad fan, bad fan clutch, improper radiator shrouding.

And real services gauges are a MUST for doing work like this.
which fan? I just have one big one. I doubt the fan clutch is bad. What is radiator shrouding?
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Old Jun 4, 2020 | 9:05 PM
  #35  
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Originally Posted by Cusser
That test shows that your condenser is not cooling enough. Such as insufficient air flow from bad fan, bad fan clutch, improper radiator shrouding.

And real services gauges are a MUST for doing work like this.
also gialsg it a good hose down front and bottom cleaning it would that solve the issue? Not enough air flow?
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Old Jun 5, 2020 | 6:02 PM
  #36  
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Originally Posted by Cusser
That test shows that your condenser is not cooling enough. Such as insufficient air flow from bad fan, bad fan clutch, improper radiator shrouding.

And real services gauges are a MUST for doing work like this.
also is the ac condensor suppost to be hot or cold to the touch?
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Old Jun 5, 2020 | 6:28 PM
  #37  
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Originally Posted by Matthew V
also is the ac condensor suppost to be hot or cold to the touch?
When you go out to say hello to your vehicle in the morning, the condenser will be about the temperature of the environment.

When the AC is switched on and operating properly, the condenser will be quite HOT, it sheds its heat to the incoming air. Inside the condenser the refrigerant cools to change from a hot gas (discharge or high side of compressor) to a hot liquid. When this liquid meters through an orifice tube or expansion valve into the evaporator, it changes into a gas by pulling heat from the evaporator. Look up air conditioning cycle on Google, there's a lot to learn Grasshopper !
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Old Jun 6, 2020 | 2:27 PM
  #38  
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Originally Posted by Cusser
When you go out to say hello to your vehicle in the morning, the condenser will be about the temperature of the environment.

When the AC is switched on and operating properly, the condenser will be quite HOT, it sheds its heat to the incoming air. Inside the condenser the refrigerant cools to change from a hot gas (discharge or high side of compressor) to a hot liquid. When this liquid meters through an orifice tube or expansion valve into the evaporator, it changes into a gas by pulling heat from the evaporator. Look up air conditioning cycle on Google, there's a lot to learn Grasshopper !
took it to a mechanic to test the whole ac system turns out its a bad compressor. Could that cause the overheating? Also would you recommend a delphi one or should I spend the extra cash and get a delco?
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Old Jun 6, 2020 | 5:13 PM
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Originally Posted by Matthew V
took it to a mechanic to test the whole ac system turns out its a bad compressor. Could that cause the overheating? Also would you recommend a delphi one or should I spend the extra cash and get a delco?
That could be the cause if the compressor was taking extra effort of the engine to spin it. Just because I am not experienced with that condition doesn't mean it cannot happen.

When I had a compressor seize while driving along, it just stopped turning and the belts started squealing and burning. But if compressor was very tough to turn, I could see that producing more friction heat and requiring more engine load.

Hopefully that mechanic knows what he is doing. Personally, I would go for the new Denso compressor, OEM instead of Delco. Note there are versions for dual air, and just front air. I have replaced the compressor in my 2005 Yukon (dual air) and that was successful and straightforward, maybe 5 years ago, Arizona.

Here's what the expert on the radio says (for all repairs): Tell mechanic that you'll pay for a fix but not a guess, as he's assumed to have expertise. Pay with a credit card, and ask for your old parts back; if his repair doesn't fix it, dispute the charge with the credit card company.
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Old Jun 6, 2020 | 8:53 PM
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Originally Posted by Cusser
That could be the cause if the compressor was taking extra effort of the engine to spin it. Just because I am not experienced with that condition doesn't mean it cannot happen.

When I had a compressor seize while driving along, it just stopped turning and the belts started squealing and burning. But if compressor was very tough to turn, I could see that producing more friction heat and requiring more engine load.

Hopefully that mechanic knows what he is doing. Personally, I would go for the new Denso compressor, OEM instead of Delco. Note there are versions for dual air, and just front air. I have replaced the compressor in my 2005 Yukon (dual air) and that was successful and straightforward, maybe 5 years ago, Arizona.

Here's what the expert on the radio says (for all repairs): Tell mechanic that you'll pay for a fix but not a guess, as he's assumed to have expertise. Pay with a credit card, and ask for your old parts back; if his repair doesn't fix it, dispute the charge with the credit card company.
I mean according to him it works intermittently. Alright ill look into denso. And I should get a compressor that says its for dual air front and back? I was just going to use a dye kit to see if i have any leaks for the overheating
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