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Question

I replaced the ac compressor, orifice tube , compressor and accumulators. I don''t know what to look for any more. thank you for your help.

Submitted: 534 days and 15 hours ago.

Category: Chevy

Value: $15

Status: CLOSED

Optional Information:
2002 Cadillac escalade 6.0 AWD

Already Tried:
I replaced the ac compressor. orifice, accumulator. ac compressor and new ac belt.

Posted by Scott K 534 days and 15 hours ago.

Info Request

Hi XXXXXXX,
Welcome to Just Answer,
With the system operating, What it the temperature of the rear suction line, where it leaves the rear evaporator unit, by touch? Im just looking for hot, cold , warm.

534 days and 15 hours ago.

Reply

It is warm.

Accepted Answer

Is the charge of the refrigerant ok, How much refrigerant was put back in after parts replacement. If suction line is warm then we have a problem with the refrigeration system.
Have you replaced the rear Expasion Valve?

Accepts:
Expert:	Scott K
Pos. Feedback:	99.7 %
Answered:	6/6/2008

ASE Master Tech/Instructor

20 yrs Experience; GM factory Training ASE Master Certified with L1 advanced engine diagnostics

534 days and 15 hours ago.

Reply

the charge is ok. i put 2.7lbs of refrigerant. I have not replaced the rear expasion valve. Where is it located at? thanks.

Posted by Scott K 534 days and 14 hours ago.

Answer

2.7 lbs is the correct charge.
The rear Exp valve is located in the rear evaporator case next to the evaporator coil.
To remove it the right inside panel is removed and the evap case is removed, once the case is remove the case separates and the exspansion valve is exposed.
Under side view of hoses both sets must be removed, and the retaining nuts for the case removed.

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The rear quarter panel trim

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Rear evap case

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Remove the auxiliary HVAC module (3) from the vehicle.

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Remove the air temperature actuator (1).
Remove the stud on the underside of the rear HVAC module between the heater core inlet and outlet pipes (4).
Carefully separate the heater core pipe gasket from the module case and remove the heater core pipe retainer.

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Remove the screws from the HVAC module lower cover.
Remove the auxiliary HVAC module lower cover.

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Remove the heater core clamp.
Remove the heater core from the auxiliary HVAC module.
Carefully remove the gasket between the auxiliary HVAC module and the air distributor duct. This gasket will be re-used if possible.

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Remove the fasteners and separate the front case half from the back half.
Remove the evaporator core from the back case half.
Inspect the gaskets and the seals for damage.
Replace the gaskets and the seals, as needed.

Valve

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Question

I replaced the ac compressor, orifice tube , compressor and accumulators. I don''t know what to look for any more. thank you for your help.

Optional Information

Optional Information: 2002 Cadillac escalade 6.0 AWDAlready Tried: I replaced the ac compressor. orifice, accumulator. ac compressor and new ac belt.

Info Request

Hi XXXXXXX,Welcome to Just Answer,With the system operating, What it the temperature of the rear suction line, where it leaves the rear evaporator unit, by touch? Im just looking for hot, cold , warm.

Reply

It is warm.

Accepted Answer

Is the charge of the refrigerant ok, How much refrigerant was put back in after parts replacement. If suction line is warm then we have a problem with the refrigeration system.Have you replaced the rear Expasion Valve?

Reply

the charge is ok. i put 2.7lbs of refrigerant. I have not replaced the rear expasion valve. Where is it located at? thanks.

Answer

Related Chevy Questions

Optional Information:
2002 Cadillac escalade 6.0 AWD

Already Tried:
I replaced the ac compressor. orifice, accumulator. ac compressor and new ac belt.

Hi XXXXXXX,
Welcome to Just Answer,
With the system operating, What it the temperature of the rear suction line, where it leaves the rear evaporator unit, by touch? Im just looking for hot, cold , warm.

Is the charge of the refrigerant ok, How much refrigerant was put back in after parts replacement. If suction line is warm then we have a problem with the refrigeration system.
Have you replaced the rear Expasion Valve?