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Evaporator core replacement

I need to replace the evaporator core in my 97 gmc truck 1500. Can you supply me with the procedure as well as diagrams to get this job done. I have all the connections in the engine compartment disconnected but need help with the under dash anchor points.

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

  • 120 Answers

SOURCE: I have a 1992 olds

in my experience finding specific directions on how to do that are nearly impossible to find due to the strict EPA regulations on the use of refrigerant. but when i replaced the evaporator core on my tahoe i found it helpful to go on to youtube and search how to remove the dash. once the dash is out disconect the lines going to the evaporator core and the heater core from the engine side of the firewall. from inside the vehicle remove all screws securing the heater box to the firewall. you have to search for one or two hidden screws. looking from the engine side may make them visible. the heater box should pull out easily if not you missed a screw. once out of the vechicle remove all screws hold the box halves together, mine had about fifteen going all the way around it. open it up remove the evaporator core, clean any dirt, leaves etc. out of the box. replace core and reinstall. honestly not a very difficult job, but it is time consuming. hope this helps.

Posted on Apr 08, 2011

Tech Jenkins
  • 359 Answers

SOURCE: 97 buick skylark ac evaporator core what do i need to do to get to it

Did you replace the schrader valves (the thing in the inside of the A/C service fittings, you need a special tool to remove and install them) before you recharged the system? They are notorious for leaking if they are old.

If you did not, replace those and try again, if it leaks out again with no evidence you most likely have a bad evap core.

And yes, it's a pain in the ****, plan on it taking a 30 pack of bud light and a weekend to do, or one day and a 12 pack if you are good. Just start taking the dash apart, and may the force be with you. It will be behind the glove box

Posted on Jul 29, 2008

  • 3 Answers

SOURCE: need a diagram or instructions on how to replace a heater core 97

buy a haynes repair manual for your vehicle

Posted on Mar 12, 2009

joe russell
  • 84 Answers

SOURCE: 97 gmc sonoma 4.3, does the A/C evaporator come

engine compartment

Posted on Oct 10, 2010

perkins48
  • 14337 Answers

SOURCE: I have a 1997 GMC

Operation: The evaporator is responsible for supplying the area for the refrigerant to expand and turn cold. Advice: Before the evaporator can be removed, the old refrigerant must be drawn out by certified professionals using specialized equipment. Check with your repair shop for prices on evacuating the old refrigerant before you make the repairs and then drawing the system down to a vacuum and refilling with refrigerant after your repairs have been made. Because of it's location under the dash replacing the evaporator is probably one of the more difficult AC system jobs,I would reconmend taking to a repair shop.

Posted on Jul 05, 2011

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Sometimes you can get to the evaporator cores without removing them from the vehicle, and clean it.
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Where exactly is the orifice tube located at on a 1996 (DOHC v6)?


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A/C Evaporator Core Orifice The A/C evaporator core orifice (19D990) should be replaced whenever the A/C compressor (19703) is replaced for lack of performance (internal damage). The A/C evaporator core orifice, located in the condenser to evaporator tube (19835), cannot be serviced in detail as a component of the line. If replacement is necessary, follow the procedure outlined for Liquid Line Removal and Installation. An orifice tube replacement service kit may be used as an optional service procedure. Refer to Section 12-00 for information regarding the use of an A/C Evaporator Core Orifice Replacement Kit E5VY-19D695-A.
-----------------------------------------------------------------------------------
A/C Evaporator Core Orifice Replacement Kit Installation
  1. Discharge A/C refrigerant system. Refer to System Discharging and Recovery as outlined.
  1. Remove condenser to evaporator tube (19835) from vehicle.
  1. Locate A/C evaporator core orifice (19D990) by three indentations or a circular recess in metal portion of the condenser to evaporator tube.


    A/C Evaporator Core Orifice Location
32c58e1.gif
  1. Note angular position of ends of condenser to evaporator tube so that it can be reassembled in correct position.
  1. Cut a 63.5 mm (2.5 inch) section from condenser to evaporator tube at A/C evaporator core orifice location. Do not cut closer than 25.4 mm (1 inch) from start of a bend in tube.


    A/C Evaporator Core Orifice Section Removed From the Liquid Line
    ea95a2d.gif
  1. Remove contaminants from the two pieces of the condenser to evaporator tube.
  1. NOTE: The inlet half of the condenser to evaporator tube will be positioned against the A/C evaporator core orifice tabs when correctly assembled.

    Lubricate fitting with clean refrigerant oil and assemble orifice tube kit (with A/C evaporator core orifice installed) to condenser to evaporator tube. Make sure flow direction arrow is pointing toward evaporator end of the condenser to evaporator tube, and taper of each compressor ring is toward compression nut.


    A/C Evaporator Core Orifice Kit Disassembled Components
    4280629.gif

Jun 05, 2009 | 1996 Mercury Sable

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Heater Core Replacement


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Mar 13, 2009 | 2003 GMC Sierra

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NEED TO REMOVE DASH TO REPLACE HEATER CORE ON 1995 GMC SONOMA


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Aug 01, 2008 | 1997 GMC Jimmy

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97 buick skylark ac evaporator core what do i need to do to get to it


Did you replace the schrader valves (the thing in the inside of the A/C service fittings, you need a special tool to remove and install them) before you recharged the system? They are notorious for leaking if they are old.

If you did not, replace those and try again, if it leaks out again with no evidence you most likely have a bad evap core.

And yes, it's a pain in the ****, plan on it taking a 30 pack of bud light and a weekend to do, or one day and a 12 pack if you are good. Just start taking the dash apart, and may the force be with you. It will be behind the glove box

Jul 29, 2008 | 1997 Buick Skylark

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