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JA5PER5
New User
Apr 25, 2009, 6:05 AM
Post #1 of 8
(2137 views)
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REPLACE HEATER CORE
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CAN SOMEONE HELP ME I NEED TO REPLACE THE HEATER CORE IN MY 1991 PONTIAC TRANS AM I HAVE 70,000 MILES AND A 350 ENGINE, MY QUESTION IS WILL I NEED TO TAKE OUT THE GAS IN MY AIR COND. SYSTEM TO REPLACE THE HEATER CORE? PLEASE HELP
THANKS
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Apr 25, 2009, 10:15 AM
Post #2 of 8
(2132 views)
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Re: REPLACE HEATER CORE
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Wish I knew specifics but it's possible you do need to take "evaporator" out at the same time. This would mean recovering existing refrigerant for return later. Use new "O" rings as needed and Nylog or I like pure silicone grease for those. Just a smear!
They are a pill but doable with enough time and patience,
T
Hit back if you need help recharging A/C. It's posted here in good detail anyway at this section - subject line in all caps....
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Apr 25, 2009, 10:17 AM
Post #3 of 8
(2130 views)
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Re: REPLACE HEATER CORE
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To add: Are you still with R-12 or swapped already to 134a? It matters! It's getting hard to find places to help with recovering R-12 and if you are already 134a just use new stuff and take contamination out of the game,
T
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Hammer Time
Ultimate Carjunky
/ Moderator
Apr 25, 2009, 10:25 AM
Post #4 of 8
(2127 views)
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Re: REPLACE HEATER CORE
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That was a evap core, I'll get the heater instr.
The heater core is much harder because the dash and console have to be removed.
- To avoid personal injury when servicing models equipped with Supplemental Inflatable Restraint (Airbag) System, temporarily disarm system. Refer to Air Bags and Seat Belts/Air Bags (Supplemental Restraint Systems)/Service and Repair.
- Disconnect battery ground cable and drain cooling system.
- Remove instrument panel and center console.
- Remove heater case, Fig. 21.
- Remove heater core shroud screws, then separate heater case assembly.
- Remove core mounting strap, then the core.
- Reverse procedure to install.
- After completing service procedure activate Supplemental Inflatable Restraint (Airbag) System. Refer to MAINTENANCE PROCEDURES/AIRBAG SYSTEM DISARMING.
Dash removal
- Disable airbag system as described under MAINTENANCE PROCEDURES/AIRBAG SYSTEM DISARMING.
- Disconnect battery ground cable.
- Turn ignition to the Off position, then remove fuse No. 10 from fuse panel.
- Disconnect position assurance (CPA) and yellow two-way (SIR) harness connector at base of steering column.
- Remove shifter handle and seven shift gate trim plate attaching screws.
- Remove radio and A/C heater controller trim plate.
- Remove A/C heater controller attaching screws, then pull controller rearward and disconnect electrical connections, vacuum connections and remove heater control cable.
- Remove four radio retaining screws, then pull radio rearward and disconnect the power, speaker and antenna connectors.
- Disconnect all console electrical connectors.
- Remove six console hold down and two console to instrument panel screws and remove console.
- Remove instrument panel trim pad and hush panels, Figs. 154 through 157.
- Remove right and left lower instrument panel covers and trim plates, Figs. 158 and 159.
- Remove six instrument cluster attachment screws, then pull cluster back and disconnect speedometer cable and electrical connections.
- Remove headlight switch assembly.
- Lower the steering column, then remove five upper and six lower instrument panel carrier to cowl screws.
- Disconnect instrument panel electrical harness at bulkhead connector and under dash.
- Remove instrument panel carrier, Fig. 160.
- Reverse procedure to install.
- Reactivate airbag system as described under MAINTENANCE PROCEDURES/AIRBAG SYSTEM DISARMING.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
(This post was edited by Hammer Time on Apr 25, 2009, 11:09 AM)
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Apr 25, 2009, 10:29 AM
Post #5 of 8
(2122 views)
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Re: REPLACE HEATER CORE
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Thanks Hammer!
That earns you company stars.......
You can cash those in at the company store and still have nothing but wall paper
T
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JA5PER5
New User
Apr 25, 2009, 1:14 PM
Post #6 of 8
(2102 views)
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Re: REPLACE HEATER CORE
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THANK YOU FOR THE INFORMATION, AND THE DIAGRAMS .YES I STILL DO HAVE THE R12 IN THE SYSTEM I'M NOT SURE IF I NEED TO WORRY ABOUT THE AIR COND. SYSTEM?? I WOULD LIKE TO FIX IT MYSELF AND NOT SPEND THE EXTRA CASH.
THANKS AGAIN
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Hammer Time
Ultimate Carjunky
/ Moderator
Apr 25, 2009, 1:27 PM
Post #7 of 8
(2101 views)
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Re: REPLACE HEATER CORE
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No, it doesn't appear that you will have to evacuate the refrigerant to remove the heater core.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Apr 25, 2009, 1:58 PM
Post #8 of 8
(2091 views)
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Re: REPLACE HEATER CORE
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You'll know as you get there. Legalities or not just be real careful as if you open a line it can freeze the skin right off you.
Unless you live in the hottest of climates switching to 134a will still work fine or find new R-12 which is out there but does cost more and is restricted to buy,
T
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