A/C Evaporator.
Thread Starter
Junior Member
Joined: Jun 2018
Posts: 5
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From: Colorado
A/C Evaporator.
Hello I have a 1986 Buick Century Limited with the 2.5L 4 Cylinder. I'm wondering if anyone has changed the AC Evaporator core in this car. Can anyone help me with a link to a video or web site or something, Please.
Thank You in advance
Aaron
Thank You in advance
Aaron
Senior Member
True Car Nut
Joined: Feb 2015
Posts: 6,851
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From: Earth
I'm betting there isn't a video available for this.
I believe you have to take a lot of the dash apart in order to replace the evaporator in this car. Once you replace the evaporator, are you ready to evacuate and recharge the AC system?
What is the original problem that it is having?
I believe you have to take a lot of the dash apart in order to replace the evaporator in this car. Once you replace the evaporator, are you ready to evacuate and recharge the AC system?
What is the original problem that it is having?
Senior Member
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Joined: May 2016
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The heater core is inside on these A-body cars (1982 - 1996), but the evaporator is serviced from under the hood.
I found an old post from an A-body website that claims it is only booked as a 2.5 hour job;
Disconnect battery ground cable, then discharge A/C system.
Remove air cleaner assembly.
Disconnect A/C heater module electrical connectors, then harness straps. Move harness aside.
If equipped, remove heater hose routing bracket and resistor from cover, then vacuum tank.
Disconnect liquid line at evaporator inlet and low pressure line at evaporator outlet.
Dismount alternator and move away from module, if necessary.
Remove evaporator core cover retaining screws (loosen bottom screws only), then remove evaporator core cover.
Remove evaporator core.
Reverse procedure to install.
This is one of the few more routine services that I haven't performed on these cars!
I found an old post from an A-body website that claims it is only booked as a 2.5 hour job;
Disconnect battery ground cable, then discharge A/C system.
Remove air cleaner assembly.
Disconnect A/C heater module electrical connectors, then harness straps. Move harness aside.
If equipped, remove heater hose routing bracket and resistor from cover, then vacuum tank.
Disconnect liquid line at evaporator inlet and low pressure line at evaporator outlet.
Dismount alternator and move away from module, if necessary.
Remove evaporator core cover retaining screws (loosen bottom screws only), then remove evaporator core cover.
Remove evaporator core.
Reverse procedure to install.
This is one of the few more routine services that I haven't performed on these cars!
Thread Starter
Junior Member
Joined: Jun 2018
Posts: 5
Likes: 1
From: Colorado
I'm betting there isn't a video available for this.
I believe you have to take a lot of the dash apart in order to replace the evaporator in this car. Once you replace the evaporator, are you ready to evacuate and recharge the AC system?
What is the original problem that it is having?
I believe you have to take a lot of the dash apart in order to replace the evaporator in this car. Once you replace the evaporator, are you ready to evacuate and recharge the AC system?
What is the original problem that it is having?
Thread Starter
Junior Member
Joined: Jun 2018
Posts: 5
Likes: 1
From: Colorado
The heater core is inside on these A-body cars (1982 - 1996), but the evaporator is serviced from under the hood.
I found an old post from an A-body website that claims it is only booked as a 2.5 hour job;
Disconnect battery ground cable, then discharge A/C system.
Remove air cleaner assembly.
Disconnect A/C heater module electrical connectors, then harness straps. Move harness aside.
If equipped, remove heater hose routing bracket and resistor from cover, then vacuum tank.
Disconnect liquid line at evaporator inlet and low pressure line at evaporator outlet.
Dismount alternator and move away from module, if necessary.
Remove evaporator core cover retaining screws (loosen bottom screws only), then remove evaporator core cover.
Remove evaporator core.
Reverse procedure to install.
This is one of the few more routine services that I haven't performed on these cars!
I found an old post from an A-body website that claims it is only booked as a 2.5 hour job;
Disconnect battery ground cable, then discharge A/C system.
Remove air cleaner assembly.
Disconnect A/C heater module electrical connectors, then harness straps. Move harness aside.
If equipped, remove heater hose routing bracket and resistor from cover, then vacuum tank.
Disconnect liquid line at evaporator inlet and low pressure line at evaporator outlet.
Dismount alternator and move away from module, if necessary.
Remove evaporator core cover retaining screws (loosen bottom screws only), then remove evaporator core cover.
Remove evaporator core.
Reverse procedure to install.
This is one of the few more routine services that I haven't performed on these cars!
Thread Starter
Junior Member
Joined: Jun 2018
Posts: 5
Likes: 1
From: Colorado
Thanks. This info is almost word for word what'* found in the Chilton'* manual. Problem I'm seeing is that the engine appears to be in the way of that type of removal. I will get some pics and try to post them. I think the above person who said dash removal seems to be the more realistic way
Thread Starter
Junior Member
Joined: Jun 2018
Posts: 5
Likes: 1
From: Colorado
Evaporator Core
Senior Member
True Car Nut
Joined: Feb 2014
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From: Worcester, Ma.
Yes, I believe the evaporator is accessed from the engine compartment......not that bad a job...
Obviously, the whole system has been exposed to dirt/moisture....a flushing may be necessary....
Was this already converted to 134a or is it still R-12? That can open another can of worms.....
Obviously, the whole system has been exposed to dirt/moisture....a flushing may be necessary....
Was this already converted to 134a or is it still R-12? That can open another can of worms.....
