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Old 08-13-2010, 12:23 PM
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A/C evaporator replacement

I just dropped a s.b. in my 1990 c 1500 p/u.
Former engine was 4.3
I am now literally replacing every a/c component,the previous owner twisted the aluminum line in the evaporator in an attempt to replace the pipe to the receiver/drier.
My question is. Has any one here replaced the evap in this type vehicle before?
I don't mind doing this by the seat of my pants,but experience at doing this would certainly be helpful.
The Haynes manual I have does not show a detailed explanation for this task,I have so far removed the heater core cover and are approaching it from the inside of the vehicle.
Is there a way to drop the whole plastic housing that holds the evap heater assy. from under the hood or. Am I going to have to remove the whole dash and go that route?
By the way, if anybody here is doing this engine swap I have some good experience at it and will be happy to help!

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Old 08-13-2010, 08:20 PM
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Quote:
Originally Posted by topwrench
I just dropped a s.b. in my 1990 c 1500 p/u.
Former engine was 4.3
I am now literally replacing every a/c component,the previous owner twisted the aluminum line in the evaporator in an attempt to replace the pipe to the receiver/drier.
My question is. Has any one here replaced the evap in this type vehicle before?
I don't mind doing this by the seat of my pants,but experience at doing this would certainly be helpful.
The Haynes manual I have does not show a detailed explanation for this task,I have so far removed the heater core cover and are approaching it from the inside of the vehicle.
Is there a way to drop the whole plastic housing that holds the evap heater assy. from under the hood or. Am I going to have to remove the whole dash and go that route?
By the way, if anybody here is doing this engine swap I have some good experience at it and will be happy to help!
Take the heater core out and then you can take the evap core out.The service info doesnt say to remove the whole case.after the heater core is out you should be able to get the evap out.
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Old 08-14-2010, 06:29 AM
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Thanks at least now I know how to attack this!
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Old 08-28-2010, 02:32 PM
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Ok,Im done but I did have to remove coolant rec.tank and take entire plastic housing out, doesnt come out any other way
Took me about 6 hours solid work.
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Old 08-28-2010, 06:09 PM
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It has been a while since i have replaced one on that vintage but i do recall the evap will come out without pulling the whole case. It was still a pain and with plastic that old it may have gotten broken. It was a pain in the @22 to do but it will come out. Some force was required and I had concerns about damage putting the new one back. Better you were safe and not sorry. I almost allways refer to the service manual when making a repair but that doesnt allways work out.
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Old 08-29-2010, 12:48 PM
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Hey but no kiddin man u gave me a good starting point!
So now that Ive got the dash back together,in the process of r&r condenser n every other a/c component.
Compressor was replaced by previous owner that twisted the threads on evap to acc. line.
Whole system was full of black stuff kinda looked like what they use to call "black death" on ford a/cs.
So really thanks for ur help!!
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Old 08-29-2010, 03:37 PM
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You are very welcome. I hope it cools well for you.It is nice to have A C in your ride. I have a black truck (98 Nascar F 150 ) I could not imagine driving it without AC.
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