Automotive Air Conditioning Information Forum (Archives)

jness on Sat September 17, 2011 12:19 PM

Year: 1999
Make: Chevy
Model: Suburban
Engine Size: 5.7
Refrigerant Type: R134a
Country of Origin: United States

I have been doing alot of reading and found this place to be the most helpful.
A little about my problem: I have a 1999 Suburban with rear AC. The rear lines got a leak in them for a second time. I have decided that I am going to not have rear ac and just get the parts that would be in a 1998 chevy truck with the same engine.
So far I have the lines and the condenser. Still need to get the compressor and Accumulator. I plan on flushing the Evaporator with Mastercool AC Flush Kit and some Hecat Safe Flush. Then I just run shop air through it for about 30 min. Should I flush both ways?
As far as compressor goes not sure which one to buy the SANDEN or the Seltec-Valeo form ackits.com? Are they both direct fit which on would you guys suggest?

I need to get gauges from my brother in law but he uses them on r22 so I would need some kind of adapter for them?
It looks like I will need 36 oz of r134a so that will be 3 12oz cans any specific kind I should look for?
Will also need to find a vac pump. Will ask around really dont want to buy one.

I would like to get this done before it gets to cold here so if I am forgetting any thing let me know.

Thanks

Cussboy on Sat September 17, 2011 3:00 PM

There are block-off fittings available to simply block off the rear AC. If all that is wrong is the rear leak, I'd go that path. A different compressor will last longer, but needs mounts and new hose ends to be made. If your compressor and front AC is OK, I'd just block off the rear.

Only use R134a and (optional) UV dye. No sealers, conditioners, etc.

jness on Sat September 17, 2011 4:22 PM

I already tried the rear block off kit from street rod guys the first kit they sent me was for a Ford and the second one looked to be the right one but was of a different thread. My fault I got two wrenches out and started tightening thinking it was just a tight fit stripped the threads on my hose.

So I have the two new front hoses for a front only ac bought already.
So the compressors from ackits.com are not direct replacements?
https://www.ackits.com/pc/20-10658-S/Chevrolet98kfs5-7/20-10658-S+-+New+Compressor+-+Clutch
https://www.ackits.com/pc/10000282/Chevrolet98kfs5-7/10000282+-+New+Seltec-Valeo+Compressor+-+Clutch
These are the two I am looking at.

Edited: Sat September 17, 2011 at 4:28 PM by jness

iceman2555 on Sat September 17, 2011 8:48 PM

A suggestion would be to have the system professionally recharged. The chances of getting it recharged using cans is very remote. Esp when the number of cans stated is already too few. Yes, 3 cans equals 36 oz..however, it is highly unlikely that you will be able to remove all the refrigerant from each can...and it typically requires the first 3-4 oz of the first can to precharge your hose/manifold.
Good luck...

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The strongest reason for the people to retain the right to keep and bear arms is, as a last resort, to protect themselves against tyranny in government.
Thomas Jefferson

TRB on Sat September 17, 2011 11:31 PM

Why do you say they are not direct replacements?

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jness on Sun September 18, 2011 12:48 AM

@TRB I was replying to what cussboy said "A different compressor will last longer, but needs mounts and new hose ends to be made"

Will these two compressors work out of the box
https://www.ackits.com/pc/20-10658-S/Chevrolet98kfs5-7/20-10658-S+-+New+Compressor+-+Clutch
https://www.ackits.com/pc/10000282/Chevrolet98kfs5-7/10000282+-+New+Seltec-Valeo+Compressor+-+Clutch

I believe they would but when cussboy said "A different compressor will last longer, but needs mounts and new hose ends to be made" I dont want to do that I could just go to napa then.
I am sure I can get the help from you guys to do the job myself. Just need to know the correct compressor to buy.

If using 3 12oz cans is a problem which I read other posters using I will buy a 30 lbs tank then. I just enjoy working on my truck.

TRB on Sun September 18, 2011 12:52 AM

Those are an aftermarket option that is a direct fit. Valeo is out of stock. Sanden is available.

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jness on Sun September 18, 2011 1:00 AM

ok thanks will call and purchase Monday