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1985 G20 305ci/4 Speed - A/C Hose Confusion #734574
April 02nd 2018 9:21 am
April 02nd 2018 9:21 am
Joined: Sep 2013
Posts: 725
Indiana
tuner4life Offline OP
old hand
tuner4life  Offline OP
old hand
Joined: Sep 2013
Posts: 725
Indiana
While everything is apart, I am working on revamping the Heat and A/C in my van. The Heater core was no issue, and the A/C evaporator in the dash, accumulator, and compressor hasn't been an issue, but that's where the simple stuff ended. I ordered a condenser based on the vehicle info, and it was wrong. Every single option had the inlet and outlet on the same side of the condenser, while mine has the inlet and outlet on opposite sides.. Eventually, we were able to find the correct condenser from a G30 with a diesel shocked

[Linked Image]
[Linked Image]

Eventually, we were able to find the correct condenser from a G30 with a diesel shocked

This van is a 305 with a 4 speed manual. I wonder if that combination caused the odd configuration with the diesel condenser?

At that point I figured I was probably in for a ride trying to source the dual hose assembly that goes from the compressor to the condenser, and to the accumulator. After looking at several parts stores, and all over online, I concede, I need help.

Here are a few pictures of what I need. The thin line goes to the drivers side of the condenser, and the thicker line goes across the top of the engine bay to the accumulator. I am not sure what the small cylinder is on the one line, but it is kind of rusty and I'm concerned about re-using this hose due to the age, and the previous compressor failure (shrapnel/shavings everywhere).

[Linked Image]
[Linked Image]
[Linked Image]
[Linked Image]
[Linked Image]


I can't seem to find an A/C hose assembly that looks anywhere close to this thing. Looking across multiple years/models/engines. I've even tried some of the tried and true GM parts sites with diagrams, and can't find anything. Can anyone help?

Thanks!


Last edited by tuner4life; April 02nd 2018 9:24 am.

[Linked Image]
Re: 1985 G20 305ci/4 Speed - A/C Hose Confusion [Re: tuner4life] #734579
April 02nd 2018 10:58 am
April 02nd 2018 10:58 am
Joined: Jun 2010
Posts: 13,704
Van Diego California
frscke1 Offline
frscke1  Offline

Joined: Jun 2010
Posts: 13,704
Van Diego California
A A/C shop should be able to source that for you ..... take the old one, bring home new ...


SUNSHINE VANS-VAN DIEGO
ADRENALIN BY THE GALLON & CHASIN RACIN
ONE FOR THE DIRT & ONE FOR THE STREETS
'93 CHEVY G30 454 4X4 SPORTVAN EXT 146" WB
'92 CHEVY G30 454 BEAUVILLE EXT 146" WB
Re: 1985 G20 305ci/4 Speed - A/C Hose Confusion [Re: tuner4life] #734591
April 02nd 2018 2:30 pm
April 02nd 2018 2:30 pm
Joined: Sep 2005
Posts: 8,479
Georgia, USA
CatFish Offline
carpal tunnel
CatFish  Offline
carpal tunnel
Joined: Sep 2005
Posts: 8,479
Georgia, USA
The larger line is the compressor suction (lo pressure side) from the suction accumulator and the smaller line is hot gas (hi pressure vapor) from the compressor to the condenser. The small "can" in the hot gas line is a sort of muffler to absorb/smooth out some of the compressor pulses. You may end up at a AC shop like Scott said. Get ahold of some of the local car clubs and ask those guys if there's someone local you can take the old stuff to to be copied. I would trust their recommendations first, some of them are (almost) as picky as you are......... lol

Just kiddin' grin

(they're not that picky)
laugh

Last edited by CatFish; April 02nd 2018 2:35 pm.

------------------------------------------------------------------------------------
There are only two real tragedies in life. One is not getting what you want and the other is getting it.
Re: 1985 G20 305ci/4 Speed - A/C Hose Confusion [Re: tuner4life] #734592
April 02nd 2018 2:56 pm
April 02nd 2018 2:56 pm
Joined: Oct 2016
Posts: 225
Ohio
Gladiator Offline
enthusiast
Gladiator  Offline
enthusiast
Joined: Oct 2016
Posts: 225
Ohio
I see a part that looks like it on one of the catalogs, does your van have rear a/c?



1995 Emerald Green Chevy G20 350TBI Gladiator conversion
Re: 1985 G20 305ci/4 Speed - A/C Hose Confusion [Re: tuner4life] #734593
April 02nd 2018 3:01 pm
April 02nd 2018 3:01 pm
Joined: Sep 2013
Posts: 725
Indiana
tuner4life Offline OP
old hand
tuner4life  Offline OP
old hand
Joined: Sep 2013
Posts: 725
Indiana
Haha. Thanks Catfish. I'm working on a few A?C shop leads locally.. Here in Northern IN it's not a huge industry as it's never all that hot here..

Gladiator, I looked on that site you mentioned the other day, and I found a couple, but none that looked right. I do not have rear A/C. There was one assembly that looked kind of close, but it had the extra tube that (I'm assuming) goes to the rear A/C. Could I just use that and block off the other tube?


[Linked Image]
Re: 1985 G20 305ci/4 Speed - A/C Hose Confusion [Re: tuner4life] #734595
April 02nd 2018 3:28 pm
April 02nd 2018 3:28 pm
Joined: Oct 2016
Posts: 225
Ohio
Gladiator Offline
enthusiast
Gladiator  Offline
enthusiast
Joined: Oct 2016
Posts: 225
Ohio
I ended up using a different catalog, if you're using diesel parts with no rear a/c it seems 15562567 is the proper part, however after a quick search I don't see any new old stock.

15562568 is the one for if you have rear a/c, you might be able to cap it off, but from the price I saw for it, you'd want to still ask an a/c shop to make you a custom one.

[Linked Image]

[Linked Image]


1995 Emerald Green Chevy G20 350TBI Gladiator conversion
Re: 1985 G20 305ci/4 Speed - A/C Hose Confusion [Re: tuner4life] #734617
April 03rd 2018 8:30 am
April 03rd 2018 8:30 am
Joined: Sep 2013
Posts: 725
Indiana
tuner4life Offline OP
old hand
tuner4life  Offline OP
old hand
Joined: Sep 2013
Posts: 725
Indiana
Hmm.. That is the closest I've seen to the right configuration for the hose, however, mine uses the short stubby looking compressor, while that diagram shows the longer style. Looks like I may just have to get this custom made..


[Linked Image]
Re: 1985 G20 305ci/4 Speed - A/C Hose Confusion [Re: tuner4life] #734618
April 03rd 2018 8:51 am
April 03rd 2018 8:51 am
Joined: Sep 2005
Posts: 8,479
Georgia, USA
CatFish Offline
carpal tunnel
CatFish  Offline
carpal tunnel
Joined: Sep 2005
Posts: 8,479
Georgia, USA
Originally Posted by tuner4life
Hmm.. That is the closest I've seen to the right configuration for the hose, however, mine uses the short stubby looking compressor, while that diagram shows the longer style. Looks like I may just have to get this custom made..


New hoses, made to seal in the R134a, will be lined.

Hmm. So you're thinking you'll keep the old style compressor?
Just a thought here for discussion ....... since you're getting the hose made anyway and the old compressor is actually an old R12 unit, you might consider swapping to a later/different/more efficient type made to handle the R134a. The GM rotary compressors are power hogs.
Know any tuners that might have a compressor they don't need/want? One that would do the job without sucking quite as much horsepower?
Again, just a thought....


------------------------------------------------------------------------------------
There are only two real tragedies in life. One is not getting what you want and the other is getting it.
Re: 1985 G20 305ci/4 Speed - A/C Hose Confusion [Re: tuner4life] #734621
April 03rd 2018 9:40 am
April 03rd 2018 9:40 am
Joined: Sep 2013
Posts: 725
Indiana
tuner4life Offline OP
old hand
tuner4life  Offline OP
old hand
Joined: Sep 2013
Posts: 725
Indiana
hmm.. That is a thought. But at this point though, I just need to get it put together with the least amount of hassle and don't feel like having to fabricate anything. I've already got the new compressor and it's mounted too... I have never had an issue converting R12 systems to R134. I've done it on probably a dozen different vehicles and have never had an issue that wasn't self inflicted. Honestly, if the wife wasn't demanding the A/C be fixed, I wouldn't even worry about it since I only have about a 2 year timeline before I plan on swapping to an LS engine and then I'll have to re-figure out the compressor again anyways. If this setup makes it 2 years, I'll be thrilled.


[Linked Image]
Re: 1985 G20 305ci/4 Speed - A/C Hose Confusion [Re: tuner4life] #734635
April 03rd 2018 12:07 pm
April 03rd 2018 12:07 pm
Joined: Oct 2016
Posts: 225
Ohio
Gladiator Offline
enthusiast
Gladiator  Offline
enthusiast
Joined: Oct 2016
Posts: 225
Ohio
Seems they show that diagram picture for both gas and diesel models so it's not completely accurate, do you have the part number of the compressor you installed to help verify?


1995 Emerald Green Chevy G20 350TBI Gladiator conversion
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