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Rebuild...... 1990 Air Conditioning
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djkeev Premium Member
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PostPosted: Tue Jan 05, 2021 4:31 pm    Post subject: Rebuild...... 1990 Air Conditioning Reply with quote

As you probably know, I no have a 1990 Tintop.

I will be going through the Air Conditioning system much as I did on my 86.

The differences between the 86 (basically the 1.9 A/C with some newer 2.1 bits thrown in just to confuse you) and the newer system is huge.

I'll figure it out, I'll fix my system but to start off the controls in the left D pillar are compromised.

There was a fire in there. The padding behind the wires is significantly burned.

There are three spliced wires with electrical tape, Upper left of photo near screw bracket, that have been taped together.

I wonder ..... Was something removed from there or was it simply a burned wired repair?

Also the harness running vertically is completely wrapped in electrical tape!

Image may have been reduced in size. Click image to view fullscreen.


Dave
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Last edited by djkeev on Fri Jan 15, 2021 3:35 pm; edited 1 time in total
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PostPosted: Wed Jan 06, 2021 6:16 am    Post subject: Re: 1990 Air Conditioning Reply with quote

i've got an 89 Carat donor that i can pull the panel off and take photos.... after things warm up. but there's probably images in the archives.

as i'm sure you'll do, i'd unwrap any non-factory tape to see what's going on, put in proper splices, and of course clean out the old foam. holler if you need any plastic trim, i might hang onto the wiring and controls for a while tho.
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PostPosted: Wed Jan 06, 2021 6:35 am    Post subject: Re: 1990 Air Conditioning Reply with quote

Dave, I have the wiring harness for the A/C from the euroBus out and accessible. I can take pics of whatever you need to see.

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PostPosted: Wed Jan 06, 2021 9:03 am    Post subject: Re: 1990 Air Conditioning Reply with quote

Thanks Dave!

It will probably be difficult to envision on the floor but the wiring up tgat D panel, fuses, relays, pressure switch etc.

Dave
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PostPosted: Wed Jan 06, 2021 10:17 am    Post subject: Re: 1990 Air Conditioning Reply with quote

I have a 91 Tintop and I'm about 40 miles away. If you want I can do a road trip for a side by side comparison. I'm here for another week yet till we head to SWFL for the winter.
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PostPosted: Wed Jan 06, 2021 10:29 am    Post subject: Re: 1990 Air Conditioning Reply with quote

AceTaylor wrote:
I have a 91 Tintop and I'm about 40 miles away. If you want I can do a road trip for a side by side comparison. I'm here for another week yet till we head to SWFL for the winter.


Sadly, I'll need to pass right now.
My engine is in the basement getting resealed and new rings.

Many thanks for the offer though!

Dave
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PostPosted: Wed Jan 06, 2021 10:57 am    Post subject: Re: 1990 Air Conditioning Reply with quote

Your "new" van is also missing a relay.


Image may have been reduced in size. Click image to view fullscreen.

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PostPosted: Wed Jan 06, 2021 8:41 pm    Post subject: Re: 1990 Air Conditioning Reply with quote

Dave~

I recently bought parts from a guy parting a syncro that got cleaned up real bad on some ice.

anyway, it has the a/c in tact and the guy isn't a 'moon and stars' seller, meaning that he is super reasonable in the price department.

it took me 5 mins to buy stuff, and 2 hours of chatting. again, super nice guy. i can put you in touch...he doesn't want to scrap the hulk because he wants to make sure everything useable is parted.

shoot me a p/m and i'll put you in touch. he's in CT and willing to ship
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PostPosted: Thu Jan 07, 2021 7:35 am    Post subject: Re: 1990 Air Conditioning Reply with quote

Image may have been reduced in size. Click image to view fullscreen.


Hi Dave, What usually happens is the large red 12v wire connector at the fuse link overheats. The problem is the brass eye connector is too small for the amp loads. In Europe they must not run the A/C as often as we do. I have seen this connector melt the fuse and relay plates and burn all the nearby components.

The solution is to go to NAPA and get some brass battery connectors for a garden tractor. Change out that 12+ wire end to a bigger connector and change the fuse link, as I have done in the picture. Use solder too. Do the same on the other end of that red wire. It connects to the back of the alternator, AIRC.

Check the two fuses for the brown grounds. They can get toasty too. The solution there is to be sure the fuses/connectors are clean and fresh. The 6mm ground stud is clean too.

Having another late model Vanagon to mirror your repairs is very handy.
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The Carrot
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PostPosted: Thu Jan 07, 2021 8:20 am    Post subject: Re: 1990 Air Conditioning Reply with quote

Agreed that the wiring terminal is sub optimal. Also consider replacing the fusible link with a maxi fuse holder.
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PostPosted: Thu Jan 07, 2021 9:38 am    Post subject: Re: 1990 Air Conditioning Reply with quote

kamzcab86 wrote:
Your "new" van is also missing a relay.


Image may have been reduced in size. Click image to view fullscreen.


Thanks for posting this, I hadn't heard of the upgraded relays before. Where did you source them? Not having much luck with the part numbers at the usual vendors.

Found a $50 OEM 431-951-253F here:
https://www.europaparts.com/relay-431951253f.html

It also looks like 8D0-951-253 may have been superseded by 4H0-951-253 which is available in a 70 amp version.
https://www.europaparts.com/relay-443951253j.html

VanCafe sells the complete board with a new 70amp relay (even thought the pic shows a 40amp), but they don't sell just the relay.
https://www.vancafe.com/KT-9984104-p/kt-9984104.htm

I run the AC a ton in Houston and want to upgrade every component I can in the system. Abel told me several years ago RMW was working on a plug and play AC Wiring upgrade kit, but I never saw them come out with one. Would be happy to support such an effort.
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PostPosted: Thu Jan 07, 2021 2:14 pm    Post subject: Re: 1990 Air Conditioning Reply with quote

This thread will eventually become "how to rebuilt the newer A/C system.

I just discovered that my Condenser is bad.

One of the connecting pipes has broken off from the coils.
Both connections are on the lower left of the condenser.

Image may have been reduced in size. Click image to view fullscreen.


The size is roughly 22 x 17 x 1 1/4

I'm going to see what I can find.

Dave
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PostPosted: Thu Jan 07, 2021 2:30 pm    Post subject: Re: 1990 Air Conditioning Reply with quote

You are actually kinda lucky. Time to ditch the obsolete R-12 condenser and get a lighter and more efficient design. Costs about $110

https://www.gowesty.com/product/air-conditioning/24380/high-efficiency-a-c-condenser-
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PostPosted: Thu Jan 07, 2021 3:31 pm    Post subject: Re: 1990 Air Conditioning Reply with quote

dart330 wrote:

Thanks for posting this, I hadn't heard of the upgraded relays before. Where did you source them? Not having much luck with the part numbers at the usual vendors.


What's in the photo are the original relays; I failed to photograph the replacements along with the maxi fuse I installed. Embarassed

The 431951253F (Compressor Clutch 20amp ) relay was bought at NAPA (albeit 5 years ago); even aftermarket, it's a red relay:

Image may have been reduced in size. Click image to view fullscreen.


The 8D0951253 (Blower Fan ) relay... can't recall where I bought it, but it is available. The OEM relay is stamped 370:

Image may have been reduced in size. Click image to view fullscreen.


NAPA lists a Meyle version: https://www.napaonline.com/en/p/ATM8D0951253 .
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PostPosted: Thu Jan 07, 2021 3:43 pm    Post subject: Re: 1990 Air Conditioning Reply with quote

BusDepot carries an OEM style Condenser.

Though the price of $270 reflects this originality.

https://www.busdepot.com/253260403

I'm thinking the Nostalgic Air r134a unit we've been putting in older Vans. Just under $100 but modifications needed.

https://nostalgicac.com/

This isn't a big issue for all new hoses will be installed for the EZ Clip system.

Dave
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PostPosted: Thu Jan 07, 2021 4:03 pm    Post subject: Re: 1990 Air Conditioning Reply with quote

djkeev wrote:
BusDepot carries an OEM style Condenser.

Though the price of $270 reflects this originality.

https://www.busdepot.com/253260403

I'm thinking the Nostalgic Air r134a unit we've been putting in older Vans. Just under $100 but modifications needed.

https://nostalgicac.com/

This isn't a big issue for all new hoses will be installed for the EZ Clip system.

Dave


if you pick a Nostalgic Air, please post the PN! i'll probably do a good 134a conversion with new hoses on this 89 Westy. my rat-rod 87, well that's all gone (and 'Lovin' every minute of it!' - Kramer)
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PostPosted: Fri Jan 08, 2021 7:27 am    Post subject: Re: 1990 Air Conditioning Reply with quote

[email protected] wrote:
Dave~

I recently bought parts from a guy parting a syncro that got cleaned up real bad on some ice.

anyway, it has the a/c in tact and the guy isn't a 'moon and stars' seller, meaning that he is super reasonable in the price department.

it took me 5 mins to buy stuff, and 2 hours of chatting. again, super nice guy. i can put you in touch...he doesn't want to scrap the hulk because he wants to make sure everything useable is parted.

shoot me a p/m and i'll put you in touch. he's in CT and willing to ship


I need some front seats. My son lives in Danbury and I have friends in the Essex area as well as central western CT. Could you PM me his information, please?

Thanks, Duncan
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PostPosted: Fri Jan 08, 2021 10:45 am    Post subject: Re: 1990 Air Conditioning Reply with quote

(Duncan, I sent you a PM about seats)

Pulled out my Bentley and started looking at A/C wiring diagrams.
I figured I'd unwrap the tape, clean things up and figure out whats what.

My Bentley only goes to 89, I've got a 90.
Like an idiot I sent my 90/91 version with my 86 camper.
My next visit to Oregon I'll swap books with my Brother!

Anyway...... I'm guessing that the 90 and 89 A/C is virtually the same wiring?

Dave
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PostPosted: Fri Jan 08, 2021 10:48 am    Post subject: Re: 1990 Air Conditioning Reply with quote

AtlasShrugged wrote:
You are actually kinda lucky. Time to ditch the obsolete R-12 condenser and get a lighter and more efficient design. Costs about $110

https://www.gowesty.com/product/air-conditioning/24380/high-efficiency-a-c-condenser-


The GW condensor is out of stock. It has been since last summer when I was redoing mine.
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PostPosted: Fri Jan 08, 2021 11:03 am    Post subject: Re: 1990 Air Conditioning Reply with quote

Dave, I have a PDF I can send
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