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A/C 1984 SE by David Hambleton
Started on: 06-02-2013 03:05 PM
Replies: 8 (153 views)
Last post by: RWDPLZ on 07-06-2014 04:05 PM
David Hambleton
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Report this Post06-02-2013 03:05 PM Click Here to See the Profile for David HambletonClick Here to Email David HambletonSend a Private Message to David HambletonEdit/Delete MessageReply w/QuoteDirect Link to This Post
I've had a 1984 SE since new - it has 361,000 km (224,000 miles) on it now. Eight years ago it was converted to R-134A but the cooling quit after a few summers. That was a $700 repair. I revived it with the 'auto parts store' kit - gauges, seal & refrigerant, but it only lasted a couple of summers & then nothing. Since the cooling 'dwindled away', I suspect a leak somewhere.

I've been inspired by some PFF success stories to try myself so I'm going to get the gauges & some refrigerant & hunt for leaks. I have the factory service manual but it's a pretty challenging read. I think I have to get some pressure in the system for the clutch to engage. I'm wondering if it's pointless to begin without replacing the compressor (it's original). Just over the border, Niagara Falls NY stores have compressors for around $200. Can anyone offer any advice on brands?

Is it possible to check for leaks around the compressor shaft? Access looks tight to me, & if it only leaks while running how would it be checked?
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tebailey
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Report this Post06-02-2013 03:24 PM Click Here to See the Profile for tebaileyClick Here to Email tebaileySend a Private Message to tebaileyEdit/Delete MessageReply w/QuoteDirect Link to This Post
A vacuum pump is nice, I found my leak at the high pressure shrader valve. Could not get it to hold vacuum. Shot a little air into it, and checked around with soapy water. Fixed the leak, recharged, and now blowing 35degree air.
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RWDPLZ
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Report this Post06-02-2013 10:46 PM Click Here to See the Profile for RWDPLZClick Here to visit RWDPLZ's HomePageSend a Private Message to RWDPLZEdit/Delete MessageReply w/QuoteDirect Link to This Post
If the compressor is the original DA6, I'd replace it, the shaft seal is almost certainly the leak point, and at this age/mileage, the compressor would have to be on it's last legs. The DA6 also isn't reccommended for use with R-134A.

Look at the orifice tube to give yourself a good idea of the system health. The accumulator will need to be replaced. drain the oil from the accumulator and measure how much comes out, and add the same amount back into the new one. Same for the compressor.

On my 84, it's 10X easier to replace the compressor with the exhaust manifold removed. If you use UV dye, you can see it real well from under the car. After replacing parts and vacuuming down the system, wether or not it holds vacuum overnight is a good indicator of if there's a leak. Not as good as pressurizing the system, but good to go from.

Replace the schrader valve on the compressor hose assembly if it's still there, or the one in the R-134A adapter.
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David Hambleton
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Report this Post06-28-2014 08:45 AM Click Here to See the Profile for David HambletonClick Here to Email David HambletonSend a Private Message to David HambletonEdit/Delete MessageReply w/QuoteDirect Link to This Post
Thanks RWDPLZ!

Rock Auto has 11 compressors from $200 to $481 (Canadian); accumulators from $10 to $41; and orifice tubes from $0.82 to $45.64. They also have two kits with the 3 components for $256 & $265. What would you suggest?

I have a much smaller replacement cat, so I think access is ok.
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RWDPLZ
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Report this Post06-28-2014 09:58 PM Click Here to See the Profile for RWDPLZClick Here to visit RWDPLZ's HomePageSend a Private Message to RWDPLZEdit/Delete MessageReply w/QuoteDirect Link to This Post
I would get the Four Seasons 58255 new compressor, the Four Seasons 38902 variable orifice tube, and since it's an 84, the AC Delco 151878 accumulator. The compressor will come with instructions on the oil type and viscosity to be used with it, the Fiero oil capacity is 8oz total.
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David Hambleton
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Report this Post07-05-2014 11:13 PM Click Here to See the Profile for David HambletonClick Here to Email David HambletonSend a Private Message to David HambletonEdit/Delete MessageReply w/QuoteDirect Link to This Post
Ok. Those 3 items are $324 Cdn shipped from 2 locations. The kit is $294 Cdn shipped. (Plus fees at the door...)
Postal service is another $61, but there's no additional fees (in my Fiero Store experience).

It looks like the compressor could be a DA6 or HR6 at Rock Auto's option.
I recall reading on PFF that HR6 is preferred...
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Boostdreamer
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Report this Post07-05-2014 11:36 PM Click Here to See the Profile for BoostdreamerClick Here to Email BoostdreamerSend a Private Message to BoostdreamerEdit/Delete MessageReply w/QuoteDirect Link to This Post
AutoZone has manifold gauges, a vacuum pump, and a flush kit in their loan-a-tool selection. I just picked up the whole set today. Very expensive at $367 but I will get all of that back when I return them.
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notwohorns
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Report this Post07-06-2014 12:46 AM Click Here to See the Profile for notwohornsClick Here to Email notwohornsSend a Private Message to notwohornsEdit/Delete MessageReply w/QuoteDirect Link to This Post
I wouldn't start off by replacing the compressor. I would first add dye and check for leaks. Recharging every two years is not bad
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RWDPLZ
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Report this Post07-06-2014 04:05 PM Click Here to See the Profile for RWDPLZClick Here to visit RWDPLZ's HomePageSend a Private Message to RWDPLZEdit/Delete MessageReply w/QuoteDirect Link to This Post
At this point the compressor is 30 years old, is not the type suited for R134A, and has as many as 200,000 miles on it. It's definitely time to replace it.

 
quote
It looks like the compressor could be a DA6 or HR6 at Rock Auto's option.


It's a new compressor, not a reman, so it actually will not be either. It's a compatible design made for R134A systems. HR6 is preferred when using used or reman'ed compressors. Remans are real hit or miss, and with most things being made (or remade) in China now, I'd avoid them like the plague.
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