[dataway]

Well, since I have all winter to accomplish this AC project ... hey, why not take a look at rebuilding the original unit right?

I'll start with seeing if I can track down the manufacture date to see if it was updated from the original 68.

If I screw up the rebuild ... well the compressor is about the easiest component to replace so no big deal.

[dataway]

While I'm at it ... has anyone here "rebuilt" an A6 ? I put that in quotes because I'm not sure what it means on an A6? Just seals? Are there other wear parts? Do the pistons/cylinders wear out? The wobble plate? etc.

[burd]

Hitting a swap Sunday, are you still needing R12?

[dataway]

burd, no, a PY member has set me up with a supply of R12, appreciate the offer.

[burd]

FYI, the cans are around $35 here at the swaps. I wonder if you can ship ups ground.

[gto4ben]

Originally Posted by dataway

While I'm at it ... has anyone here "rebuilt" an A6 ? I put that in quotes because I'm not sure what it means on an A6? Just seals? Are there other wear parts? Do the pistons/cylinders wear out? The wobble plate? etc.

My definition of "rebuilt" is changing the seals, upgrading the shaft seal to double lip type, and if required, the clutch, clutch bearing, and clutch coil. "Remanufactured" to me means taking the guts out, separating the two halves and if required, changing the bushings, thrust washers, pistons and rings as shown in the shop manuals.

I have rebuilt a few A6 compressors and collected or fabricated over time the correct tools to make it easier and without damage. Century Bob's videos are very good. I made a case holder to install the internals too.

After the rebuild, bench test the compressor in order to check suction and compression. You can use the driven clutch plate with the clutch tool installed combined with a socket and drill to rotate the shaft. I made a plate to cover the compressor ports out of flat stock and 1/4" flare nipples to hook up to gauges. Remember to fill the sump with oil to coat the bearings and flapper valves before the bench test or you'll get erroneous readings.

I had to make a long snap ring pliers out of a long needle nose pliers to get at the seal snap ring.

I attached some bench test data I took for you to compare as well as a picture of the test setup.

One more thing. For cleaning the internals, I used lacquer thinner. Other leave a residue and this is a good compromise. Final cleaning was done with AC flush. Seals were lubed with mineral oil but use the oil based on the refrigerant you intend to use.

[dataway]

Excellent info, thank you sir.

I have a 68 GM AC service manual here somewhere (supplement to the 68 service manual) Never looked through it very well, assume it has some good info.