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6/24/09 9:47pm - Original Message: 'Correct A/C compressor for my 76'
suncountry Lifetime Member
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Moses Lake, WA - USA

Vette(s):
1976 L48 4-spd, Mahogany Metalic exterior, Buckskin interior 350ci/350hp, 3rd owner, fiberglass spring, 255/50-16's Torq-Thrust II

Joined: 4/16/2005
Posts: 2134
I have been trying to get a rebuilt R4 compressor for my vette. It has a 5-3/4" pulley on it. Both R4's the guys at the part store have brought in have a 5" pulleyUnhappy. So what is correct the 5" or 5-3/4" pulley? I converted to a cycling system so I like the idea of the 5-3/4 to try and prevent the belt chirp when the compressor kicks on.
 
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Glen
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6/24/09 10:23pm - Reply: 'Correct A/C compressor for my 76'
Adams' Apple Lifetime Member
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Duncanville, TX - USA

Vette(s):
#1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas

Joined: 11/8/2003
Posts: 19449
Change/swap the pulley...unless your's is messed up, that is. It's not that complicated, but it's not exactly a quick swap, either. It involves removing the clutch assembly first, then a snap ring, and then pulling the pulley off with either a puller, or a block of wood and a hammer.
Getting the clutch off and re-installed does take special tools, and the clearance on the clutch must be set properly, as far as measuring the clearance between the clutch and the pulley.
Most decent parts houses have the tools to do the clutch...might be worth it to ask.
I'm not sure if the stuff I have for the A6 compressor will work(on the R4) off-hand, but you're welcome to borrow it if you can't find the tools locally.


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Joel Adams
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6/24/09 10:35pm - Reply: 'Correct A/C compressor for my 76'
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Dorr, MI - USA

Vette(s):
71 Colonnade Hardtop Coupe Torch Red with black interior originally L48 built to push around 360hp

Joined: 8/21/2002
Posts: 2580

If you want Glen, I'll look into it tomorrow when I get to work. I'm in the business



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6/24/09 10:57pm - Reply: 'Correct A/C compressor for my 76'
suncountry Lifetime Member
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Moses Lake, WA - USA

Vette(s):
1976 L48 4-spd, Mahogany Metalic exterior, Buckskin interior 350ci/350hp, 3rd owner, fiberglass spring, 255/50-16's Torq-Thrust II

Joined: 4/16/2005
Posts: 2134
[QUOTE=my7T1]

If you want Glen, I'll look into it tomorrow when I get to work. I'm in the business

[/QUOTE]
 
Thanks for the help!


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C3VR Lifetime Member #110 We are all young at heart Glen
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6/25/09 7:59am - Reply: 'Correct A/C compressor for my 76'
my7t1 Lifetime Member
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Dorr, MI - USA

Vette(s):
71 Colonnade Hardtop Coupe Torch Red with black interior originally L48 built to push around 360hp

Joined: 8/21/2002
Posts: 2580
http://www.transpro.com/catalog?searcher%5Byear%5D=1976&searcher%5Bmake%5D=CHEVROLET&searcher%5Bmodel%5D=CORVETTE&searcher%5Bengines%5D=1041040%2C1041051&searcher%5Bpart_type%5D=CompressorClutchCombination&search_vehicles=SEARCH
 
Hi Glen. Here's a link to the compressors I sell. As you can see the original is an A6 not an R4. Unless you've modified yours that's the one it calls for. Comes with either 5" or 5 3/4 pulley. If you find a number I can check on price and availability. Or you can search the site for the right R4. Hope this helps, "T"


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6/25/09 8:06am - Reply: 'Correct A/C compressor for my 76'
Adams' Apple Lifetime Member
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Duncanville, TX - USA

Vette(s):
#1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas

Joined: 11/8/2003
Posts: 19449
The '76 could have either type compressor...that's the year they changed, so it depends on when the car was built which system it had installed....

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Joel Adams
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6/25/09 8:23am - Reply: 'Correct A/C compressor for my 76'
my7t1 Lifetime Member
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Dorr, MI - USA

Vette(s):
71 Colonnade Hardtop Coupe Torch Red with black interior originally L48 built to push around 360hp

Joined: 8/21/2002
Posts: 2580
Very good O-Master of the mechanic world. Here's the options for 77, which prolly means a midyear change over.
http://www.transpro.com/catalog?searcher%5Byear%5D=1977&searcher%5Bmake%5D=CHEVROLET&searcher%5Bmodel%5D=CORVETTE&searcher%5Bengines%5D=&searcher%5Bpart_type%5D=CompressorClutchCombination&search_vehicles=SEARCH


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6/25/09 10:37pm - Reply: 'Correct A/C compressor for my 76'
suncountry Lifetime Member
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Moses Lake, WA - USA

Vette(s):
1976 L48 4-spd, Mahogany Metalic exterior, Buckskin interior 350ci/350hp, 3rd owner, fiberglass spring, 255/50-16's Torq-Thrust II

Joined: 4/16/2005
Posts: 2134
So your showing the same thing the parts house is showing, the 5" pulley. Guess some one changed it along the way. They are bringing in 2 which will be their in the morning. Thanks for the help guys.Wink

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C3VR Lifetime Member #110 We are all young at heart Glen
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6/26/09 7:47pm - Reply: 'Correct A/C compressor for my 76'
suncountry Lifetime Member
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Moses Lake, WA - USA

Vette(s):
1976 L48 4-spd, Mahogany Metalic exterior, Buckskin interior 350ci/350hp, 3rd owner, fiberglass spring, 255/50-16's Torq-Thrust II

Joined: 4/16/2005
Posts: 2134
Well after 5 tries the parts house got a match almost. It's close enough to work. The only difference is the threads are metric. So it just required changing a coupe of bolts out. So it is now in, oil added and now just needs to be recharged.

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C3VR Lifetime Member #110 We are all young at heart Glen
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6/28/09 11:24pm - Reply: 'Correct A/C compressor for my 76'
williammoore2 Lifetime Member
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Mundelein, IL - USA

Vette(s):
1978 25 anniversary blue on blue with T-tops.

Joined: 6/9/2008
Posts: 411

What type of oil do you add? Where are you getting it from?I have a need to replace my compressor, condensor, and drier. I was told once what the oil was but forgot. Thanks,

Will



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