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" pulley. 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.
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
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.
____________________________________ Joel Adams C3VR Lifetime Member #56 My Link
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"
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.
Full Size C3VR Lifetime Member #110 We are all young at heart Glen
Corvette is a registered trademark of the General Motors Corporation(GM) &
Chevrolet Motor Division. Vette Registries, LLC is responsible for all site content (except for member submitted content or where otherwise
noted) and does not claim or imply that Chevrolet or
GM is responsible for Official C3 Vette Registry content. Vette Registries, LLC is independent from GM and is not affiliated
with, sponsored or supported by GM. Copyright/trademark/sales mark
infringements are not intended, or implied and are in fact used to support
GM, Chevrolet and Corvette.
Official C3 Vette Registry content is Copyright 2001-2017, Vette Registries, LLC. Content may not be reused without written consent. All Rights Reserved. NS
Corvette (Vette) Model Years on this site: 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982