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08-28-2020
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#1 |
 
Join Date: Jan 2006
Location: Decatur, AL
Posts: 1,112
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adjustability on the ac compressor and or pulley
Going to pull the plenum hopefully for the last time next week, I think the ac compressor or pulley is slightly forward causing a minor belt chirp. Alternator is was replaced and correct Summit Pulley added. I did a search and found a thread saying there is adjustability in the a/c mounting bolts. There was also mention of measuring points from the compressor to a bolt but all the photobuckets pics were removed. How can I make sure the compressor is aligned and how can I check the if the pulley/clutch is seated properly? Thanks in advance, I won't do this project until probably next weekend so I have time to order anything I need.
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Corvette95 Registry and Forum (*************) 1989 C4 Conv Wht/Gry Auto Hardtop Top Flight SOLD 1995 C4 Coupe Purple/Blk 6 Speed 1989 C4 Conv Wht/Red Auto SOLD 1996 C4 Conv Black/Tan Auto SOLD 1994 C4 Coupe Wht/Blk SOLD 1995 C4 ZR-1 White/Gry #278 Dual Dunn Head SOLD 1986 C4 Coupe Black/Red 4+3 SOLD 1990 C4 ZR-1 Red/Red #0454 |
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08-28-2020
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#2 |
 
Join Date: Jun 2006
Location: Sparks, NV
Posts: 2,852
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Re: adjustability on the ac compressor and or pulley
I'm not aware of any adjustability for the ac compressor at the bolts. There are shims behind the compressor clutch. There are also shims behind the alternator pulley. The PS pulley is a friction fit on the shaft.
H 
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90'ZR-1 #1461 Red/Black Ported Intake, Degreed Cams, OBX Headers & Exhaust, Fidanza FW, Secondary Delete, Custom tune, C6 GS Wheels. Sold 08 C6 Z51 Crystal Red Metallic Sold Vararam Intake, Tune, Sold 05 C6 Z51 Red/Black Sold 90'ZR-1 #1723 Black/Gray Sold but not forgotten 91' Z51 L98 White Vert. My First, you always remember your first. Sold. |
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08-28-2020
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#3 |
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Join Date: Jan 2006
Location: Decatur, AL
Posts: 1,112
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Re: adjustability on the ac compressor and or pulley
I wasnt ware of any adjustment for the a/c compressor mount either but I found some old threads here from years ago with several mentioning front and back movement that could be done on a/c install. I have the summit pulley from "solutions" on the alternator (that I am going to replace next week) so I thought my alignment was good. Here are some pics... It matches the spacing from Jerry's website.
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Corvette95 Registry and Forum (*************) 1989 C4 Conv Wht/Gry Auto Hardtop Top Flight SOLD 1995 C4 Coupe Purple/Blk 6 Speed 1989 C4 Conv Wht/Red Auto SOLD 1996 C4 Conv Black/Tan Auto SOLD 1994 C4 Coupe Wht/Blk SOLD 1995 C4 ZR-1 White/Gry #278 Dual Dunn Head SOLD 1986 C4 Coupe Black/Red 4+3 SOLD 1990 C4 ZR-1 Red/Red #0454 |
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08-28-2020
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#4 |
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Join Date: Jan 2006
Location: Decatur, AL
Posts: 1,112
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Re: adjustability on the ac compressor and or pulley
This is the old thread I was referring to.
https://www.zr1.net/forum/showthread...ignment+pulley
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Corvette95 Registry and Forum (*************) 1989 C4 Conv Wht/Gry Auto Hardtop Top Flight SOLD 1995 C4 Coupe Purple/Blk 6 Speed 1989 C4 Conv Wht/Red Auto SOLD 1996 C4 Conv Black/Tan Auto SOLD 1994 C4 Coupe Wht/Blk SOLD 1995 C4 ZR-1 White/Gry #278 Dual Dunn Head SOLD 1986 C4 Coupe Black/Red 4+3 SOLD 1990 C4 ZR-1 Red/Red #0454 |
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08-28-2020
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#5 |
Join Date: Nov 2016
Location: Southlake, TX
Posts: 588
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Re: adjustability on the ac compressor and or pulley
I just did this repair a couple of weeks ago (I posted a few threads) due to a belt chirp and squeal. I replaced the pulley, bearing and clutch assembly with new pieces. While in there, I did not see any adjustment capability; there was a snap ring (PITA to remove, but easier to install) so I thought it binary as "it either fit or it didn't."
I did put a new high end (continental) belt on at the same time. My chirp is gone now so I don't know if it was the belt, the pulleys or alignment. Either way, I'm happy. BTW.... I also had Marc Haibeck rebuild my tensioner. My car has 83k and it was due.
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Bill Schroeder Texas Proud! 1991 Corvette ZR1 #1388 2015 Challenger Scat Pack Shaker 
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08-28-2020
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#6 |
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Join Date: Jan 2006
Location: Decatur, AL
Posts: 1,112
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Re: adjustability on the ac compressor and or pulley
When you say pulley.. you mean a/c pulley? M. Haibeck rebuilt my tensioner last month.... I did not do anything to to my a/c compressor except remove it without discharging it when I did the top end. Only changes were new alternator with Summit pulley and R/I compressor with rebuilt of tensioner as mentioned. Thanks!
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Corvette95 Registry and Forum (*************) 1989 C4 Conv Wht/Gry Auto Hardtop Top Flight SOLD 1995 C4 Coupe Purple/Blk 6 Speed 1989 C4 Conv Wht/Red Auto SOLD 1996 C4 Conv Black/Tan Auto SOLD 1994 C4 Coupe Wht/Blk SOLD 1995 C4 ZR-1 White/Gry #278 Dual Dunn Head SOLD 1986 C4 Coupe Black/Red 4+3 SOLD 1990 C4 ZR-1 Red/Red #0454 |
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08-28-2020
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#7 |
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Join Date: Nov 2016
Location: Southlake, TX
Posts: 588
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Re: adjustability on the ac compressor and or pulley
Yes, I left my compressor mounted on the engine and replace the AC pulley, bearing and new clutch.
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Bill Schroeder Texas Proud! 1991 Corvette ZR1 #1388 2015 Challenger Scat Pack Shaker
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Linear Mode
