Vibration with AC
Thread Starter
Racer
Joined: Sep 2017
Posts: 452
Likes: 55
From: Marianna Fl
Vibration with AC
While working on my 90 coupe I retrofitted the R12 system for R134 and went through the process of vacuum testing and charging it. Now the AC works great and no issues up to about 3000rpm where a vibration sets in. If I turn off the AC it goes away. The vibration is progressive and builds with rpm.
Has anyone had an issue like this or have an idea what this could be? Maybe i overcharged it? There is not a lot ofbbninfo on how much R134 the car needed, that I could find, so I'm not sure at this point.
Has anyone had an issue like this or have an idea what this could be? Maybe i overcharged it? There is not a lot ofbbninfo on how much R134 the car needed, that I could find, so I'm not sure at this point.
Thread Starter
Racer
Joined: Sep 2017
Posts: 452
Likes: 55
From: Marianna Fl
Any other potential issues while I'm under the hood?
Team Owner
Joined: Sep 2003
Posts: 25,394
Likes: 2,741
I will check when I get home today. In terms of gross damage I have had the compressor off for about the past month working on another issue and did not see any large cracks, discoloration or deformities but I'll look for anything like a hairline crack.
Any other potential issues while I'm under the hood?
Any other potential issues while I'm under the hood?
there's many posts scattered throughout the C4 section for busted/cracked A/C mounting brackets. A search for 10105236 in the C4 section should give you a few mounting images from GM SPO. I know I've posted them a few times. Your problem has been experienced by many!!
use the 'SEARCH THIS FORUM BUTTON' from this link.
https://www.corvetteforum.com/forums...-1984-1996-19/
Last edited by WVZR-1; Sep 23, 2018 at 09:58 AM.
Melting Slicks
Joined: Nov 2007
Posts: 2,830
Likes: 147
From: Gainesville FL
