Engine Size: 4.9
Country of Origin: United States
Can anyone tell me what the nut size is for the center shaft that holds the clutch face on. My install tool doesnt seem to fit it and there was not one on it when I took it appart
There are "two" sizes on the GM compressors, you need the other one... The shaft is larger than the tool you have?? You can probably borrow one from autozone if you don't want to buy one..If you need the mastercool number, I can look that up for you...Hope this helps..
Freedoms just another word for nothing left to lose
that nut DOES NOT hold the clutch on--- The clutch is a press fit- the nut has been eliminated- no more need for it......it only keeps the threads clean ...........if it were on it would bottom out on the dshaft hub and not the clutch
The number one A/C diagnostic tool there is- is to know how much refrigerant is in the system- this can only be done by recovering and weighing the refrigerant!!
Just a thought.... 65% of A/C failures in my 3200 car diagnostic database (GM vehicles) are due to loss of refrigerant due to a leak......
If he is using the older puller, threads are English or SAE as they call it now, new threads are metric, very close in size, but close doesn't count here. And that older tool only pulls like the A6 hub, doesn't put it back on these new compressors. I did post the thread sizes a long time ago, old was 7/8", new is about 22 mm with the SAE being about 10 mil wider, just enough so it won't fit. Forgot the pitch of the threads, but also slightly different.
When GM converted from English to Metric, must have hired a kid engineer to just use the very closest sizes, go nuts on my 82 Chevy, never know if a fastener is metric or English, but is running about 50-50. As I recall, the HT6 is all metric, but the R-4 in the 90's used a metric size for the hub female thread and an English size on the shaft.
Autozone only has the small installer tool. I need the other one too. It's an R4 on a 1989 GMC truck.
I once had a very miserable time trying to locate an M9 installer needed for a coil replacement job on a friend's '99 Malibu.
It uses a V5. The thread was 9mm, not 8mm or 3/8".
We finally took it to the shop. It was just for re-installing the hub, so it still paid off to DIY, especially considering that
no one wanted to do anything other than replacing the compressor.
Edited: Sat September 01, 2007 at 11:23 PM by avx
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