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Old 04-13-2011, 10:02 AM
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A/C on pontiac motor

might be a dumb question but would it be in my best intrest to take out the ac in my 69 catalina, has the 400 motor in it with some work done to it.
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Old 04-13-2011, 10:25 AM
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Why would you want to remove the AC? Sure, it's 'heavy'- but hell, we're talking about a '69 Catalina here, not like it's ever gonna be light!

Keep the AC, fix it if it doesn't work, or not- your choice. But come time to sell it, if you've stripped out the AC it'll cost you big- nobody wants a non AC cruiser, IMO.

Good luck.
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Old 04-13-2011, 10:41 AM
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Count me in with Cobalt, its not like your 400 doesnt have enough torque to turn the compressor, you probably wont even notice it being on. I would keep it and get it working nice, AC is always a huge plus in a Catalina.
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Old 04-13-2011, 06:06 PM
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X3 . even the queen mary has AC. Your pontiac tuna boat will never notice any difference in weight from removing the AC. It will hurt any prospective resale value.
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Old 04-13-2011, 07:15 PM
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Yeah I agree, I wasn't gonna remove it cause it does work good I just wanted to know if it would give me any more power if it was unhooked. So I did take the belt off and to my suprise it did feel a little different but not that much, but I am gonna leave it unhooked be cause it made a huge difference in the sound from under the hood, I can't believe how loud those old compressors are. Didn't think 3/4 of the noise under the hood was the a/c.
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Old 04-13-2011, 07:41 PM
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That sounds like the compressor or clutch has probs- there should be only a small difference in sound w/the compressor running and w/it off, and there shouldn't be ANY difference in power OR sound w/the compressor off and the belt off or on.
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Old 04-13-2011, 07:49 PM
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Might be something wrong with the compressor im not sure, I do know the a/c blows cold but it did make alot of noise on or off. Looks like its an original compressor too. Im in ohio anyway and we don't have alot of a/c days anyway so im leaving the belt off till I resell it if that ever comes.
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Old 04-14-2011, 05:04 AM
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If its an A6 compressor (long body, very heavy), they now have a light weight replacement that can be swapped in directly. I got rid of the A6 on my truck and switched to a different compressor because the rebuilt A6 units were unreliable and new ones were expensive. It also had so many brackets to hold up the weight that it was hard to work on that side of the engine.

Bruce
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Old 04-14-2011, 09:11 AM
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yep thats the one, takes up the whole passenger side of the engine compartment. i might look into a replacement, thanks guys.
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Old 04-15-2011, 04:29 AM
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I got an aluminum bracket from Arizona Mobile Air that allowed me to use a Seltec or Sanden compressor, which are very common for retrofits. It works well to hold the compressor, and you only have to bolt it to the front of the engine (no other support brackets). I also converted to R134a, so I had to have custom hoses made to connect it all together. However, now that the light weight A6 clones are out I would also consider that alternative, to keep things looking more original.

Bruce
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Old 04-15-2011, 04:50 AM
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If you thought the GM axial compressors were unreliable, you really wouldn't like the GM R4 radial compressor. But heavy? As heck! The A6 in my '80 Malibu still worked- original unit (I'm 2nd owner since a year old)- until the AC clutch took a dump. The system still has pressure, no idea how much though, maybe not enough to allow it to cool or even run.

I always had good luck w/the Mopar V-2's, although this was restricted to the couple, three Mopar vehicles I had through the years that had a working AC in them.
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