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by Dgreen
Mon Aug 05, 2019 12:14 pm
Forum: Automotive Air Conditioning Forum
Topic: 92 S10 Truck Blows Air Out Floor Vent Only
Replies: 15
Views: 142

Re: 92 S10 Truck Blows Air Out Floor Vent Only

New compressor installed. Still making noise. It’s a wore out power steering pump. Lots of in and out movement on the pump pulley.

Thanks again for the replies.
by Dgreen
Sat Aug 03, 2019 6:54 pm
Forum: Automotive Air Conditioning Forum
Topic: 92 S10 Truck Blows Air Out Floor Vent Only
Replies: 15
Views: 142

Re: 92 S10 Truck Blows Air Out Floor Vent Only

It was still noisy after changing the coil. Ordered a new compressor. Mounting hardware was tight.

Thanks for all the replies.
by Dgreen
Thu Aug 01, 2019 5:18 pm
Forum: Automotive Air Conditioning Forum
Topic: 92 S10 Truck Blows Air Out Floor Vent Only
Replies: 15
Views: 142

Re: 92 S10 Truck Blows Air Out Floor Vent Only

I have the coil off and will try a different coil tomorrow. If it still makes noise, I’ll recover some refrigerant. I think 40:oz was the factory r12 charge. System currently has 36 oz of r134a in it. Low side was sweating heavily all the way back to the compressor. Over charge might be a possibility.
by Dgreen
Thu Aug 01, 2019 3:03 am
Forum: Automotive Air Conditioning Forum
Topic: 92 S10 Truck Blows Air Out Floor Vent Only
Replies: 15
Views: 142

Re: 92 S10 Truck Blows Air Out Floor Vent Only

Well, I changed the bearing and still have a noise. Also tried a different hub plate. Only thing I haven’t tried is a different coil and pulley. I put a stethoscope on the compressor and it sounds good.

Is it possible that the coil is weak and letting the clutch to slip and causing it to make noise?
by Dgreen
Tue Jul 30, 2019 1:48 pm
Forum: Automotive Air Conditioning Forum
Topic: 92 S10 Truck Blows Air Out Floor Vent Only
Replies: 15
Views: 142

Re: 92 S10 Truck Blows Air Out Floor Vent Only

I had some success! Greased up the vacuum control switch with silicone grease and reinstalled. We have cold air blowing out the vents! The metallic noise is still there. Only when the clutch is engaged. I took the hub and hub plate off and didn’t see any problems. Reinstalled the clutch and set to ....
by Dgreen
Tue Jul 30, 2019 11:14 am
Forum: Automotive Air Conditioning Forum
Topic: 92 S10 Truck Blows Air Out Floor Vent Only
Replies: 15
Views: 142

Re: 92 S10 Truck Blows Air Out Floor Vent Only

The rotary vacuum switch on the AC and heater control is leaking. No luck finding one locally so far.
by Dgreen
Sun Jul 28, 2019 5:06 pm
Forum: Automotive Air Conditioning Forum
Topic: 92 S10 Truck Blows Air Out Floor Vent Only
Replies: 15
Views: 142

Re: 92 S10 Truck Blows Air Out Floor Vent Only

I adjusted the clutch gap down to .022 and it seemed to be less noisy. Took the covers off the underside if the dash. Pretty sure I can hear a vacuum leak, but can’t tell which direction it’s coming from.
by Dgreen
Sun Jul 28, 2019 11:36 am
Forum: Automotive Air Conditioning Forum
Topic: 92 S10 Truck Blows Air Out Floor Vent Only
Replies: 15
Views: 142

Re: 92 S10 Truck Blows Air Out Floor Vent Only

Also seems to be a lot of chatter from the clutch. I set the gap at .030. Is that too much?
by Dgreen
Sun Jul 28, 2019 11:32 am
Forum: Automotive Air Conditioning Forum
Topic: 92 S10 Truck Blows Air Out Floor Vent Only
Replies: 15
Views: 142

Re: 92 S10 Truck Blows Air Out Floor Vent Only

It’s a 2.8 liter.
Any particular line or just start checking all the vacuum lines I can locate?
by Dgreen
Sun Jul 28, 2019 4:26 am
Forum: Automotive Air Conditioning Forum
Topic: 92 S10 Truck Blows Air Out Floor Vent Only
Replies: 15
Views: 142

92 S10 Truck Blows Air Out Floor Vent Only

Just converted this truck for a friend. Ac hasn’t worked in many years from the looks of things. Changed the compressor, accumulator, orifice tube, and added 6 oz pag 150. Pressures are good and lots of water coming from the evaporator, but air blowing in the cab is in the upper 60s and only blows o...

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