Search found 831 matches

by bohica2xo
Sun Oct 25, 2020 3:37 pm
Forum: Automotive Air Conditioning Forum
Topic: gauge readings
Replies: 21
Views: 1933

Re: gauge readings

A lot depends on what you find in the dryer.

If it has a pint of oil in it, then you may need to flush the system.

If it is bone dry, you need to look at the condenser.
by bohica2xo
Fri Oct 23, 2020 1:48 pm
Forum: Automotive Air Conditioning Forum
Topic: AC has a loud short bang at startup then cools normally
Replies: 9
Views: 2544

Re: AC has a loud short bang at startup then cools normally

Well, 2 compressor, same tensioner. Same noise.

I hate to just throw parts at things, but given the price of a tensioner assembly (under 50 bucks) and the ease of replacement ...

Still sounding like the hydraulic tensioner leaks down over time when not in use. Once it is cycling it is ok.
by bohica2xo
Sat Oct 17, 2020 9:33 am
Forum: Automotive Air Conditioning Forum
Topic: Expansion valve
Replies: 2
Views: 347

Re: Expansion valve

Does the vehicle have rear A?C?

Standard block type expansion valves in both systems.
by bohica2xo
Thu Oct 15, 2020 2:58 pm
Forum: Automotive Air Conditioning Forum
Topic: gauge readings
Replies: 21
Views: 1933

Re: gauge readings

Sounds like it has 2x the oil charge, some sealer and is overcharged on refrigerant as well. Time to take it apart. Recover the system. Look at the expansion device first. Post a pic of whatever is stuck on it. Then drill the accumulator and drain it. Remove the accumulator, drill the bottom of it w...
by bohica2xo
Mon Oct 12, 2020 7:33 pm
Forum: Automotive Air Conditioning Forum
Topic: gauge readings
Replies: 21
Views: 1933

Re: gauge readings

What exactly is an "mgm"?

It sounds like a coupler malfunction. Low side.
by bohica2xo
Mon Oct 12, 2020 3:20 pm
Forum: Automotive Air Conditioning Forum
Topic: AC restoration questions, '93 Mazda RX7
Replies: 22
Views: 2851

Re: AC restoration questions, '93 Mazda RX7

Those grooves were the "barbs" . Just like some of the fittings in the links I posted. Yes, you can Tig weld an aluminum beadlock fitting to the OEM aluminum pipes. I have done it in the past, but it it a one shot deal. Once the beadlock is crimped, you are done. I think as complex as the ...
by bohica2xo
Sun Oct 11, 2020 5:27 pm
Forum: Automotive Air Conditioning Forum
Topic: AC restoration questions, '93 Mazda RX7
Replies: 22
Views: 2851

Re: AC restoration questions, '93 Mazda RX7

Barrier hose will be a snug fit, but it should be anyway. A little lubrication is a good plan for sliding them on. If you can't find a loose ferrule with the correct dimensions, you can use clamps. We have covered this before: https://www.autoacforum.com/messageview.cfm?catid=2&threadid=13152 ht...
by bohica2xo
Sat Oct 10, 2020 10:43 am
Forum: Automotive Air Conditioning Forum
Topic: AC restoration questions, '93 Mazda RX7
Replies: 22
Views: 2851

Re: AC restoration questions, '93 Mazda RX7

Your RX7 uses a block type TXV, so the low side switch can keep things from operating when it it either too cold outside, or the system is severely undercharged. Both of those conditions can keep oil from returning to the compressor. An adjustable low pressure switch will do what you want. You can s...
by bohica2xo
Thu Oct 08, 2020 11:55 am
Forum: Automotive Air Conditioning Forum
Topic: AC restoration questions, '93 Mazda RX7
Replies: 22
Views: 2851

Re: AC restoration questions, '93 Mazda RX7

Yes. you should add a high pressure cutout to the clutch circuit. Blowing the relief valve is something to avoid, and the switch does that. Since you are plumbing fresh anyway, it is not a big job. Supercool has always been good product Here is a PAG test I did years ago... https://www.autoacforum.c...
by bohica2xo
Wed Oct 07, 2020 2:58 pm
Forum: Automotive Air Conditioning Forum
Topic: 2002 Pontiac Ram Air Trans Am ac is not cooling properly
Replies: 68
Views: 7861

Re: 2002 Pontiac Ram Air Trans Am ac is not cooling properly

I strongly recommend you pull the compressor to do any control valve swap. Cleanliness is very important at that point. You want to clean the road grime off of the case around the valve assembly before you start. Once you pull the snap ring, clean thigs again before you pull the valve out. Dropping ...

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