Search found 31 matches

by r-mm
Tue Jun 23, 2020 4:44 am
Forum: Automotive Air Conditioning Forum
Topic: "sticky" shraeder valves at hi/lo port
Replies: 6
Views: 301

Re: "sticky" shraeder valves at hi/lo port

Thanks for responding, its good to know someone had a similar problem. It also occured to me that the low side experiences suction which acts against the valve. I realize most small parts like this are made in china these days, maybe by one company. What would "pros" use? Are there differe...
by r-mm
Mon Jun 22, 2020 3:05 pm
Forum: Automotive Air Conditioning Forum
Topic: "sticky" shraeder valves at hi/lo port
Replies: 6
Views: 301

"sticky" shraeder valves at hi/lo port

I replaced the valve cores in my R134a adapters using these parts https://www.amazon.com/gp/product/B075WM9GTT/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1 I've used those same cores on other projects with success. Today I pulled the manifold quick connects off the high side with the engine o...
by r-mm
Sat Jun 20, 2020 5:07 am
Forum: Automotive Air Conditioning Forum
Topic: Setup for pressure testing condenser (3/4 + 5/8 ports)
Replies: 1
Views: 135

Setup for pressure testing condenser (3/4 + 5/8 ports)

In the past I have rigged various fittings to pressure test components like this oil cooler. I usually submerge it in water to look for bubbles and check that pressure holds. I'm sure there is a common way of doing this for a condenser. Before I go science project on it, does anyone have a good off ...
by r-mm
Fri May 01, 2020 1:20 pm
Forum: Automotive Air Conditioning Forum
Topic: Damaged R12 shraeder valve when installing R134a adapter
Replies: 3
Views: 1555

Re: Damaged R12 shraeder valve when installing R134a adapter

Haha true.

The manufacturer of the adapter confirmed they accidentally sent the wrong install instructions. The old Shraeder must come out. I can't entirely see into the port but i think the stem cracked the threaded portion somewhat.
by r-mm
Thu Apr 30, 2020 6:01 pm
Forum: Automotive Air Conditioning Forum
Topic: Damaged R12 shraeder valve when installing R134a adapter
Replies: 3
Views: 1555

Damaged R12 shraeder valve when installing R134a adapter

I have installed a few sets of R134a adapters over the years without issue. I went out of my way to get a quality set for my '91 Porsche and asked the mfgr to confirm the existing shraerder on the R12 is supposed to remain in place. They said yes. As precaution I replaced the R12 fitting shraeders b...
by r-mm
Thu Apr 30, 2020 4:16 pm
Forum: Automotive Air Conditioning Forum
Topic: Does a home vacuum pump extract oil along with refridgerant?
Replies: 6
Views: 2170

Re: Does a home vacuum pump extract oil along with refridgerant?

Thank you all for the responses. I looked online but can not tell what a 609 Certificate is or where I should be shopping for R12? I do not have an a priori need to convert to R134a, I just do not want to be hard pressed to find R12 and in my experience working on old cars, fixing the AC can involve...
by r-mm
Sun Apr 26, 2020 6:26 am
Forum: Automotive Air Conditioning Forum
Topic: Does a home vacuum pump extract oil along with refridgerant?
Replies: 6
Views: 2170

Does a home vacuum pump extract oil along with refridgerant?

I am trying to follow the factory procedure for converting my 91 Porsche from R12 to R134a. I have removed the compressor and drained all the oil I can from the ports (there is no drain plug). I have a home vacuum pump and manifold set from harbor freight. They both work well but do not separate ref...
by r-mm
Tue Aug 13, 2019 5:27 pm
Forum: Automotive Air Conditioning Forum
Topic: On TXV systems does compressor cycle ? Intended function of high pressure switch
Replies: 2
Views: 1251

On TXV systems does compressor cycle ? Intended function of high pressure switch

I have a 1989 BMW 325i with an expansion valve as attached. On such a system does one expect the compressor to cycle on and off via the high pressure switch on the receiver/dryer, or does the expansion valve control the flow of refrigerant and therefore how hard the compressor is working?
by r-mm
Sun Jul 28, 2019 3:25 pm
Forum: Automotive Air Conditioning Forum
Topic: Is some leakage at compressor normal? Issues with 4 Seasons re-man
Replies: 6
Views: 1723

Re: Is some leakage at compressor normal? Issues with 4 Seasons re-man

It spins just fine, it cools, it just leaks. What do they charge?
by r-mm
Sun Jul 28, 2019 3:14 pm
Forum: Automotive Air Conditioning Forum
Topic: Is some leakage at compressor normal? Issues with 4 Seasons re-man
Replies: 6
Views: 1723

Re: Is some leakage at compressor normal? Issues with 4 Seasons re-man

It was the best I could find, to replace the Nipponenso 10p.

Go to advanced search