Search found 98 matches

by ice-n-tropics
Sat Feb 22, 2020 11:23 am
Forum: Automotive Air Conditioning Forum
Topic: wont hold vacuum
Replies: 3
Views: 57

Re: wont hold vacuum

Vacuum = a lot to do about nothing. Modern compressor dual shaft seals have a outer elastomer above atmosphere pressure lip seal and a inner teflon compounded under atmospheric pressure seal. The inner seal is often scratched during sloppy or dirty service replacement (w/o a proper shaft seal protec...
by ice-n-tropics
Wed Feb 12, 2020 9:01 am
Forum: Automotive Air Conditioning Forum
Topic: R4 conversion to 508 Sanden
Replies: 1
Views: 413

Re: R4 conversion to 508 Sanden

Love Key Largo and scuba diving john Pennekamp coral reef offshore. The R-4 is too much displacement capacity for most Vintage Air A/Cs and avaliable condenser "real estate" space. Early SD 5H14 (508) used SP 20 PAG which was exactly same as GM PAG 100 single end cap lube. PAG 46 (SP15) do...
by ice-n-tropics
Sun Feb 02, 2020 7:24 pm
Forum: Automotive Air Conditioning Forum
Topic: DIY Vacuum Pump Showing Moisture Removal.
Replies: 7
Views: 562

Re: DIY Vacuum Pump Showing Moisture Removal.

We could use the a/c system's old high volumetric efficiency Borg Warner York ( with back seating valves) that was mounted on the engine to evacuate the system on the side of the road. These old Yorks could squirt R-12 out the head gasket during liquid slugging, BW increased top dead center clearanc...
by ice-n-tropics
Wed Jan 08, 2020 2:37 pm
Forum: Automotive Air Conditioning Forum
Topic: Classic car ac help
Replies: 3
Views: 1601

Re: Classic car ac help

Vintage Air's book "How to Air Condition Your Hot Rod" explains how to match system component capacities so that the compressor capacity (displacement/swept volume and drive ratio) is not excessive. condenser energy rejection must match the evaporator heat absorption plus horsepower energy...
by ice-n-tropics
Thu Nov 21, 2019 8:47 am
Forum: Automotive Air Conditioning Forum
Topic: Nissan Altima 2016 ac problem
Replies: 5
Views: 2633

Re: Nissan Altima 2016 ac problem

1) The manual control valve bleeds gas to control the crankcase pressure to change the differential pressure across the underside of the piston verses the piston top which in turn changes the swashplate cam angle or stroke and refrigerant mass flow. Early versions had internal filters which would st...
by ice-n-tropics
Mon Oct 21, 2019 4:02 pm
Forum: Off Topic Chat
Topic: Old school ac
Replies: 3
Views: 10641

Re: Old school ac

Syria could be a hot place to grow up. I designed and tested and trained retro fit installers for military a/c for Iraq at MIL spec 130 deg F ambient using Coriolis flow meters for refrigerant side capacity calculations.. Old Tech: Dad would replace the bucket of ice under the heater floor vent outl...
by ice-n-tropics
Wed Sep 11, 2019 2:33 pm
Forum: Automotive Air Conditioning Forum
Topic: Pressures Equalize Instantly
Replies: 13
Views: 3103

Re: Pressures Equalize Instantly

bohica and crazy single discharge valve on scroll can get trash under seat or rotate slightly away from discharge hole and still perform at 50%, but equalizes immediately. to see and repair valve problem : 1) Scribe/scratch line across front housing and also comp body as refrence for accurate reasse...
by ice-n-tropics
Tue Aug 27, 2019 10:19 am
Forum: Automotive Air Conditioning Forum
Topic: '86 Minnie Winnie G30 350 Sanden 510
Replies: 9
Views: 1544

Re: '86 Minnie Winnie G30 350 Sanden 510

Time will tell if you are better off having ignored advice to get a genuine SD7H15 from Tim at A/C Kits?
by ice-n-tropics
Fri Aug 09, 2019 11:37 am
Forum: Automotive Air Conditioning Forum
Topic: '86 Minnie Winnie G30 350 Sanden 510
Replies: 9
Views: 1544

Re: '86 Minnie Winnie G30 350 Sanden 510

only one belt is needed for 510 (162 cc) replacement SD7H15 (149.5) for R-134a and less vibration,
SD508 is only 138 cc.
by ice-n-tropics
Wed Jul 17, 2019 11:40 am
Forum: Automotive Air Conditioning Forum
Topic: 2006 Civic DX AC not working
Replies: 10
Views: 2501

Re: 2006 Civic DX AC not working

Dead reckoning for computer think: 1) charge is too low or high causing abnormally high discharge gas temp. Yes, scroll system low charge results in high temp discharge as charge is lost down to aprox. 12%, 2) fans not working 3) limp home mode over ride due to drive line problem or radiator temp. 4...

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