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#1 |
Registered User
Join Date: Dec 2011
Location: Boise, Idaho
Posts: 573
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134a what size orifice
Hello all,
1989 v2500 suburban While chasing a leak,, I installed a new fixed white orifice and now the low pressure is a little high and it will not pull temps lower the ~60 at the vent. I pulled out a VOV valve that was a little dirty and did not take note of the color. I am thinking of pumping back down and installing a .067. What did others use? How many Ounces of 134 did you use? Thanks, Chris |
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#2 |
Registered User
Join Date: Apr 2012
Location: Chatt Tn
Posts: 970
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Re: 134a what size orifice
the .067 should work good. I think thats what is in my truck.
__________________
88 military v30 crewcab shortbed 5.9 cummins, nv4500, 205 86 k30, 89 diesel burb, 76 gmc pathfinder 71 longbed 5.3 4l80 http://67-72chevytrucks.com/vboard/s...d.php?t=522535 |
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#3 |
Registered User
Join Date: Dec 2011
Location: Boise, Idaho
Posts: 573
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Re: 134a what size orifice
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#4 | |
*************
![]() Join Date: Apr 2005
Location: Pensacola, FL
Posts: 17,846
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Re: 134a what size orifice
Quote:
__________________
Rob - https://www.instagram.com/hart_rod_c10 As Iron Sharpens Iron, So One Man Sharpens Another. Proverbs 27:17 FOR SALE: DBW pedal bracket - http://67-72chevytrucks.com/vboard/s...d.php?t=651123 FOR SALE: Hood Brackets http://67-72chevytrucks.com/vboard/s...d.php?t=679945 1987 Silverado SWB - 34.5K original miles http://67-72chevytrucks.com/vboard/s...d.php?t=801834 1969 SuperBurb - http://67-72chevytrucks.com/vboard/s...d.php?t=200387 1968 Farm truck - http://67-72chevytrucks.com/vboard/s...d.php?t=358692 1968 SWB - http://67-72chevytrucks.com/vboard/s...d.php?t=551258 1948 Chevy - http://67-72chevytrucks.com/vboard/s...=122164&page=3 |
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#5 |
Moderator
![]() Join Date: Oct 2008
Location: Wentworth, NH
Posts: 4,954
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Re: 134a what size orifice
I've used the .067" Ford Blue orifice tubes and VOV for R12 to R134a conversions. The C4 Vette guys prefer the Ford Blue tubes rather than the VOV.
Variable orifice valves have been hit or miss for me as they aged. I used to recommend them. I've come to the conclusion that moving parts are not a great thing for long term reliability.
__________________
1959 M35A2 LDT465-1D SOLD 1967 Dodge W200 B383, NP420/NP201 SOLD 1969 Dodge Polara 500 B383, A833 SOLD 1972 Ford F250 FE390, NP435/NP205 SOLD 1976 Chevy K20, 6.5L, NV4500/NP208 SOLD 1986 M1008 CUCV SOLD 2000 GMC C2500, TD6.5L, NV4500 2005 Chevy Silverado LS 2500HD 6.0L 4L80E/NP263 2009 Impala SS LS4 V8 RTFM... GM Parts Books, GM Schematics, GM service manuals, and GM training materials...
And please let us know if and how your repairs were successful. |
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#6 |
Registered User
Join Date: Apr 2012
Location: Chatt Tn
Posts: 970
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Re: 134a what size orifice
whats the part # for the ford blue tube?
__________________
88 military v30 crewcab shortbed 5.9 cummins, nv4500, 205 86 k30, 89 diesel burb, 76 gmc pathfinder 71 longbed 5.3 4l80 http://67-72chevytrucks.com/vboard/s...d.php?t=522535 |
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#7 |
Moderator
![]() Join Date: Oct 2008
Location: Wentworth, NH
Posts: 4,954
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Re: 134a what size orifice
Four Seasons 38621
__________________
1959 M35A2 LDT465-1D SOLD 1967 Dodge W200 B383, NP420/NP201 SOLD 1969 Dodge Polara 500 B383, A833 SOLD 1972 Ford F250 FE390, NP435/NP205 SOLD 1976 Chevy K20, 6.5L, NV4500/NP208 SOLD 1986 M1008 CUCV SOLD 2000 GMC C2500, TD6.5L, NV4500 2005 Chevy Silverado LS 2500HD 6.0L 4L80E/NP263 2009 Impala SS LS4 V8 RTFM... GM Parts Books, GM Schematics, GM service manuals, and GM training materials...
And please let us know if and how your repairs were successful. |
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#8 |
Registered User
Join Date: Dec 2011
Location: Boise, Idaho
Posts: 573
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Re: 134a what size orifice
It is what I used when i swapped from 12 to 134. I only went white fixed because I had it on the shelf and that is what is called for.
I am using a Sanden SD7,, With the fixed i could not get decent temps.. My motor runs around 2,000 or less in town. Chris |
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#9 | |
Moderator
![]() Join Date: Oct 2008
Location: Wentworth, NH
Posts: 4,954
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Re: 134a what size orifice
Quote:
That's just fine for hydrocarbon R290 and R12. You need a slightly smaller orifice for R134a and HFC152. As I said the Ford blue is 0.067 and it seems to do the job.
__________________
1959 M35A2 LDT465-1D SOLD 1967 Dodge W200 B383, NP420/NP201 SOLD 1969 Dodge Polara 500 B383, A833 SOLD 1972 Ford F250 FE390, NP435/NP205 SOLD 1976 Chevy K20, 6.5L, NV4500/NP208 SOLD 1986 M1008 CUCV SOLD 2000 GMC C2500, TD6.5L, NV4500 2005 Chevy Silverado LS 2500HD 6.0L 4L80E/NP263 2009 Impala SS LS4 V8 RTFM... GM Parts Books, GM Schematics, GM service manuals, and GM training materials...
And please let us know if and how your repairs were successful. |
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#10 | |
*************
![]() Join Date: Apr 2005
Location: Pensacola, FL
Posts: 17,846
|
Re: 134a what size orifice
Quote:
__________________
Rob - https://www.instagram.com/hart_rod_c10 As Iron Sharpens Iron, So One Man Sharpens Another. Proverbs 27:17 FOR SALE: DBW pedal bracket - http://67-72chevytrucks.com/vboard/s...d.php?t=651123 FOR SALE: Hood Brackets http://67-72chevytrucks.com/vboard/s...d.php?t=679945 1987 Silverado SWB - 34.5K original miles http://67-72chevytrucks.com/vboard/s...d.php?t=801834 1969 SuperBurb - http://67-72chevytrucks.com/vboard/s...d.php?t=200387 1968 Farm truck - http://67-72chevytrucks.com/vboard/s...d.php?t=358692 1968 SWB - http://67-72chevytrucks.com/vboard/s...d.php?t=551258 1948 Chevy - http://67-72chevytrucks.com/vboard/s...=122164&page=3 |
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#11 | |
Moderator
![]() Join Date: Oct 2008
Location: Wentworth, NH
Posts: 4,954
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Re: 134a what size orifice
Quote:
If your set up is working I'd stick with it.
__________________
1959 M35A2 LDT465-1D SOLD 1967 Dodge W200 B383, NP420/NP201 SOLD 1969 Dodge Polara 500 B383, A833 SOLD 1972 Ford F250 FE390, NP435/NP205 SOLD 1976 Chevy K20, 6.5L, NV4500/NP208 SOLD 1986 M1008 CUCV SOLD 2000 GMC C2500, TD6.5L, NV4500 2005 Chevy Silverado LS 2500HD 6.0L 4L80E/NP263 2009 Impala SS LS4 V8 RTFM... GM Parts Books, GM Schematics, GM service manuals, and GM training materials...
And please let us know if and how your repairs were successful. |
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#12 | |
*************
![]() Join Date: Apr 2005
Location: Pensacola, FL
Posts: 17,846
|
Re: 134a what size orifice
Quote:
Rob
__________________
Rob - https://www.instagram.com/hart_rod_c10 As Iron Sharpens Iron, So One Man Sharpens Another. Proverbs 27:17 FOR SALE: DBW pedal bracket - http://67-72chevytrucks.com/vboard/s...d.php?t=651123 FOR SALE: Hood Brackets http://67-72chevytrucks.com/vboard/s...d.php?t=679945 1987 Silverado SWB - 34.5K original miles http://67-72chevytrucks.com/vboard/s...d.php?t=801834 1969 SuperBurb - http://67-72chevytrucks.com/vboard/s...d.php?t=200387 1968 Farm truck - http://67-72chevytrucks.com/vboard/s...d.php?t=358692 1968 SWB - http://67-72chevytrucks.com/vboard/s...d.php?t=551258 1948 Chevy - http://67-72chevytrucks.com/vboard/s...=122164&page=3 |
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