99 Suburban 5.7L with dual a/c
Valve stem in high side leaking 134a, oil, and system not cooling anymore
Valve stem appears to be leaning over.
Solution I hope for is to buy a valve stem puller that will seal the system. Then all I need to do is add some R134a.
Problem:
I see there are valve stem pullers for different types of cores. There is a GM high flow valve remover. Does this apply to my Suburban? Does it have high flow or "large core" valves.
Or, do all R134a systems have the same size valve core? 16MM?
Thanks
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We will never surrender....at least until they throw us out of the bar
I believe on that vehicle the high side service port is replaced. The complete service port unscrews itself as the Schrader valve is not replaceable.
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As Tim stated, you have to change the whole fitting. Use AcDelco part number 15-5438 as shown below..Hope this helps..
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Chick
Email: Chick
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Freedoms just another word for nothing left to lose
was not logged in .......
got this fitting installed, evacuated system, added 23oz R134a so far. Pressure readings were 42/230 (ls,hs). Manual I have says 33/233 but I realized just now this is for Tahoe - single evaporator system. Mine is dual evap. Anyone have a way to look up the pressures on a 1999 5.7L 2WD Chevy Suburban with dual a/c?
THanks
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We will never surrender....at least until they throw us out of the bar
Edited: Mon August 23, 2004 at 10:09 PM by ketch
Refrigerant capacity dual unit: 64 ounces.
Low Side Reading: 34 PSI
High Side Reading: 228 PSI
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I'd have the refrigerant recovered, measured, and correct amount added, I wonder if you're low on refrigerant as well as having the air flow issue. Suburbans cool well here in Arizona when all is operating correctly. Mine's a 1994 dual air.
Its possible, this thing had a slow leak but i replaced the high side port (the thing pictured above) and the low side valve core. I was pretty sure that would cure my problem, but maybe not. The way I understand it, the HT6 compressor itself is pron to leakage. Its been good for a month or so tho so who knows. What can I expect a shop to charge me to recover and weigh the refrigerant? I'll have to work that into my budget, money is tight for me, as well as so many others, right now.
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1996 Chevy Suburban 2500 4x2 6.5L Turbo
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