Engine Size: 5.0L
Refrigerant Type: 134a
Country of Origin: United States
Replaced the original GM R4 compressor , today . It was a " belly leaker " .
It used o-rings to seal the lines to the compressor body .
The new R4 compressor uses sealing washers . I put the gold / brass / thin one on the suction line . Also came with green / thick and red / thinner sealing washers for the high pressure line . I used the green / thick one . Did not use either the thick or thin insert ? Could not figure them out ?
Also replaced the accumulator dryer . It only came with one new o-ring . Had to re-use one of the old o-rings . :-(
Vacuumed the system down & I have a leak . :-(
Used Nylog Blue on all o-rings and sealing washers .
Tomorrow I will try to get some new o-rings for the accumulator . Did I mess up on the sealing washers ? Should I have used one of the inserts on the high side sealing washer ?
I have not put any refrigerant , into the system , yet . I used oil with UV die . May have to pressure up the system , enough to bring the compressor on . And use the UV lite to try to trace down the leak or leaks ?
What would be the chance the vacuum leak could be the new compressor shaft seal ? That it has not " seated " to the shaft , yet ?
Edited: Sun April 20, 2014 at 9:29 AM by WyrTwister
I've never used the inserts- the goal is to have the manifold mount flat and square to compressor- I use the red sealing washer on the deep port and a standard (thin) on the raised port.
The number one A/C diagnostic tool there is- is to know how much refrigerant is in the system- this can only be done by recovering and weighing the refrigerant!!
Just a thought.... 65% of A/C failures in my 3200 car diagnostic database (GM vehicles) are due to loss of refrigerant due to a leak......
I used the thin / yellow / brass sealing washer ( with the larger hole in the middle ) on the suction port . The green / thick one with the smaller hole in the middle on the high pressure port . Looks like the flange ( that the 2 lines are attached to ) is setting evenly spaced against the flat on the compressor ?
Should I use the red sealing washer ? On the high side port ?
The thin one / yellow on the suction port ?
Thanks , :-)
Edited: Sun April 20, 2014 at 12:55 PM by WyrTwister
http://www.autoacforum.com/forumimages/Sealing washers GM 440-850.jpg
Swapped sealing washers , several times . And used the inserts . No improvement .
Changed o-rings at tde accumulator . No luck .
Put some gas in it and let it run a little while . Tomorrow I hope to start looking for traces of UV dye .
Edited: Sun April 20, 2014 at 3:02 PM by WyrTwister
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