Engine Size: 6.8
Refrigerant Type: 134
Ambient Temp: 110
Country of Origin: United States
Just put on new comp, condenser o tube and dryer. Hooked everything up and pulled a vacuum and there is a leak somewhere. It will loose all the vacuum in about ten minutes. I don't have a leak detector. I know it has to be one of the fittings I opened up but which one? Some of the orings in the kit I bought were not a perfect match I used the ones that were closest. All the new parts came from ackits. Any suggestions?
Spray your connections with some soap and water or Big Blu and add a little refrigerant.
First check that your manifold holds vacuum when not attached to the truck.
With the engine off, test under pressure by putting in R-134a up to about 50 psi (unless you hear it hissing out before then) and check with soapy water. You can also use clean, dry air or nitrogen for this test but you will need to adapt the yellow hose to your source of gas. If you use a gas other than refrigerant, keep the pressure below 200 psi, 150 is safer.
Okay that helped is coming from the dryer connection. I did not buy the Nylog (Blue) Gasket Thread Sealant from ACKITS can I use thread tape?
The o-ring makes the seal. Try a different one, you may need to source a different size locally. The threads don't need any sealant, but they should have something on them to lubricate and prevent seizing up for the next time.
As stated proper o-ring and a assembly lube, we prefer Nylog.
Okay now when I pull the hose off the low side schrader valve it leaks. Is the cap a good enough seal? If I pull a vacuum only on the high side it doesn't lose vacuum when I turn the pump off.
Don't count on the shrader valves to hold vacuum, if that's what you're asking. They're built to resist internal pressure. Slight leakage will be stopped by putting the cap on, make sure the gasket in the cap is good.
Okay It will now hold a vacuum. I am hoping I plumbed the condenser right. The hose from pump to the top port of the condenser?
Put in freon the temps got down to 55 and saw something leaking under the truck. The hose let go. lost all the freon and an ounce or two of oil. Off to get a new hose.Thanks
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