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Location:  Main Index » Forum Index » Trucks-Vans-SUV » 1973-1987 Fullsize Trucks, Vans, 1973-1991 Blazers, Suburbans » Vacuum for AC/heat controls? » Post#2230058
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Username Post: Vacuum for AC/heat controls?
kangaroo 
Member
Posts: 175

Reg: 11-04-06
 05-26-12 12:56 PM - Post#2230058    

84 c-10
I have hooked a vacuum tester to the system from the engine compartment and do not get a solid reading. I can pump the system to 15 hg but it slowly goes down to about 3-4 pounds. Is this normal? I am thinking that it should hold vacuum and not slowly "leak"? I checked my 89 with the same system and it does pretty much the same.
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Location:  Main Index » Forum Index » Trucks-Vans-SUV » 1973-1987 Fullsize Trucks, Vans, 1973-1991 Blazers, Suburbans » Vacuum for AC/heat controls? » Post#2230058
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