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Thread: AC 98 Suburban

  1. #1

    Default AC 98 Suburban

    Hey Guys and Girls, been awhile since Ive been on. Good to read new posts, Ive missed it. I have two questions maybe someone can help me. First Im putting freon in my 98 burb (3lbs 8oz), how much synthetic oil do I had with that? Second My rear air is a whole lot cooler than the front, can the be a reason for this. Ive cleaned the ac coil coming off the blower have alot better airflow but still not as cold as rear air. Thanks. Hopefully get pics of her up soon she"s a beast. Later ya"ll

  2. #2
    Sr. Mechanic Ethan's Avatar
    Join Date
    Sep 2009
    Cedar Park, TX


    I would first recommend you find the leak, instead of just putting freon in there and leaving it be, if you have to put some in, then it's leaking. I'm more inclined to believe that the metering device(weather it be orifice tube style or expansion valve style, not sure on dual air burbs) is bad for the front evaporator, which then putting more freon in would just make the rear cool worse, and the front not cool at all. Typically, on dual air, when it's low, the front will cool better, and the rear wont cool at all.
    1994 Chevy Silverado 1500 Ext Cab 350 cuin TBI in dark Chevy blue
    160,000+ miles
    Original paint
    Original interior
    Original engine and tranny
    wrecked twice stolen once
    Diamond Plate bed rails
    Power windows
    Original Alloy wheels
    Original fancy smancy cup holder
    Tow package
    Original plastic bed liner
    K&N Cone Air Intake
    Dual MagnaFlow exhaust(not true dual) with chrome tips
    MSD Street Fire Performance Ignition coil

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