Two simple questions about a LT1 Road Master
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5.0 and 5.7 Discussion, Two simple questions about a LT1 Road Master in Cadillac Engine Technical Discussion; Ok my cousins A/c compressor runs for 1 second and turns off after about 8 seconds it turns on and ...
  1. #1
    RocketFast321's Avatar
    RocketFast321 is offline Cadillac Owners Fanatic
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    Two simple questions about a LT1 Road Master

    Ok my cousins A/c compressor runs for 1 second and turns off after about 8 seconds it turns on and does the 1 second turn. I'm guessing its low, and has a leak somewhere, but now we are trying to get pass summer. But where do I add the 134a? Do i use the port on the accumulator?

    Also I took a quick look at the motor, but i don't remember seeing a radiator cap. So I'm guessing its like my grand am, and i have to fill the radiator via the overflow tank.

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  3. #2
    z06bigbird is offline Cadillac Owners Connoisseur
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    Re: Two simple questions about a LT1 Road Master

    To service the a/c right, get someone to help you.

    1. evacuate system for 45 min.
    2. replace little plastic valve in dryer. No coffee yet, and I am blocking on the right name.
    3. use gauges and do it right.

    Here is how to make a suction machine to evac system:

    1. 18 X 18 piece of 1/2 inch plywood.
    2. mount old washing machine motor. Free at real appliance store.
    3. bolt down an old working a/c compressor.
    4. connect with fan belt.
    5. run compressor backwards, & it creates suction.
    6. you will need to buy a set of hoses for this.
    7. cheap set up.

  4. #3
    N0DIH's Avatar
    N0DIH is offline Cadillac Owners Master
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    Re: Two simple questions about a LT1 Road Master

    I have an old dehiumidifier that is on its last legs that the compressor still runs good that I might sacrifice into a vacuum pump, I have heard old window air-conditioners do a great job....

    Now I am mad I tossed that old A6 compressor that was good last year, could have make it suck to no end!

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