92 STS Coolant leak coming from motor
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Cadillac Seville / Cadillac Eldorado Forum Discussion, 92 STS Coolant leak coming from motor in Past Cadillac Vehicle Discussion; Looking for some feedback on coolant leak from engine on rear area of motor next to the firewall. I cannot ...
  1. #1
    jeff cowan is offline Cadillac Owners Member
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    Lightbulb 92 STS Coolant leak coming from motor

    Looking for some feedback on coolant leak from engine on rear area of motor next to the firewall. I cannot see leak, it may be a frost plug. How can i get free engine schematics on the net showing frost plug locations? Could it be from something else? it

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  3. #2
    elwesso's Avatar
    elwesso is offline Cadillac Owners Master
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    Re: 92 STS Coolant leak coming from motor

    Hello...... And welcome aboard....... Thanks for signing up

    My guess is its a leaky heater core hose........ The plugs shouldnt leak, unless they were inproperly re-installed, like after a cooling system flush........ Most of the time shops wont mess with the plugs and they hook the car to a machine.......

  4. #3
    Katshot's Avatar
    Katshot is offline Cadillac Owners Master
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    Re: 92 STS Coolant leak coming from motor

    Wes may be right here. Freeze plugs are far less likely than a hose leak. To be honest, anyone who fixes the car will have to rely on good old hunting to find the source of the leak. A pressure tester is the best way to go so you can pressurize the system without it being hot.

  5. #4
    elwesso's Avatar
    elwesso is offline Cadillac Owners Master
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    Re: 92 STS Coolant leak coming from motor

    Lets get some more background on the problem (might as well keep going, im on a roll )

    Has it been doing it for a while, or has it just started...... Any certain conditions it does/doesnt do it.........

  6. #5
    kcnewell is offline Cadillac Owners Connoisseur
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    Re: 92 STS Coolant leak coming from motor

    Quote Originally Posted by Katshot
    Wes may be right here. Freeze plugs are far less likely than a hose leak. To be honest, anyone who fixes the car will have to rely on good old hunting to find the source of the leak. A pressure tester is the best way to go so you can pressurize the system without it being hot.

    This guy wins....The only way to go.

  7. #6
    jeff cowan is offline Cadillac Owners Member
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    Re: 92 STS Coolant leak coming from motor

    Quote Originally Posted by elwesso
    Hello...... And welcome aboard....... Thanks for signing up

    My guess is its a leaky heater core hose........ The plugs shouldnt leak, unless they were inproperly re-installed, like after a cooling system flush........ Most of the time shops wont mess with the plugs and they hook the car to a machine.......
    A mechanic took it to his place of work and could not see the source of the leak, he than suggested pulling the transmission to expose that area of the motor where the leak is coming from.
    Personally, I can't recall an area on any General Motors engine that was not accessible for frost plug (the ones that might rust anyways) and even if one couldn't see it he could at least feel it to change it. Has anyone had these experiences?
    Cheers

  8. #7
    Katshot's Avatar
    Katshot is offline Cadillac Owners Master
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    Re: 92 STS Coolant leak coming from motor

    There ARE freeze plugs on the rear of the engine and the only way to access them is to seperate the engine from the trans, but I'd want to be DAMN sure before taking that step.

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