Question about 1995 Cadillac DeVille

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My 1995 Cadillac DeVille 4.9 is hydro locked. How can this happen? Does it need a new motor?

It ran fine before shutting off for a day, Replaced the starter but then it did the same thing. Click and nothing. Checked starter voltage and it's fine. Shop tells me it is "hydro-locked" or "locked up". Do I need a new engine?

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  • wildwoodts
    wildwoodts Nov 27, 2012

    Sorry, my question should have included the shop didn't take out any plugs to diagnose problem. I know how hydro-lock happens, but I wanted to know of any other way an engine can "lock" while turned off. Locked up torque converter? Broken parking pall? Thanks anyway.

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I believe hydro locked means u have a cylinder full of fluid which means that u most likely have a bad head gasket so yes if they were telling u the truth u will need a new motor
hope this helps

Posted on Nov 27, 2012

  • wildwoodts
    wildwoodts Nov 29, 2012

    We decided to replace the motor without removing plugs. This was because the engine would not move either direction. It would move in the reverse direction unless major damage to heads filled multiple cylinders with cooling fluid, which would cost as much as a rebuilt engine.

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SOURCE: 2001 cadillac Deville won't start-------

Your security system inside your steering wheel is probably gone bad and needs to be replaced.This is a dealer job or a very experienced auto elactric shop.

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SOURCE: Cadillac Deville 2000- Engine check light code P0741

If you like go ahead and let someone sell and replace your transmission but here is my suggestion! Check around and see if you can find a minor vacuum leak! This can simply be the big round hose that goes from the fuel injection to the power brake hub! This is normally a push in connector which has about a 1/2 inch hose clamped on it! If there is any kink or the connector is not in correctly a leak will occur and the transmission will shift rough as though you will be thrown out of the vehicle! Try unplugging this connector and plug it back in hard and straight and maybe you will be lucky and fix your problem. If the vacuum is correct your transmission will shift better than you have ever experienced!

Posted on Aug 16, 2009

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