Question about 1999 Buick LeSabre

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AFTER CHANGING A THERMASTAST , I EXPERIENCED HYDRO-LOCK OF THE ENGINE WHAT IS HYDRO-LOCK MEAN ???

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How do you know the engine hydrolocked? Did your mechanic tell you?
Hydrolocking occurs when the engine gets filled with a liquid such as oil or water, and because it's not compressible the way air is, it jams up the engine and prevents it from turning. It might bend parts and cause damage if you're not lucky. Generally the spark plugs should be removed and the engine turned to expel the liquid and allow it to turn again. Then you'll have to determine the extent of the damage.
If you changed the thermostat yourself, and in the process, stuck a garden hose down the air intake instead of filling the radiator, you could have filled it with enough water to hydrolock it. Otherwise, it's pretty unusual that a thermostat replacement could cause hydrolocking.

Posted on Dec 31, 2010

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Posted on Jan 02, 2017

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1 Answer

What is liquid locked in the cylinder.


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Car just stopped...no check engine light, no oil light, no warning at all it just stopped. i heard a squealing noise, but i didnt hear any lifter tapping or piston slap or any type of knocking, its buggin...


If the motor is hydro locked then it has a coolant leak in the cylinder head or intake. The gm 3.1 and 3.4 are very well known for issue. If the batt is fully charged and the engine will not turn over that probably what it is. It can be a very costly repair so first check the oil if it looks like a milk shake or has white streaks in the oil then sorry but motor done and not worth fixing it.

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I was changing my pressure line on my power steering pump. the line wouldnt break loose but the nut behind it did. i removed it and a valve and spring popped out. i put them back in and replaced the line....


small end of valve goes in first then spring might also be hydro lock jack front wheels off ground Carefull level surface wheels blocked car supported then fill pump with fluid turn wheels left & right to full stops couple of time with eng off to purge air ck fluid again then see if pump works

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How does the hydro boost fell "funny" - does the brake pedal go to the floor? Do the brakes lock up? engage immediatly? Does the brake light stay on, come on while brakes are applied? Have a diagnostics test done on it at a local auto parts store (usually a free service; stores may vary) and see if any codes show up. If so, the person submitting the test can tell you what the code(s) mean, and what to do to fix the problem.

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