hydrolocked engine?? - Pirate4x4.Com : 4x4 and Off-Road Forum
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Old 08-23-2003, 05:41 PM   #1 (permalink)
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hydrolocked engine??

what are the symptoms for a hydrolocked engine.... knocking...will not crank over???
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Old 08-23-2003, 06:57 PM   #2 (permalink)
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Hydrolocking occurs when the cylendar is in the down position and fills with a fluid, hydro refers to water, and your piston trys to compress water which is virtually impossible. This will almost always seize the motor and it will not be able to turn over. In the extreme cases it will cause the rod to snap and then you have a real mess. If it a simple hydolock you can remove your plugs to get it to turn over again as long as nothing was bent, or tweeked, which usually won't happen!
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Old 08-23-2003, 09:04 PM   #3 (permalink)
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I had hydro-locked my ranger (a while back) and didn't know what was going on at first. I just went thru a large water hole and my engine died. When I tried to restart I would just here the solenoid click. I was thinking "hmmm.... large water hole.... starter is probably wet.... water might have shorted the electronics somehow... " anyway I was foolish and had never considered waterlock, so since my truck was a stick I had my buddy hitch up with a towstrap and and drag me for a pushstart. I droped the clutch several times and everytime the rear wheels would just lock up and drag. We were on gravel, and while I though that should have had enough traction to turn over my little 4-banger, I thought "well maybe not... lets try pavement, theres a main road just around the bend." So we go there and then on the pavement I drop the clutch and again the wheels just locked up and dragged. Now I start getting worried. I know at this point my problem are not electrical. So finally we decide to pull the plugs and see what is going on. We discovered that ALL of the cyclinders were full of mud/water. SO... we pulled all four front plugs (yep this 99' Ford Ranger had two plugs per cylinder) and gave the key a twist. It pumped out a LOT of water and then after about 15 secs of cranking it started shooting fire out the plug holes (the other plug was igniting). we took this as a great sign and I thought I was one lucky SOB. I couldn't believe I had not done any damage to the drivetrain or motor after repeatedly aplying HUGE shock loads when dropping the clutch while being pulled by my buddies truck. My buddy was in even more in awe then me (probably because he was a Chevy guy). Anyway I was really lucky, but at the same time foolish, becuase I drove it home without changing the oil first. After about 40 miles the motor started knocking because the mud in the oil (forced through the rings I presume) ate out the bearings in the lower end.

Moral of the story is, if your water locked, drain cylinders, and CHANGE OIL.

(OH, and I wouldn't recommend trying to force it to turn over by brute force either )

Last edited by OverThrottle; 08-23-2003 at 09:07 PM.
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Old 08-23-2003, 09:37 PM   #4 (permalink)
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A buddy of mine hydrolocked his 99 Z71 3 times. All three times he pulled the plugs and cranked it over and watched about 5 gallons of water come from the plug holes and tail pipes. Put the plugs back in it, and it fired right up. Let it run for a few minutes and it ran good again. Since then, all the idiot lights on his dash stay lit all the time (due to water/mud/who knows what else getting in his computer/power distrabution box). He can't get them to go out no matter what he does. Truck still runs and drives, just constant illuminated idiot lights. Sorry for rambling...

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Old 08-24-2003, 06:52 PM   #5 (permalink)
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The symptom is this if it won't start (click, click) and feels like starter engaged the flywheel with a clunk, you may be hydrolocked (or siezed). If you sucked in water while running and it still runs but has a banging noise this would be a bad thing. You have probably bent a connecting rod, and are no longer hydrolocked.
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Old 08-24-2003, 11:55 PM   #6 (permalink)
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He can't get them to go out no matter what he does, just constant illuminated idiot lights.
ROFLOL. Almost sounds like a personality trait.

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Old 08-26-2003, 06:38 PM   #7 (permalink)
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when i lived in houston, these dumbass BMW owners would come into my shop after "going into a few inches of water" when it rained (remember it rains 3 inches down there SOMEWHERE its flooding in houston. you stand on chair and see the whole city...lol) for some reason the 6 cyl engines would bend the rods, and the 8 and 12 cyls would snap the rods, then fling around and punch holes in the block....sigh...if they only knew to not try to drive thru water with a car....
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Old 08-26-2003, 08:24 PM   #8 (permalink)
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We were up in washington with a 93 jeep that had the 4.0 in it. Went throught a water hole and stalled. Went to start it up and it made the most horible nosie you would want to here 12 hours from home. Never the less the number one conecting rod made an exit on the driver side and around the oil pan. Some times you just arnt that lucky that the enigne wont kick over. And who the hell desited to put the air intake at the botom of the grill? I was wondering if a paper elimet could have helped keep it from . It was running a K&N and ovecorse the dont exsorb water.
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