Dave, The only tool you need is a pump (to remove water from cylinders).
I would not sweat much about it. You said that you tried cranking the engine. If it is hydro locked, the starter motor would not be able to move it. The general effect would sound more or less like when your battery is dead. The only negative is that you plan to keep the water in the engine for a few days. The remedy is simple. - Remove glow plugs (it is substantially easier than removing the injectors) - Pump out water from cylinders (try removing as much as you can) - Crank the engine by hand a few turns, this would spit the remaining water out. Beware that the water will be dirty, so protect the surroundings. - Crank the engine using the starter motor (with fuel shutoff on, I.e. don’t let the engine start). Now the water will be really spraying around. - Change the oil and filter - Start the engine normally - Change the oil and filter - Check the oil. If there are any grey bubbles of water, keep changing the oil and filter until they are gone. - Pat yourself on the back for saving the engine When you change the oil and filter, use the cheapest filter you can get; it won’t get any work out. I don’t believe that you caused any permanent damage. Guess how I know. My engine is humming quite well two years after being hydro locked. Mine is a Perkins, but it doesn’t matter. Good luck Marek C270 “Legato “ Ottawa ON Sent from Mail for Windows 10 From: David Pulaski via CnC-List Sent: October 21, 2015 16:02 To: cnc-list@cnc-list.com Cc: David Pulaski Subject: Stus-List Hydrolocked! Well this is a crappy way to end the season. Short story is, I'm 99% positive that I managed to get water in the cylinders in my Yanmar 3GM30F, and now have a hydrolock. Thankfully, the engine was not running when it happened, but I *did* attempt to crank the motor with the starter a couple of times before I realized what had happened. So now, I'm worried about significant damage from two angles: 1) Bent rods/crank/pistons? I'm inclined to think that the starter motor doesn't have nearly as much torque as the engine operating under normal load, so I'm hoping that my attempts to crank didn't permanently do any damage such as this. Thoughts? 2) Time: Unfortunately I can't get back there with tools and equipment to attempt to rectify the hydrolock until Sunday, which means the engine will have been sitting there with water in the cylinders for almost 4 days. It's mostly fresh / brackish water (boat's on a mooring in a river mouth). Chances of corrosion in the cylinders requiring a teardown? Anyone have any experiences with hydrolocks they'd care to share? Ugh...
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