1997 4.3GL PLKD siezed?

[Davis J]

I took the boat out to let a buyer test drive. Before he drove it, everything was checked and normal. After the test drive was over, i decided to take it on a final spin around the lake when it suddenly died in the middle. I checked the battery and kill switch, both were good and it was not overheating. I was turning at the time it died. I was told it may be hydra locked. When i got home i did the following:
Checked the battery voltage-normal
Removed and tested the starter-works fine
Re-installed the starter, removed my plugs and tried to turn it over-will not turn over, moves about 1/4 inch when turning the key
Looked at the dipstick and realized there is probably triple the amount of water vs oil and what looks like vanilla pudding under the valve covers.
Block is not cracked, as far as i can tell anyway.

How could water have gotten in the engine and what may be the issue? Bearings? Pistons? your help will be greatly appreciated!

 

[bruceb58]

Block is cracked if you have that much water in the crankcase.

Did you winterize the engine? If so how did you do it?

 

[Davis J]

i winterized using the volvo penta workshop manual for LK models draining the block on each side and exhaust manifolds, all water hoses and running antifreeze through it.. I live in south Texas where winter weather reflects high twenties for around a week per year. Also, the boat is stored in my garage where it does not get below freezing.

 

[bruceb58]

And how did you run antifreeze through it?

Whatever you did, something went very wrong. When you opened the drains, did you poke a wire in the hole to dislodge any rust or debris in the hole?

Next step is to do a pressure test of your cooling system.

Do you run your boat in salt water?

 

[Davis J]

First, everything was closed and connected to the origional state. i have a large plastic container i fill with antifreeze and connect a water hose to the ear muffs which then cover the water inlet ports of the stern. then start the engine, smash on the container, and it runs through

 

[bruceb58]

You do realize that none of that antifreeze entered your engine right? Once that cold antifreeze hit your thermostat, it went right out your exhaust manifolds. More blocks have been cracked using that method than any other.

I can also guarantee, that is not shown in the LK manual.

 

[Davis J]

No sir it is not and that makes perfect sense. I did not think about that....so i would bet money my block is cracked!!!

 

[bruceb58]

Well...unless you intake manifold rusted out and let water in. That is why I asked you if you boat in salt water or not.

Let's say your intake manifold did rust out and let water in. You still have the issue that your engine may have seized due to lack of lubrication. Sounds like new engine no matter what happened.

 

[Davis J]

I missed that part. No salt, just fresh and i took a piece of a wire hanger to poke the drain. There was a little rust debris.

Ten 4, thanks for the help!!

 

[bruceb58]

If the engine wasn't seized, I would say investigate more. Crazier things have happened. Drives that go bad will also make it look like your engine is seized as well.

I would probably pressure test the block just for fun anyway.

 

[Davis J]

Ok, willl do. Thank you for the advice!! Very helpful!

 

[Davis J]

Well, you were correct! Need a new engine, the block is cracked on the inside.

 

[bruceb58]

Bummer. You pressure tested it?