Help frozen 502 Magnum in germany!!!
 

Hi from germany,
i have a problem with my Mercruiser 502magnum engine.
The engine got frozen while the boat was on the trailer.
I warmed up the boat and started the engine.It started normaly and runs good but then i saw that the last freeze plug on the side where the oil filter is adapted was dropped out.I installed a new plug and i started again.The engine runs but then milkshaked oil comes out of the oil-dipstick and i stoped the engine at once.
Afterwards i drained the oil and there was about 2Gallons of water in the crankcase.
In about one minute the crankcase got full of water.
I think the block is cracked.The oilcooler is ok.The riseres are ok.
Are there some other area´s where water can enter the crankcase after freezing?Maybe at the intake manifold?
Where are the common area´s for a cracked block?
Can someone give me some help?
Thanks in advance
Rene

They frequently crack in the lifter valley. Pull intake and see what you have. Good luck!

Wow! Sorry to say but I think you need an engine now.:(

yeap, it's done...sorry

Talk to DareDevil.............

I second GO4BROKE. Don't ask me how I know...

If it is leaking into the lifter valley and then draining into the pan you might be able to weld it.

I would drain the water and oil, remove belt from water pump and run a few minutes with fresh oil, maybe repeat a few times to save other parts, maybe over kill others can chim in.

Its junk,,,, get a longblock, or takeout and start over,,,,, sorry

exactly. you simply have to assume that the castings are scrap.

if you simply sit down and do the math... add up every cost associated with testing every casting along with the time and absolute cost of the rebuild when you are done versus the cost of a new long block, i think you would see that the numbers are so close as to not warrent the associated risk. but its your money and your time so its up to you. if it was me, i would shop for take outs.