PLEASE HELP!!! lots of steam/smoke coming out of exhaust and water in oil

[Fourwinnsgang]

I have a 1988 4.3 omc and it was smoking/steaming a lot out of the exhaust. I pulled the port side head off because it had low compression on one cylinder. after pulling it this is what I see. any ideas of what my issue is/ how to go about repairing it?
picture
https://ibb.co/C6mdFMw

https://ibb.co/C6mdFMw.jpg

 

[Fourwinnsgang]

also, when run my finger over it its not deep I can only feel the texture difference

 

[alldodge]

Something broke and a piece of it was caught by the piston, might be part of a ring. Might be an illusion but does the gap between piston and cylinder look a bit larger below the damage?

 

[Fourwinnsgang]

Something broke and a piece of it was caught by the piston, might be part of a ring. Might be an illusion but does the gap between piston and cylinder look a bit larger below the damage?

it does not

 

[Fourwinnsgang]

when pulling it the bottom of the exhaust manifold was cracked. could this cause this problem

 

[alldodge]

No, only if it was cracked inside. A crack on the bottom would just put water in the boat

Look close at the gaskets and see if any where leaking. Also look at plugs, any that are more of a white color they have been steam cleaned

 

[Fourwinnsgang]

No, only if it was cracked inside. A crack on the bottom would just put water in the boat

Look close at the gaskets and see if any where leaking. Also look at plugs, any that are more of a white color they have been steam cleaned

okay thanks!! the piston in the picture and the one next to it were white

 

[Fourwinnsgang]

I checked the block for cracks and couldn't find any above the waterline in the block. another question. I believe it was a little overfilled with oil when it started. is it possible a gasket is leaking but not in an obvious to see way?

 

[alldodge]

is it possible a gasket is leaking but not in an obvious to see way? (where)

Sure, oil can leak from many places

 

[Fourwinnsgang]

Sure, oil can leak from many places

particularly the head gasket and intake gasket.

 

[Fourwinnsgang]

im hoping high oil pressure caused a gasket to break its seal and allow water into the block

 

[alldodge]

A leaking head gasket will put water in the oil. Water gets into cylinders and then leaks down past rings

Can also do it from intake gasket easy enough

 

[Fourwinnsgang]

A leaking head gasket will put water in the oil. Water gets into cylinders and then leaks down past rings

Can also do it from intake gasket easy enough

okay, thanks for the info!!

 

[Lou C]

Just that visible damage suggests that the engine needs to come out and get bored and rebuilt

 

[Fourwinnsgang]

Just that visible damage suggests that the engine needs to come out and get bored and rebuilt

the visiable damage is just as smooth as the cylinder. there is not indentation in it. does this change anything? I am planning on sealing it back up with new gaskets and running engine restorer in the oil.

 

[Scott Danforth]

that looks like a crack in the bore.... time to do a die penetrate test.