1987 OMC I/O 175. Blew a freeze plug

[Ntxgb]

What potential damage am I looking at having blown a freeze plug, there is water in the oil

 

[Bondo]

Ayuh,.... Welcome Aboard,..... Unfortunately, a frozen busted cracked block is the most likely diagnosis,.....

A replacement long block crate motor, new or reman is the quickest, 'n many times the cheapest way back out onto the water,....

 

[Ntxgb]

Thanks for the response..Is a cracked block imminent?

 

[Skutt]

There can be many reasons for water in the oil rather than just a cracked block. A blown soft plug will spill water outside but not into the oil. I think you might have something else going on, hopefully a less troublesome repair.

 

[HT32BSX115]

What potential damage am I looking at having blown a freeze plug, there is water in the oil

No such thing as a "Freeze Plug"

They're actually called "CORE Plugs". Placed in holes left in the block casting as a result of the casting process.

They also seem to occasionally 'pop' out when water left in the block freezes.........

The block frequently cracks too.....and unfortunately, since the Core-plugs seem to pop out when the block cracks due to freezing, it might be more accurate to call them "Freeze-damage detection plugs".....

Your next step will be install new Core-Plugs so as to pressure check your block.

If the block will hold 15 PSI or so, you lucked out. Since you already have water in your oil, that will be somewhat unlikely. If this is the case, you'll need to find another engine.

Sorry about that............


Rick

 

[jerryjerry05]

The water could be from: the carb being uncovered, the manifolds cracked and leaking back into the block, or the heads or block is cracked.