Yes water in my oil!

[alex3012red]

93 merc. 3.0 done a head job, new valves,gasket, put it in the water ran fine next day had a little water on #4 cyl., enough to have a bad idle,and to start making my oil milky on top end.my question is the water coming from the riser did not replace that or manifold, how can i check them for leaks, i will do the block pressure test any suggestion on how to do are welcome, i did read Don S. water in oil (thanks Don for your great help to all). just wanted to get more details on how to. I don't winterize the boat,(california) but it is in saltwater most of the time. 99%
I done the head job beacause it had injested water!
also changed water pump and thermostat and housing.

 

[havasuboatman]

Re: Yes water in my oil!

When you had the water problem before did you figure out how it got in then, or did you just to a valve job on a possibly cracked head?

 

[ENSIGN]

Re: Yes water in my oil!

Do you have any signs of leakage at the rise/manifold connection like rust stains? If so take it apart and look for thinned out water passages where the gasket sets.Alocal machine shop does our pressure/vacuum testing on the manifolds.Idon't know of a 100% test for the riser

 

[alex3012red]

Re: Yes water in my oil!

since it was missing the water shutter at the exhaust, I went that route. I will take the riser off today to see any sings of water thru there. If I find any sings of water should i just replace the gasket or take the manifold out and have it checked?