Had water in cylinders.. just want to be sure!

[2boats@hm]

Correct me If Im wrong, I just want to be sure. When you get water in cylinders the cause can be 1.bad/cracked intake. 2.bad exhaust/risers 3. water comming back into the exhaust. To CMA Im planning to replace the intake and exhaust manifolds elbows and risers. Long story..
Thanks

 

[TilliamWe]

Re: Had water in cylinders.. just want to be sure!

Change your #1 to Number 5 or 6. Exhaust is the first through about the 4th or 5th reason for water in the cylinders of a marine engine.

Maybe this will help?

http://www.boatfix.com/merc/Bullet/01/01_13.pdf

 

[Bondo]

Re: Had water in cylinders.. just want to be sure!

Long story..

Ayuh,..........

Atleast tell Us what Motor,+ Drive.......

 

[2boats@hm]

Re: Had water in cylinders.. just want to be sure!

My fault..I have a 1976 wellcraft nova 250 offshore with twin GM 5.7s I thought the water problem might be because the exhaust are close to the water line. That theory fell apart when I started the boat in the driveway with the water hose on the outdrives and manged to get water in the oil.Only in one motor... Thanks again

 

[Bondo]

Re: Had water in cylinders.. just want to be sure!

I have a 1976 wellcraft nova 250 offshore with twin GM 5.7s

Ayuh,..........

Atleast tell Us what Motor,+ Drive.......

Ayuh,..... You've got twin 350s,...... From WHO,..... WHAT Drives,..??..??

By the Sounds of things,.... You've got a Cracked Block........

 

[2boats@hm]

Re: Had water in cylinders.. just want to be sure!

The Motors are Mercs Chevy blocks,with the alpha outdrives. As far as the blocks being cracked. They have less than 4hours on them...

 

[Bondo]

Re: Had water in cylinders.. just want to be sure!

As far as the blocks being cracked. They have less than 4hours on them...

Ayuh,......

And it Only takes a couple of hours at Freezing Temps to Crack'em........

Drain the Block,........
Block off the cooling system of the Block,+ Pressurize it with Air,.. 15/20psi is enough,.....

You'll Hear where it's Leaking.........

 

[2boats@hm]

Re: Had water in cylinders.. just want to be sure!

who said anything about freezing? The motors were installed last july! all this happened over the summer I am trying to avoid a repeat from last year,the motor was redone. Thanks

 

[bomar76]

Re: Had water in cylinders.. just want to be sure!

who said anything about freezing?

Since you are doling out pertinant information like it's the secret of the universe, guesses have to be made.....

 

[TilliamWe]

Re: Had water in cylinders.. just want to be sure!

...That theory fell apart when I started the boat in the driveway with the water hose on the outdrives and manged to get water in the oil.

I am no expert, but water in the oil is not exactly the same as water in the cylinders. With a fresh motor, water in a cylinder shouldn't be leaking past the rings into the oil, should it?

So which do you have water in the cylinders, water in the oil, or both?

 

[bomar76]

Re: Had water in cylinders.. just want to be sure!

who said anything about freezing? The motors were installed last july! all this happened over the summer I am trying to avoid a repeat from last year,the motor was redone. Thanks

...and now you are editing posts ......glad I quoted your original.

 

[Coors]

Re: Had water in cylinders.. just want to be sure!

...and now you are editing posts ......glad I quoted your original.

Good, bomar, I was getting lost, didn't see editing.

 

[Bondo]

Re: Had water in cylinders.. just want to be sure!

who said anything about freezing? The motors were installed last july! all this happened over the summer I am trying to avoid a repeat from last year,the motor was redone. Thanks

Ayuh,......

You haven't filled in the header at the top of your posts, So We have No Clue as to Where you call Home,...
And,....
We've gone thru a Winter since Last July........

If you don't supply the Info,.....
We have to make Guesses.......

That theory fell apart when I started the boat in the driveway with the water hose on the outdrives and manged to get water in the oil.

Does this motor have an Oil Cooler,.........