Water in engine! From where?

[Divecaptchris]

Ok so here is my delima, I bought this boat with the port motor blown, so I ordered a longblock,and new manifolds and risers. Upon disassembly of the old motor i find LOTS of rust in both ex manifolds, head intake and exhaust ports, and the intake manifold fuel sections, no rust in water sections (BTW it is closed cooling). about 8 of the pushrods are snapped in 1 or more pieces. So I begin to think what caused this? Am I sure i have replaced everything that could have caused this? so i figure it could have been a cracked block, head, or ex manifold, and that is about all i can think of! Does anyone have anything i have not thought of that could have caused this? The only engine part not replaced that has any contact with collant or raw water is the intake manifold!

 

[Don S]

Re: Water in engine! From where?

Here is a Merc service bulletin that explains water intrusion.

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

 

[HT32BSX115]

Re: Water in engine! From where?

So I begin to think what caused this? Am I sure i have replaced everything that could have caused this?

Howdy,

Well, by your description, it was probably riser leaks from leaking gaskets/cracks etc that allowed water into the exhaust area that caused the rust, stuck valves and bent/broken pushrods.....

 

[Bondo]

Re: Water in engine! From where?

Howdy,

Well, by your description, it was probably riser leaks from leaking gaskets/cracks etc that allowed water into the exhaust area that caused the rust, stuck valves and bent/broken pushrods.....

Ayuh,... And/ or massive amounts of rain water, down the carb....??