proper fittingfor the exhaust manifold water supply on a half fwc engine?

[trucknutz36582]

Hi Boat wizards - let me start by saying thanks for the encouragement so far, I feel like I have finally gotten the worst part of this project behind me now -
I am amazed by the depth and breadth of the knowledge on this board!

The latest news in my adventure is I found that I was able to remove the manifolds without taking the engine up on a hoist. i was able to put a low profile socket in there with 1/16 inch to spare. (Yeah, gee thanks, Stingray Engineers!)


so i got a bunch of black powdery gook from the two lower drain plugs and a few chips of impellor out , but only one big chunk...
i wonder if there's more behind this fitting?

how likely is this to break - when I take it off... it feels like plastic...

and why is there a check valve on my exhaust manifold supply line? is it to relieve pressure if there's too much inflow?

 

[trucknutz36582]

ok - it's a drain fitting with a ball valve in it.

what if I replaced it with a 45 degree L fitting? any idea what to look for?

 

[Bt Doctur]

Its part of a 3 or 7 point drain system. Best to remove it completely. Install this type MC-50-806926 - Brass Fitting, 22-806926A1


Also remove the 2 hoses that go to the block drains. You will find them corroded closed also. Remove the quick connect fitting and install brass plugs.
Then go to the connecting tube and remove and cap the 4 openings for the hoses. you could loop both of them also instead of capping them.

 

[Bt Doctur]

Avoid the plastic ones, go with the brass ones google that part number