3.0 REMOVING BLUE DRAIN HOSES & Plugging the block and manifold - Help Needed...

[12345john]

I am in the process of (winterizing) draining water from the engine block and manifold in a 2003 Bayliner 175 with the 3.0 i/o.
I am intending on removing the BLUE hoses and plastic fittings from the block and manifold and replacing them with brass NPT plugs.

I removed Blue Hose #1 from the block and can plug the block with a brass NPT plug.

However, the current plastic manifold "T" drain has 2 hoses going to it. Blue Hose #2 is a drain going to the T-Handle, and Black Hose #3 routes up to the top of the manifold and "T's" into a 1" hose that connects to the lower part of the thermastat housing.

QUESTION: Do I just plug off the Black Hose #3 "T'd" off from the hose comming from the thermastat housing or do
I get a barbed NPT fitting for the bottom of the manifold and reconnect Black Hose #3 to it?

 

[Don S]

Re: 3.0 REMOVING BLUE DRAIN HOSES & Plugging the block and manifold - Help Needed...

Re: 3.0 REMOVING BLUE DRAIN HOSES & Plugging the block and manifold - Help Needed...

Follow that little black hose, it goes up to the hose that supplies water to the engine from the transom shield. That main hose also has the power steering cooler if you have PS. It needs to be drained too. You will have to just look at it and determine the best way to drain the main hose and cooler.
The Tee fitting can then be removed from the manifold and a brass pipe plug installed.

 

[12345john]

Re: 3.0 REMOVING BLUE DRAIN HOSES & Plugging the block and manifold - Help Needed...

Re: 3.0 REMOVING BLUE DRAIN HOSES & Plugging the block and manifold - Help Needed...

Don, thanks for your help I appreciate it! I do not have the power steering pump or the cooler.
However, the hose that supplies the water from the transom shield to the thermastat housing has a "T" in it ALSO.
Then from the "T" that is in the hose, from the transom shield, this is the source from where the small black hose goes to the bottom of the manifold.

QUESTION:

What do I do about the "T" and small black hose from comming out of the large hose from the transom shield, do I just plug it with a bolt and a hose clamp? I understand to plug the hole in the bottom of the manifold?


QUESTION

What purpose does that small black hose serve that goes to the bottom of the manifold?

Thanks!
John

 

[12345john]

Re: 3.0 REMOVING BLUE DRAIN HOSES & Plugging the block and manifold - Help Needed...

Re: 3.0 REMOVING BLUE DRAIN HOSES & Plugging the block and manifold - Help Needed...

Can anybody answer the last two questions posted, please?