Re: V4 cooling schematic?

[Don]

I’ll look and see if I have the OEM service manual for this engine, which is the best place to see an accurate cooling system diagram.
Later models had the telltale tapped into the outer exhaust cover. But, your cover does not have the boss in place to drill and tap for the elbow. I hesitate to advise trying to drill and tap into your existing cover, I fear you may drill through the inner exhaust cover as well.
Have you replaced the water pump on this engine lately, or is it new to you? Is it a fresh or salt water engine?