Pet Cock Valves For Engine Block

Good morning. Wondered if any of you fine folks might provide a source for pet cock valves. I would like to replace the water drain plug on the engine block of my SN 196 with a pet cock valve for easy draining after those winter sets. Thanks for your help.

Beware they tend to clog with scale anyway.

I used some small 1/4 turn ball valves. Similar to McMaster #47865K41.

I hook up a barbed hose fitting and a piece of hose to drain the block into the bilge area. I can also drain the anti-freeze back into bottles for proper disposal in the spring.

If my memory is correct, the last one I did on my 77 PCM needed 4 - 1/4" (2 for the block and 2 for the manifolds) and a 5th 1/8" for the J pipe on the bottom of the circ pump. Don't forget about the oil cooler. I still pull the hose off it. My 64's cooler self drains. Is your boat equiped with a raw water strainer? The bowl will need to be unscrewed if it has one.

HW, Yes I have logs but the drains that Eric and I have decribed do come in 3/8" pipe too. Beyond that (1/2"?) a reducing bushing whould be required.

Anyone planing this should check their pipe sizes!!

Tim, Yes, It has "pleasure craft marine" Right on the ID tag with their numbering system. Was it a early PCM?

Tim, You put me into my research mode! I wasn't sure of those years with the engines and I was curious. Got in touch with a friend and this is his email responce:

"The Waukesha's are easily identified by the hi-rise manifolds. They were green and then painted black when PCM took them over. Waukesha built many different engines in the industrial field in, you guessed it, Waukesha WI. The Escorts, as I recall came out of Detroit, and had log manifolds and genuine Ford graphics, so I am assuming it was a later version of a Ford Industrial Engine previously known as Dearborn Interceptor. The Escorts and Waukesha's were available at the same time and as I recall, there was sometimes a slight difference in price, but not much. I remember ordering and picking up parts from a official Ford Industrial warehouse in Brookfield WI. I only remember one or two Commanders. I thought they were made in FLA."

Tim, The plot thickens!! I'll have to get a picture of my engine tag. Like I said, it says Pleasurecraft on it!!

How many engine block drain plugs are on my Excalibur (SB Chevy)? I believe there are only (2), starboard (1) has the knock sensor and the port side is tapped for the HW supply on the shower. Am I missing some? Both those I mentioned are forward on the block. Would like to add some of those drains like Pete showed if possible.

quinner wrote: I believe there are only (2), starboard (1) has the knock sensor and the port side is tapped for the HW supply on the shower. Would like to add some of those drains like Pete showed if possible.

Knock sensor or drain, can you do both?

Do Not modify the plumbing as to the knock sensor,it relies on the sound wave to detect detonation through the water jacket.
It is a piezo-electric system that has a specific location and distance to work properly........

Maybe I read that incorrectly, as i thought the plan was to TEE off the block with a petcock and use both......
Sorry for my ignorance,,,,,,,
As to the winterizeing, it is still a ways off,lows here in the 50's high's today 80....
I really feel for you guys and the temps there............................

Hollywood wrote: Doc that is what I'm asking! You can install these drains everywhere else but still left having to pull the knock sensor right?

Yeah, I think thats right.

I think Ive mentioned it before, but a piece of step flashing works great to keep the water off the carpet when draining.

boat dr wrote: I think because of the engine tilt removing the sensor is not needed, is it forward and slightly above the rear drain? If so this added step is not needed........

The new CC's have the engine mounted almost perfectly flat. According to that tutorial I linked to, there is only 1 drain per side, and the knock sensor is in one of them. Do you have to pull both drains, or will you get most of the water with just one (to avoid pulling the knock sensor)?

why do you ask M3, are you thinking the word is a verb