You Guys Know Everything....
kneale brownson
...so is the circular item the feeze plug I need to remove to install a block heater in the Ford diesel engine in my New Holland 555E backhoe/loader so I can start it in the dead of winter?

Est. 1998 — 28 years of woodworking knowledge
You Guys Know Everything....
kneale brownson
...so is the circular item the feeze plug I need to remove to install a block heater in the Ford diesel engine in my New Holland 555E backhoe/loader so I can start it in the dead of winter?

Re: You Guys Know Everything....
Lee Schierer in McKean, PA
It is definitely a freeze plug.
Lee
Re: You Guys Know Everything....
Tom Dunlap
WHen I put in frost plug heaters there was a sheet with diagrams to show which plug to use for many engines. Find out from the parts store. There are locations that circulate better than others.
Have you ever punched out a frost plug? careful that you don't loose it inside the water jacket.
Re: You Guys Know Everything....
kneale brownson
Will it rattle? 
I was thinking drill a small hole, insert a drywall screw, attach a wire, then try to pry the plug out.
Re: You Guys Know Everything....
Mark Nowicki
Yes, but there usually are more than one.
Re: You Guys Know Everything....
Mark Nowicki
Don' t drill, the shavings can clog coolant passages.
A drywall screw won't pull it
Dick Coers
They are much tighter than that. Usually. Ask about a heater in the lower radiator hose. Much easier to mount. They also make magnetic oil pan heaters.
Remove...replace
Tom Dunlap
You tube has plenty of ways to remove the plug. Drywall screw puller isn't on eof them LOL. Need coarse threads and a dent puller if you go that route.
Lower engine hose and magnetic heaters work but are SOOOOO much less efficient. As a last resort they might be chosen but only if you want a C grade rather than an A grade on your project. It only takes about two hours, if that, to bring a subzero engine up to warmth. No need for the all night plug in.
Re: A drywall screw won't pull it
Kneale Brownson
Screw was to prevent the plug falling into the block. Really don't like the hose mounting idea.
I dunno...
Jim Matthews
Lotsa older fittings between you and the block.
I'm thinking dipstick heater if you have an oil dipstick.
They're cheap, commonly available and require no modifications.
https://www.tractorsupply.com/tsc/product/kats-engine-heaters-dip-stick-heater
Re: You Guys Know Everything....
Clint Searl
Don't know about that, but make sure the fuel doesn't jell.
Re: You Guys Know Everything....
AZ in Colorado Springs
I installed a block heater in my Nissan pickup truck 35 years ago. I punched into the freeze plug with a big screw driver (and a hammer) and pried it out. Simple. (Wow, that was a long time ago.)
Re: You Guys Know Everything....
John McGaw
Yeah. I've done it one time, also many years ago, and that is how I did it. "Freeze plug" heaters are so common in Alaska that many (most?) cars come from the dealer with at least one installed. My VW diesel didn't have one so I had to put one in and then add a battery blanket. Bad thing is that even with that, if the sudden cold snap showed up while you still had #2 diesel in the tank rather than the winter-necessitated #1 diesel, you would wind up with jelly clogging the fuel system anyway. There are fixes for the latter including adding a small bit of gasoline (scary!) to the fuel and finding some way to heat the vehicle for long enough to start it and get the fuel mixed up.