Odd Freeze Plugs

[Two Stroke Madness]

I was looking over my M817 a couple of days ago and noticed something strange on the engine. There are three different styles of freeze plugs on the heads. Each head has a different style of plug. One head has a typical push in style plug the other two have what looks like screw in style plugs. One head has allen drive and the other square drive. The other two 5-tons that I have all have the same push in style freeze plugs. Does this mean that the engine is a possible rebuild? Or is this something that could have come from Cummins? Any insight would be appreciated.

 

[Ferroequinologist]

Pictures would help if possible. Haven't seen what you are describing and I have worked on a 100 5 tons. Maybe they are replacement plugs? Easy to install on the road if you blow one and can get at the plug. My 817 rusted one out betweem the 2nd and 3rd heads. Had to do a whole top end because of that!

 

[Two Stroke Madness]

I'll try to get some pictures when it's light out. As soon as I figure out how to load them.

 

[Two Stroke Madness]

OK. Here's what I'm talking about.

 

[simp5782]

They have just been replaced. The Cummins 4bt's have these as a replacement option.