1950s M123 Gasser Engine knock

[Titanite92]

Good morning all (or whatever time it is for you),
I have a 1950s M123 with the Leroi th844. It would seem to have a pretty nasty knock, I'm guessing it's a crank bearing im not sure. It runs perfect, other than the knock. I don't know who else to ask, so I'm looking for solutions. Is it possible to get a set of bearings made if I'm right? What's the likelyhood somebody has a TH844 laying around? Lol, I know. Or is all for naught and I just need to throw a C13 and an Allison in there? Thanks all have a good day.

 

[NY Tom]

Engine LeRoi T-H844 | eBay

Engine LeRoi T-H844 cu gasoline rebuilt by greek army.

www.ebay.com

Not afiliated in any way.

 

[NY Tom]

Old Forge Power Equipment. Inc.

Find TRUCK & EQUIPMENT ENGINES, HEAVY EQUIPMENT, SUPPORT EQUIPMENT, TRUCKS and other equipment for sale at Old Forge Power Equipment. Inc.

www.oldforgepower.com

This is the diesel replacement. Hard to find not sure if this one is still available.

 

[Titanite92]

Engine LeRoi T-H844 | eBay

Engine LeRoi T-H844 cu gasoline rebuilt by greek army.

www.ebay.com

Not afiliated in any way.

I did see that, definitely an option if I cannot fix mine somehow. Thank you !

 

[Titanite92]

Old Forge Power Equipment. Inc.

Find TRUCK & EQUIPMENT ENGINES, HEAVY EQUIPMENT, SUPPORT EQUIPMENT, TRUCKS and other equipment for sale at Old Forge Power Equipment. Inc.

www.oldforgepower.com

This is the diesel replacement. Hard to find not sure if this one is still available.

That would be a nice option aswell

 

[NY Tom]

Yeah sorry I figure you know how to Google as well. But could not help myself.

I love reading this story as well. Previously mentioned on this site somewhere. Just for kicks you might enjoy.

VanNatta Big Trucks - The big 6x6 Mack M123A1C

Good luck with your project. Hope you can save the motor.

 

[G744]

I've seen a couple engine knocks in tacticals be broken accessory brackets (alternator/generator or compressor).

It was really tough to find them, but easier than an overhaul...