Bay City Cat Engine Teardown | The Struggle is Real 

Awesome! I love that type of info

@@ScrappyIndustries Living in the Peoria, IL area, I am aware of a lot of CAT's history. Thanks

He's picking up too many of Matt's bad habits......

I agree!! Didnt know I couldnt live without it

​@@ScrappyIndustriesthe remote is a game changer/labor saver!

It's kind of exciting when it happens. A cloud of aluminum bits came out the exhaust while the engine knocked. Bent rod, destroyed lifters but ran enough to get the tractor loaded.

You beat me to the punch. That was a cat design, a poor one but cat none the less. I have seen one fail before, cascading catastrophic failure ensuing. Check out squatch channel, he has a lot of information on these old cat engines, might even be able to steer you in the direction of the newer updated design pistons to fix yours.

Thanks i went and checked out a couple of his videos he definitely has a lot of knowledge on the old cats!

​@ScrappyIndustries oh yea he has an insane amount of knowledge about old cats I love watching his content

That 2 piece piston design is absolutely insane! I would have never in a million braincells thought that would be a factory concept!?!? Blowing my mind to think that actually worked 🤯🤯🤯🤯🤯

Thank you i really appreciate it!

@@ScrappyIndustries as an engineer with over 50 years experience, although for me it was big ship engines, I really enjoy watching you work on this kind of engine. It gives me faith in the younger generations. 👍

Interesting that they used copper shims to adjust cylinder liner protrusion. I wonder why Cat stopped doing that because cutting the block to adjust liner protrusion can be kind of a pain when doing an in-frame in my opinion. With regards to engines running with a broken crank I have seen that on 5 or 6 engines including on in an Alcohol Dragster that had just set a new track record. The only reason we found it was because when we were baring the engine over in the pits backwards while leaking the engine and replacing the valve springs the engine locked up tighter than a drum. In reality it was a fortunate thing because I seriously doubt it would have survived the next pass. I also have seen tops of pistons break off and the engine continued to run albeit it had a miss but it didn’t smoke or make any strange noises.

My first “real” mechanic job was working for the local Allis-Chalmers dealership. We had a customer bring in a WD that needed an overhaul. I got the job of doing an in-frame on it. Got it done and running good and shipped it. A few weeks later the tractor was back in the shop making a horrible knocking noise coming from the bottom end. I felt terrible because I thought I could have messed up something. Turned out to be a broken crank. Our working theory was that the crank had a defect, and the increased power after the rebuild caused it to finally fail.

@@gullreefclub I work on mostly John Deere equipment and with some of the rebuild kits now days the liners are not as thick on the top so I've used up to 35 thou shims on them , also I'm no stranger to mixing up parts to get things fixed.

I agree 100% guess I didn’t really show top bearing on camera. I checked up and down play with the crank at 90 where I felt most wear would be. They’re pretty fresh

Thanks! We’re getting there. We assembled the short block this past weekend

Looks like he is going to do a transplant next.

Thanks for watching!