Rebuild time??

[Brent 41 9N]

I have been reading some of the other posts and topics of various nature. Found several suggestions to honing cylinder walls and such. I have a 41 9N. She has a little blow by, so I pulled the head to investigate. Found cylinder walls in the most horrible state. Never seen anything like it before. They were so worn, I swear you could drop a dime between the rings and walls on at least two of the cylinders.
I decided to replace head gasket and install new points. Points were burnt completely through. I mean Holes!! Keep in mind, she ran great!!! would skip occasionally (not very often) Just a little smoke and oily plugs.
I have rebuilt several motors of different breads. I was wandering, when should a motor be rebuilt? and How would honing cylinder walls help when the motor has worn past any reasonable amount of tolerance?

 

[Brent 41 9N]

Can they really be this indestructible????

 

[dont_know_nothing]

Does your engine still have the sleeves in them or have they been removed and over sized pistons used?
Nice thing about these are the sleeves, just replace them and engine is good to go. But a few removed them to get a little extra power and once the cylinder wall wear down the engine is pretty much shot because the walls are so thin to begin with..

Indestructible? No but they are well built and easy to work on. How else can so many survive through all the year. You can't drive through a country town without seeing an old red belly.

 

[Allthumbs]

I think it was Old that said that there are about 500 thousand still operational. Not indestructible, but pretty darn close.

 

[lha]

Indestructable? no but plenty well built and tough.Time to rebuild is ,like beauty--in the eyes of the beholder.One person,when he hears a knock,or sees a puff of smoke,it's rebuild time,another,when it can't be pulled off with ol' bubba's truck is the time to consider rebuild.To Me if your tractor still has sleeves,and is running,I would put it back together and run it,then when it won't run anymore,I'd have bought all the parts except bearings,and would be ready to commence rebuilding.My$.02---lha

 

[Walston]

Now that you have the new head gasket on, I would do a wet / dry compression test. It will tell you pretty quick if things need rebuilt. If it is as bad as you describe, you can't have much compression. Should be 90 psi dry.

Also, what is the oil pressure? cold and hot?