Damaged 283 piston out

M

morgan in ar

Member

• Sep 17, 2019

• #1

I got the piston out this afternoon. I didn't even need to ridge ream it. It's definitely toast, crushed ring groove. The ring is broken, also. I will take it to the machine shop tomorrow, so they can put a new one on that rod. I don't see anything stamped on the pistons or bearing inserts. I think it is all original. I can't tell what went in the cylinder. Maybe a lock washer, it looks like a piece of one stuck in the edge of that piston. If that is a piece of lock washer, it is bigger than any of the hardware around the carburetor.

 

D

David G

Well-known Member

• Sep 17, 2019

• #1

Is this the one with scored cylinder?

 

OP

OP

M

morgan in ar

Member

• Sep 17, 2019

• #1

Yes

 

S

Steve@Advance

Well-known Member

• Sep 17, 2019

• #1

Have you tried to hone the cylinder yet?

 

S

Sprint 6

Well-known Member

• Sep 17, 2019

• #1

You do understand it is most likely going to chug oil with that score in the cylinder wall?

 

R

Roger in Iowa

Well-known Member

• Sep 17, 2019

• #1

You have a not so nice friend drop something down the throat of the carburetor? Anyone have access to your vehicle just before this happened?

 

OP

OP

M

morgan in ar

Member

• Sep 17, 2019

• #1

Not yet.

 

OP

OP

M

morgan in ar

Member

• Sep 17, 2019

• #1

I'm going to try to hone it out. I'm sure it won't be perfect.

 

Gambles

Well-known Member

• Sep 17, 2019

• #1

Just remember that you've got to measure the gap between the piston and the cylinder wall, especially the top of the cylinder wall. Too much gap will break the piston ring or rings. It happens because the whole ring wants to "twist", as in the inside of the ring will be lower or higher than the outside of the ring. Hard to describe, but easy to show in person.

 

N

NC Wayne

Member

• Sep 17, 2019

• #1

Could the broken piece be the side electrode from a spark plug?

 

R

r.w.b.

Well-known Member

• Sep 18, 2019

• #1

Make sure no ridge at top of cylinder,if so it will break new rings,mess up new piston

 

S

Sprint 6

Well-known Member

• Sep 18, 2019

• #1

That score won't hone out. Honing is to produce a wall pattern for the rings to seat and only cuts a couple thousandths. Honing is only for cylinders freshly bored, or reasonably good shape. You will also be getting honing grit in the engine, not good. Even if you can hone the score out (and it will take a looooong time) the cylinder will be over size and out of round, which will cause oil burning and piston slap. I do this professionally, and hate seeing people spend time and good money on a bad repair. But it's your time and money to do with as you please.

 

OP

OP

M

morgan in ar

Member

• Sep 18, 2019

• #1

Sprint- I appreciate your input. I really do. My options at this point are to try this, or buy a salvage engine. I figure I can do this repair with less labor and about the same cost as a salvage engine. The condition of the salvage engine would be also unknown. The upside of the salvage engine would be that the original one would be sitting ready for a rebuild. I don't expect it to be as good as it was, but I have heard of these engines running in grain trucks with one piston completely removed and a wood block plugging the cylinder. Good or bad, I will let you all know how it turns out.

 

M

miangus

Well-known Member

• Sep 18, 2019

• #1

Make sure there is no ridge, things will go badly if there is. After getting any ridge removed, I would ball hone and put in a used piston with new rings. The vertical scratch will not hone out without making the cylinder larger. A small vertical cut will not cause much of an issue on a well used engine.

 

47fivewindow

Well-known Member

Location

Davidsonville Md.

• Sep 18, 2019

• #1

I have pulled down plenty of engines that were running ok with small scores. I vote go for it.

 

L

Leroy

Well-known Member

• Sep 18, 2019

• #1

That is my thoughts, what I would do.

 

S

Sprint 6

Well-known Member

• Sep 18, 2019

• #1

Running with one piston removed stories are just that, stories. A 283 with one rod missing has no oil pressure.

 

OP

OP

M

morgan in ar

Member

• Sep 18, 2019

• #1

Makes sense! Thanks.

 

O

Ozlander

Well-known Member

• Sep 18, 2019

• #1

(quoted from post at 09:41:11 09/18/19) Running with one piston removed stories are just that, stories. A 283 with one rod missing has no oil pressure.

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Not if it's done right.