LisaK

Member
I'm looking at a 9n I think is really a 2n..owner says it was running good till a hole got burnt in the top of one piston. What causes that and what are the odds I could just put a new/good used piston in that cylinder and call it good?
 
Timing advanced to much will burn a hole in a piston.

Could also have a foreign object on top of the piston that
was sucked in through the intake manifold.

Did the owner tear it down?

How does he know it has a hole in the piston?
 
He took the head off....its got nice mismatched rears that would make matches to my mismatched, step up Sherman, real good sheet metal. $600 firm. I talked to him yesterday and he wouldn't hold it a few hrs till we could get there well whoever was going to look at it didn't show. I told him it would have been sold if he had said yes I'll hold it. It's 2.5 hrs from me
 
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That sounds good to me , especially with the
tire match . I have replaced 2 pistons on a Ford
223 six cylinder, ran fine . I'm guessing the
cyl isn't rusty from being open ?..Go for it !
 
The tires are worth more than $600. If you get it and can't get it running, sell it for parts. You should be able to easily double or triple your money.
 
it looks like they put the head back on which is good. I assume it would still run on 3 cylinders correct? The 8n I'm rebuilding ran pretty good on 2 so I don't see why not.
 
I thought it was a decent deal. I'm trying to get him to hold it till Friday evening. We'll see I guess
 
It will probably run, creating very little power.

The crankcase pressure will blow lots of oil out of the breather.

Dean
 
ya that would be the first thing I removed. Hate them damn filters. Guy said he will hold it for me so I'll report back when I get it and check it out
 
Finally got to talk to the owner..He stated that there isn't a hole in the piston but that cylinders 2&3 rings broke and it needs new sleeves due to that. Why haven't I invested in a sleeve tool yet?!!!
 
I had broken rings in my 9n. I didn't have the sleeve tool. I used a screw driver and a hammer to to split the sleeve and take it out in pieces. I then put the new sleeve in the deep freezer over night (the cold air shrinks it and makes it smaller) and hammered it into the block with a hammer and block of wood and a lot of WD40.

Didn't have any special tools. I bought only one new sleeve from external_link. At that time one sleeve was $22.00. Put new rings in and reused the old pistons. For some reason my 9n had power crater pistons. never seen that before in a Ford.
 
This freezer idea gets discussed a lot so just for giggles I did the expansion calcualtions. Assuming your freezer is 0F and the sleeve was machined at 70F chilling that sleeve in the freezer will reduce the diameter by:

ΔD = .0000065 in/in-F x 3in x 70F = .0014in

Think about that for a minute. For all practical purposes you still have a contact fit between the block bore and the sleeve. That sleeve is going to start to warm up VERY quickly once it contacts the top of the bore and your sleeve expands back to it's original diamter. You might as well skip the freezer step because it's buying you very little if anything.

TOH
 
I see you have a few different options. Too many for me to choose the right one. What would be your suggestion.[/quote]

If you have the engine upside down on the ground or on a stand the sleeves can be driven out with a simple bushing driver style tool.

If you need to get them out while the engine is still attached to the tractor you need the puller frame and the appropriate bushing (aka "puck").

The .090 sleeves can be driven in with a "puck" similar to the removal tool but with a wider shoulder. The .040 sleeves can be drivien in with that same tool but the thin wall sleeves are considearably less robust and the long OEM style installer greatly reduces the risk of breaking them.

If you plan on doing a lot of N-series sleeve work the combination set containing the puller frame, OEM style 120 CID sleeve installer, and a set of 120 CID sleeve removal "pucks" is probably what you want. It doesn't take many uses to pay for itself. You can use that same puller frame to R&R sleeves in the 134 and 192 engines with the addition of the appropriate "puck".

TOH
 
Lisa, make your life easier and send TOH some money.
I'm very glad I did.
Another full set of sleeves R&R and I'll consider tools paid for themselves :)
 
That's the plan. We've got a few sure will.get rebuilt and who knows how any more in the future. Was just going to send him an email.
 
(quoted from post at 18:00:14 08/19/15) it looks like they put the head back on which is good. I assume it would still run on 3 cylinders correct? The 8n I'm rebuilding ran pretty good on 2 so I don't see why not.

A plug wire falls out of the front mount dizzy on my 8N every so often and it still starts and runs on 3. Not well but it runs. I know something is wrong when I smell raw gas.
 

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