8N

[Grabatire]

Working on a late 8N with side mount distributor. The rotor doesn't turn. I pulled the distributor,and found the gear on the dist shaft is OK. Looking into the hole from which the dist came out of, the spiral gear looks OK too. What can I expect to find when I take the front off the engine?

 

[Bob]

Likely, a timing gear/camshaft gear with teeth ripped off.

 

[NoNewParts]

agree with Bob,
or if it has the pressed on cam gear, it has slipped.
Turning it over with the starter, it will sound 'funny', if the gear is turning and the cam isn't.(hard to describe, but I had a cam gear slipping once and it caught my ear right away when turning it over. [i:597bfc0be1]Why[/i:597bfc0be1] does it sound like [i:597bfc0be1]that[/i:597bfc0be1]? lol)
Different than it sounded before, if this was a running tractor.
I know you have checked the obvious, but....a recent thread
was about the cross-pin on the distributor gear being broken.
similar symptoms.
If this is a fencerow hasn't run tractor with an N's no pushrods design, badly stuck closed valves will sometimes make that cam gear slip (pressed-on ones)
when hit with a starters big torque or trying to pull it in gear.

 

[JimNC]

Grab, with the distributor out can you spin the shaft and make the rotor turn? Hold the rotor and then see if you can still spin the shaft.

 

[Hobo,NC]

(quoted from post at 10:53:54 10/24/15) Working on a late 8N with side mount distributor. The rotor doesn't turn. I pulled the distributor,and found the gear on the dist shaft is OK. Looking into the hole from which the dist came out of, the spiral gear looks OK too. What can I expect to find when I take the front off the engine?

Look and see if the crank pulley is turning when you engage the starter...

If NO the ring gear on the flywheel may be spinning/slipping...

 

[Grabatire]

Thanks for the replies fellas.

I checked the pin that connects the distributor drive gear to the shaft. It's OK. The front pulley turns with the starter engaged, and the looking into the hole from which the distributor is removed, the spiral gear at the bottom turns as well. I recognize that it may spin because there isn't any resistance to overcome after the distributor is removed. When turning the engine with the starter it sounds the same as before this issued occured.

The weather is supossed to be a bit crappy on Monday, so it will be a good time to work inside, as such I hope to know a bit more by Monday afternoon.

 

[JMOR]

" I recognize that it may spin because there isn't any resistance to overcome after the distributor is removed." Unless something is severely wrong with distributor, the valve gear will provide much more resistance to cam rotation than the distributor.

 

[ASEguy]

If the gear on the dist spins freely, bar the engine over to see if the cam gear spins in the distributor hole.

 

[JMOR]

(quoted from post at 06:35:17 10/25/15) If the gear on the dist spins freely, bar the engine over to see if the cam gear spins in the distributor hole.

ou might say that he already did. "... the spiral gear at the bottom turns as well". If spiral gear turns with cranking, then by default, the cam gear & cam are turning.

 

[souNdguy]

valves moving during cranking?