1948 8N Engine Noise

I have a 1948 or 1949 8N, I can not read the serial number, that started running badly while I was mowing. I decided it was time to change the points, rotor, distributor cap, plug wires, plugs and condenser. I took the hood and gas tank off the tractor to get to everything. While pulling the front spark plug it came apart and left the bottom half still screwed into the plug hole. I took an e-z-out and removed the threaded part of the spark plug. I also made sure I did not insert the e-z-out too far into the cylinder cavity and hit the top of the piston. And nothing fell into the cylinger. After changing all of these components the tractor started right up. I also changed the oil and filter while I had it down. Anyway, I decided to drive it around the yard a bit before I considered myself finished with the project. After running it for 5 minutes or so I heard a loud noise coming from the front of the engine and fan area. I thought I may have not gotten the fan and shroud and radiator lined up correctly or maybe a bent fan blade hitting the shroud so I PULLED it back into the shop. I did not start it and drive it though. After taking the fan belt off and eliminating that as a possible source of the noise, the noise continued. Any help from you guys is appreciated.

Jerry

Well first off you will get a lot more help down in the 9N/2n/8N forum. 2nd there is no need to remove all that stuff to do a simple tune up. The distributor comes off with 2 bolts and can not be put back on wrong unless you force it on. Not as for the noise what is your oil pressure?? Also check your cap/rotor that maybe be the problem also with all this China junk we have now days

If you cannot account for the tip of the electrode, or the ground electrode what you have is a chunk of sparkplug being smashed into the top of the piston. It is the most likely thing i can think of. You can use a bore scope, or if you have grea eyes and a good tiny LED light, to look at the top of that piston when it is down a little in the hole. If you can pick the chunk out of the piston, and remove it, allis well. If it does not budge pulling the head is the only way. Jim

I am not familiar with that forum. How do I access it?

Click on discussion forums, scrowl down to ford 8n 9n 2n, and do the same thing you did here.