8n runs breifly then abruptly shutsdown

slapshot · Feb 3, 2011

I have a '51 8n that when its cold will start and run for 20-30 seconds or so then shuts down abruptly. While its running is fairly rough and squeals real loud like a fan belt. I've removed the fan belt and it still makes the same noise.
It does this while the clutch is in so I dont think its anything back half related.
It has oil. it has new wires plugs, coil, condenser and rotor. I have not dropped the oil pan yet to take a look, no fun when its 15 degrees.
Kinda stumped, crankshaft bearing? distributor shaft?

Thanks
-dave

Craig Clayton · Feb 3, 2011

Have you checked the action of the choke or the height of the float in the bowl.
Craig Clayton

kjung17 · Feb 3, 2011

If you've got a squeal when all of your belts are off then you've got metal on metal somewhere. I guess your starter could be hanging up also. Does it sound internal? Is the crankshaft pulley rubbing on anything?