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#1
11-26-2011, 01:34 PM
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I found the problem
I rebuilt a spare k321 a couple years ago for my 1450, now i'm getting around to rebuilding the original k321 to use as a backup. The original motor ran ok, but seemed to lose power when put under heavy load....always seemed like the governor couldn't keep up....never did find the problem till i broke the motor down this weekend....
 Intake cam lobe was squared off....exhaust lobe was fine. Had a spare cam so that was installed...once i get it back together i think it will pull much better under load. metalrain 
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#2
11-26-2011, 03:05 PM
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How'd it do that? Looks like it ran quite a while like that, Must be factory to be full across the lobe. Maybe good core for custom grind! Or drop it and watch it break like we used to do w/305 Chevy cams
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Clay
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#3
11-26-2011, 04:37 PM
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I'd like to know how it happened to. I ran the motor for about a year. Don't know the complete history of the machine, but the guy i bought it from said he bought it from a farmer who said it sat for a few years once he couldn't get it started.
The previous owner did get it running but did nothing internally to the motor. It ran ok after i got it...smoke alittle, started easy, but if you asked it to do to much under load, it seemed to bog down and lose power. Didn't seem anybody was ever inside the motor...all stock parts, standard piston/crank/and rod. Machine shop needed to bore it 10 over and exhaust valve was shot. The lifter shows no wear....wonder if the cam wasn't like that since the beginning....I've never seen one wear that bad.
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#5
11-26-2011, 06:40 PM
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I'm really thinking it had to come defective from the factory like that. Heres another pic...the bottom edge is slightly rolled over and sharp as a razor. I'm stumped how this could happen naturally over the coarse of its life without showing damage someplace else...
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#8
11-26-2011, 07:16 PM
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bad from the factory
Man, that must have caused some interesting valve dynamics. Hard to make anything respond quickly to instant transitions like those hard corners . I'd guess at mid rev and above the valve train floated over that flat spot.
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61 and 63 Originals 123 (2) 782D 106, 147, 122 102 parts It's only original ONCE!
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#10
11-26-2011, 11:50 PM
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Don't get me started on 6 sigma, I worked for a company that pushed that on us and it was a huge waist of time. It may work for some places but not in the mobile auto glass industry!
Randy
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2 original cub cadets  1 100's 2 149's 1 73 1 2182
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