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8n Lifter Bores

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Rodney (La)

04-09-2007 07:59:15




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I had a dead cylinder on the tractor and did a compression test and #2 had no compression. Pulled the head & valve chamber cover and had a exhaust valve that the retainer lock had come off and the valve was just floating around. No damage done. I decided to go ahead and rebuild the whole engine while I was there and seperated it from the tractor. After I removed the valve train I noticed that the lifters were sloppy in the bores. I was surprised that every one is wore the same amount and was wondering if this is normal. I have a metal machine shop but I would not begin to know how to set up and put bushings in the bores or if there are bushings available.
I know a small block chevy would come apart with that much play in the lifters. The lifters are not scored or wore and are still round. I did not measure the clearance but I feel that it is about 1/32" or more movement at the top of the lifter while the lifter is on the heel of the cam. Any help or information would be appreciated in this matter.
Thanks,

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DonCam

04-09-2007 11:40:19




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 Re: 8n Lifter Bores in reply to Rodney (La), 04-09-2007 07:59:15  
This is just my opinion not a fact for sure. Since the engine is a slow turner compared to a car engine and if you still have good oil pressure I would think you'll be ok. I am like you I always rebuilt car engines and wanted things to be perfect. I pulled a crank out of an allis chalmers I had and it looked like it needed to be turned, I would have had it turned if a car engine. I ended up talking to a guy that rebuilds airplane engines he said the crank would be fine becuase of the low rpm, he'd seen worse cranks put back into airplane engines. That made me feel real good about flying in a piston driven plane but guess it's ok. JMHO on the lifter bores though.

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