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compression on cub

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Farmallb

10-05-2007 17:53:23




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I replasced the main bearings, the bearings on the rods, rings. I cant get any compression on 2 and 50/60lbs omn the other 2. It bearely runs, and when it does, it only runs for a couple menutes. I have heard that it might be in the valves. 2 questions. Could the rings not be seating causing the loss of compression. Same with the valves? Thoughts appriciated. Thanks




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Gene

10-05-2007 20:20:56




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 Re: compression on cub in reply to Farmallb, 10-05-2007 17:53:23  
Yup on what El Toro said.

Sticking valves on two cylinders. Did you lap the valves - or do any valve work?



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El Toro

10-05-2007 18:16:45




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 Re: compression on cub in reply to Farmallb, 10-05-2007 17:53:23  
Are you sure the valves have enough clearance? They call for .013" cold. Did you measure the ring gap? You should have around .007" to .017" on the compression rings and .007" to .015" on the one piece oil ring unless you had the 2 rails and expander for the oil ring. You should've used a glaze breaker in each cylinder to remove that glaze from the old rings too. This gives the rings a new surface to seat in. Hal

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