It could be burning the lost oil in the combustion chamber. How much fuel did it burn in that same time? If you dumped two quarts of oil into that amount of fuel you probably would not see any change in the exhaust. How much blow by is there past the piston rings? If the PCV system is working, high blow by could all be pulled into the intake and burned with little smoke out the exhaust. Worn valve guides usually shows up as a puff of blue smoke at startup.
A leak down test could pinpoint the problem or reveal if all of the engine is worn.
The big question now is will you use a 50 year old truck enough in the future to justify an overhaul or a re-manufactured short block?
Dumb question: Would new valve seals over worn intake valve guides starve the valves guides of lubrication and accelerate guide wear even more?
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Today's Featured Article - Women and Tractors - by Teri Burkholder. The View from the Garage - Never a doubt, everything on our farm is a learning experience. I've been working very hard to get our two rundown Farmall A's sanded, primed , bondo�d, fiberglassed and painted before our big local tractor show called the Tulip Festival. My husband Ben came in the garage one rainy day to see if he could "help". Well if you knew Ben you wouldn't want him anywhere near your spray gun, fiberglass or bondo! So I pulled out the 2 old yucky looking magne
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