Posted by pete 23 on September 03, 2012 at 19:51:01 from (74.32.238.2):
In Reply to: super H posted by rick deere on September 03, 2012 at 17:36:33:
Most likely you have excessive clearance on your rocker arm bushings. When they wear you get a whole lot of extra oil all over that top end. There is plenty of drain area along side of push rods but the extra oil will be slopping all over the tops of those rocker arms and onto the valves.
During the hay days of the 460 gas tractors out this way, we had a spanking new one useing oil like crazy. Before I had a chance to get it back in to check it out, IH sent out a service letter. If you are experiencing excessive oil consumption on the C-221 & C-263 engines, first off check the rocker arms. They had two suppliers of rockers and one of them had missed the step in production of pinching the oil trough on the top of the rocker arm. Therefore the valves were getting flooded with oil. I don't think IH was using any type of umbrella and or o-ring at the time. They changed back and forth so much on those it was hard to keep track of it. Anyway, I pulled the head as engine was badly carboned already. Pinched the rockers to specs and also installed PC valve seals. Dried her right up. I have found a lot of worn rocker arms and shafts on those 4 cyl engines over the years.
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