The change of tappets were to increase camshaft life . The package used a solid tappet with hardened bottom (or disc on bottom from v 8 engines) which is why the shorter push rod. Original tappet is hollow and does carry a lot of oil in it. The wide gap ring allowed more blow by and that is why they went to the top breather. Of course this change also led to more camshaft problems as the oil mist over camshaft was reduced with top breather. The very latest was a larger side breather but I never saw one of them installed on an engine.
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Today's Featured Article - The Great Escape - by Dave Hollrah. It all began Monday with a little baling of second crop on the lake shore field, and as I drove out past my sister and her hubby's place, this small calling sound could be heard from the general direction of their manure pile. Out of the yard, over the cows and bale piles, through the dozer piles, poplars, and brush, out onto the ditch grade road, past the noisy 6.2 diesel engine pulling my well traveled Suburban along. Well it sure didn't take me long to figure out what it was because I alrea
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