Posted by MSM on March 13, 2020 at 09:54:30 from (172.58.190.130):
In Reply to: Valve job posted by Gary Mitchell on March 13, 2020 at 08:27:19:
50 years ago you would grind the seats. Now the seats are cut or replaced depending on how many times the seats have been ground or how far the seats are hammered down, or are old style soft seats which will wear quickly since the onset of unleaded gas not having any lubrication for the valves and seats. Now there is a spec for valve standout, especially on diesels. If the valves are too low compression is affected and the engine will be hard starting even when hot.last 4 cylinder gas head i had done was right at 500.it was resurfaced, seats and guides replaced, a couple of valves replaced. Last 4 cylinder diesel head I had done was 750. All new valves and seats, valve guides, flat surfaced, guides machined for umbrella seals, assembled and pressure tested.
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Today's Featured Article - Grain Threshing in the Early 40's - by Jerry D. Coleman. How many of you can sit there and say that you have plowed with a mule? Well I would say not many, but maybe a few. This story is about the day my Grandfather Brown (true name) decided along with my parents to purchase a new Ford tractor. It wasn't really new except to us. The year was about 1967 and my father found a good used Ford 601 tractor to use on the farm instead of "Bob", our old mule. Now my grandfather had had this mule since the mid 40's and he was getting some age on him. S
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