Posted by Steve@Advance on November 11, 2022 at 16:38:38 from (99.190.215.237):
In Reply to: Ford 640 compression posted by Ramseyer35 on November 11, 2022 at 16:16:06:
Did it ever run after the head was put back on? Were the valves adjusted?
Since it has been sitting, chances are the cylinders are dry, and the valve seats are rusty, maybe the valve stems are also rusty and may be stuck open. Usually stuck valves can be freed up with some oil on the stems and prying between the spring coils. Just be careful to pry evenly on both sides so not to bend the stems! If the valves were not adjusted after the head was put back on, that must be done!
Try putting a teaspoon of oil in each cylinder, let it sit a day or so, then spin it out. That should raise the compression enough that it will start.
Once running and up to temperature, if this is the first start, the head bolts will need to be retorqued and the valve lash set again.
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