Posted by Bob M on June 22, 2009 at 10:40:47 from (151.190.254.108):
In Reply to: M Stuck Valves posted by RickAshman on June 22, 2009 at 09:19:53:
Rick - First make sure it's not an ignition problem (fouled plugs, broken or swapped plug wires, etc).
If the spark is OK remove the rocker box and check valve action and valve lash on the affected cylinders.
You may find a momentarily sticking valve has caused a pushrod or two to become disengaged. It's not unusual for an M that's been sitting a while (it happens to one of mine the first start EVERY spring).
If a valve is stuck, try soaking it repeatedly with PB Blaster, ATF or your own favorite "snake oil" penetrant. GENTLY tapping/pushing down on the rocker above the valve stem between applications of penetrant will sometimes free up a lightly stuck valve.
However if the valve not work free you'll need to remove the head. And while the head's off check for bent pushrods on the affected cylinders.
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Today's Featured Article - Introduction to the Gibson Model D - by Brandon Burnett. The Gibson Manufacturing Corporation was founded 1946 by Wilber Gibson. The Gibson tractors were made from around 1948 to 1952. The picture shown here is of a 1948 Gibson model D. If you notice, this tractor is driven with a lever. You could get a attachment to convert it to a steering wheel.
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