New special alloy cast valves A-6505-A2 are now being used in production in all engines for exhaust valves only. The regular valve A-6505-Al is used for the intake valves. The A-6505-A2 valves are available for service when it is necessary to replace an exhaust valve. The A-6505-Al’s should be used for the intakes. The A-6505-A2 …
A-6513-Al valve spring has been obsoleted. The new valve spring A-6513-A2 can be easily distinguished from the old design as the free length of the new spring is 2 15/16”; the free length of the old spring is 3” 7/16. In addition the new spring has 11 left hand coils whereas the old spring had …
The clearance of gap limits between valves and push rods has been changed from .013 to .015” to .011 to .014”. The gap must be measured with the push rod on the heel of the cam.
Clean Carbon and Grind Valves ((Fig. 445)). The all steel valves used in the model “A” engine are accurately ground in at the factory. They form an ideal seat in the cast iron block, consequently they should require no further attention for some time. Grinding Valves Drain water. Loosen radiator stay rods at radiator. Pull …
The valves in the model “A” engine are accurately ground at the factory and should require no further attention for sometime. When it does become necessary to grind the valves, use a vacuum cup type valve grinder. This is necessary as the faces of the valves are machined smooth. To grind valves, hold the handle …
Vacuum Cup Ginder Used for Grinding Model “A” Valves Read More »
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