Rough
Running (Shaking) 1937-1939 |
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Rough Running (Shaking) 1937-1939 -- There have been
several cases of rough running Buick engines in the 1937, '38 and '39 models. Improper
engine mounting adjustments are one cause and misalignment of clutch, flywheel and
crankshaft another. To check for the first cause, test car with front mounting bolts
removed. If the noise is eliminated, examine front mountings and frame brackets to locate
points of contact. When found, file off metal or drill bolt holes to larger size for
clearance. To test for the second cause, do not remove clutch assembly from engine as
formerly recommended. Remove one screw holding clutch cover to flywheel and test engine.
Replace screw and try with next adjacent screw removed. Continue this procedure until
engine has been tried with each screw removed -- separately. Determine location of screw
where engine operated smoothest with that screw removed. This is the heavy side of the
flywheel, crankshaft and rod assembly as a unit. Remove metal at the heavy side by
drilling into flywheel flange with a 3/8" drill -- not more than 1/4" deep. Try
engine intermittently to determine when sufficient metal has been removed. -- Terry Boyce,
#3019. Reprinted from 3,000 Tricks of the Trade, published by Automotive Digest sometime
around 1943. -- There have been
several cases of rough running Buick engines in the 1937, '38 and '39 models. Improper
engine mounting adjustments are one cause and misalignment of clutch, flywheel and
crankshaft another.
To check for the first cause, test car with front mounting bolts removed. If the noise is eliminated, examine front mountings and frame brackets to locate points of contact. When found, file off metal or drill bolt holes to larger size for clearance. To test for the second cause, do not remove clutch assembly from engine as formerly recommended. Remove one screw holding clutch cover to flywheel and test engine. Replace screw and try with next adjacent screw removed. Continue this procedure until engine has been tried with each screw removed -- separately. Determine location of screw where engine operated smoothest with that screw removed. This is the heavy side of the flywheel, crankshaft and rod assembly as a unit. Remove metal at the heavy side by drilling into flywheel flange with a 3/8" drill -- not more than 1/4" deep. Try engine intermittently to determine when sufficient metal has been removed. Terry Boyce, #3019. Reprinted from 3,000 Tricks of the Trade, published by Automotive Digest sometime around 1943.
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