<VV> Odd sound - update
Bob Gilbert 1
bgilbert at gilberts-bc.ca
Wed Apr 16 18:10:48 EDT 2014
A few day ago I requested some help with a sound like a lifter noise but
with a sharper, "metallic" rap in my recently built (<500 miles) 3.1
Several people suggested a problem internal to the engine so I removed "the
top" of the engine, carbs on down to and including the turkey roaster.
Nothing is loose and there are no visible marks and no signs of part A
hitting part B and no sign of any foreign material.
I can turn the engine over easily by hand and there is no indication of
anything touching or obstructing anything.
And of course, with no plugs I can also spin it over quite fast with the
starter and still no unusual sound or vibration!
If it was a valve seat issue you'd think I be able to hear it.
I am stumped and the only thing I can think of is a lifter problem that
doesn't show up under these circumstances.
Is that possible?
Any other ideas or suggestions most welcome!
Meanwhile I have ordered a borescope to take a look inside the cylinders but
it will take a week to arrive.
Thanks in advance,
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