<VV> engine knock

[Cliff Tibbitts]

Two ideas.  There will of course be many more.  If using the original
pistons and rods, then yes there is a definite difference if the pistons and
rods are installed upside down.  The wrist pins in the original pistons are
slightly offset from dead center, and I am sure it would make a difference
if they were installed upside down.  How much?  I don't know. Secondly, one
of the rods might not have been torqued properly and is about to come apart.


Sounds like a tear down to me.  But hey, I'm the new kid on the block.  Wait
till the rest of the replies come in. 

Cliff Tibbitts
Lexington, KY
66 Monza 140/4 speed

-----Original Message-----
From: virtualvairs-bounces at corvair.org
[mailto:virtualvairs-bounces at corvair.org] On Behalf Of Dennis Dorogi
Sent: Wednesday, September 06, 2006 10:26 PM
To: virtualvairs at corvair.org
Subject: <VV> engine knock

A guy from a nearby town brought over a 63 Spyder convertible with a 95 hp
engine in it.  It has an engine knock unlike anything I have ever heard.  It
is a very pulsating knock and you can feel it when you touch the engine or
while driving it.  Pulled plug wires and there was no difference in the
sound.  It recently had the rod bearings replaced and almost sounds like a
bent rod.  What would happen if a rod was rotated or the numbers not up as
they should be.  Would this result in a knock?  It is the only thing I can
think of.  It doesn't sound like a main bearing but I guess it could be.
      The engine seems to run and idle OK but it also has no oil pressure
showing on the guage but I think that is a wiring, sender, or guage problem
as he drove it over 40 miles to get here and it is still going.  This is not
much to go on but I think it has something to do with the rod bearings being
worked on.  They were replaced with standard inserts but  the originals
didn't look that bad to me.    Any ideas?   Dennis Dorogi
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