<VV> too much trans fluid causing an ominous knock?

[shortle]

I would try to figure out the knock before taking it all apart. Does the oil smell burned? Have you hooked up an oil pressure gauge and checked pressures cold and hot? The only reason for plastigaging is to determine you are using the correct sized parts (bearings matched to crankshaft). I always do this test and have never had incorrect parts. Now I'll be sure to do this check if you have incorrectly matched pieces. If indeed you have "spun a bearing", you have no need to plastigage at this time. I wish you well.
Timothy Shortle in Durango Colorado 

-----Original Message-----
>From: Jedd Hebrink <jhebrink at anvilcom.com>
>Sent: Dec 29, 2008 10:30 AM
>To: virtualvairs at corvair.org
>Subject: Re: <VV> too much trans fluid causing an ominous knock?
>
> 
>Thanks to the many who have responded with helpful information on this
>topic.  I understand the transmission fluid level question now, and it makes
>sense that after sitting in my shop for several months, the fluid leaked
>down.
> 
>The knock sounds more like a con rod knock, not a detonation knock.  I have
>checked compression in all six cylinders, and found them to all be
>acceptable.  When I rebuilt the engine a few months ago, I did install new
>pistons, sleeves, rods, and bearings.  I did NOT use Plastigage, and I think
>that I am learning this lesson the hard way.  Many of you reminded me that
>one should ALWAYS use Plastigage when rebuilding an engine.  Armed with
>Plastigage, I am prepared to split the crankcase and measure bearing
>tolerances.  I suspect I may have spun a bearing or otherwise created a
>problem with the crankshaft or connecting rods.  I won't go into the long
>story again now, but the bearings I received from one of the popular Corvair
>vendors were not packaged well, and had tumbled around in transit.  There
>were several gouges or deep scratches in some of the bearings.  I posted a
>question about this before I put the bearings in, and received differing
>opinions on whether I should use them.  I took the easy way out, and
>smoothed the scratches with some fine emory cloth.  Now I wish I would have
>waited and purchased new bearings, because I suspect the scratched bearings
>may have something to do with my current problem.
> 
>Pulling the engine is not such a difficult thing to do, so I plan to go
>ahead with that over the next few days while I am off from work.
> 
>Thanks again for all the valuable advice; it is much appreciated.  Happy New
>Year to all!
>Jedd Hebrink
>66 Monza 110 PG
> 
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