<VV> Installation of engine pistons

MarK Durham 62vair at gmail.com
Sat Oct 25 15:10:21 EDT 2014

Jerry, always follow the tech manual for the engine. Even when it appears
that everything is symmetrical and balanced. How else are you going to tell
what you have down the road or while you are working? If you do your work
in a inconsistent way, there are more chances to make mistakes, forget
something, etc, and aligning the piston marks and rod position numbers help
to provide that consistent work we rely on to provide years of trouble free

While I did assemble my engine 4 years ago, I did not check to see if there
was offset built into the location of the piston pin, or if the rods were
something else besides symmetrical. I have seen aircraft engines and
automotive engines were there were offsets in piston pin location to
compensate for say a piston leaning in a V-6 or V-8, or in a flat
configuration like aviation piston engines and Corvair motors are.

In short, follow the book!  :):)  If you don't, then you should not be
doing the work. You are bound to make mistakes.

Mark Durham
Hauser, Idaho
62 Monza coupe Red/Red 4 speed

On Sat, Oct 25, 2014 at 11:46 AM, Jerry Brown via VirtualVairs <
virtualvairs at corvair.org> wrote:

> Through the years I have had several persons tell me that when installing
> the pistons and rod to the crankshaft that it didn't matter if the piston
> didn't face the fly wheel because each rod had it own journal  to ride on
> and didn't share a journal like some Chevy straight 6 cylinders.  I know in
> the tech manual that it says the notch should face the flywheel.  Is there
> something in the mathematics that the rod number should be up and the notch
> facing the flywheel? I know some of you engine Gurus can help me on this so
> I can be sure if the these people telling me it's ok to install a piston
> backwards.   I have always followed the tech manuals instructions.  Jerry
> Brown
>  _______________________________________________
> This message was sent by the VirtualVairs mailing list, all copyrights are
> the property
> of the writer, please attribute properly. For help, mailto:
> vv-help at corvair.org
> This list sponsored by the Corvair Society of America,
> http://www.corvair.org/
> Post messages to: VirtualVairs at corvair.org
> Change your options:
> http://www.vv.corvair.org/mailman/options/virtualvairs
>  _______________________________________________

More information about the VirtualVairs mailing list