<VV> Cleaning Piston Crowns

[Paul Fox]

I'd be careful doing that any other way than driving it hard. The reason is, if it comes off all at the once it falls to the bottom of the chamber and can jam the pistons so you can't turn the engine. I've had this happen more than once. When it happened I thought something was broken inside the engine. after I pulled the heads it was just carbon that had collected in the quench area of the chamber. 
On Wednesday, April 2, 2014 1:13 PM, "corvairduval at cox.net" <corvairduval at cox.net> wrote:
  
I don't know a best way, but...

I strongly recommend you pull the pistons out of the engine (by removing
rods from engine) to examine them closely for cracks.

If you find none, you can put them right back in, just keep the same
bearing shells in the same locations.

The OEM pistons crack a lot. Especially around the oil ring groove. This
causes the top of the piston to come off.

Frank DuVal


Original email:
-----------------
From: Paul Michalczyk paulm at tdl.com
Date: Wed, 2 Apr 2014 10:01:34 -0700
To: virtualvairs at corvair.org
Subject: <VV> Cleaning Piston Crowns





I'm preparing a spare engine for my 65 140 Corsa and don't want to tear 
things down further than I need to. What's the best way to remove carbon 
buildup on the piston tops without removing the pistons and rods from 
the engine?

Paul Michalczyk, owner of L100268 since May, 1966

--------------------------------------------------------------------
mail2web.com  What can On Demand Business Solutions do for you?
http://link.mail2web.com/Business/SharePoint


_______________________________________________
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
_______________________________________________