Will PB Blaster or WD-40 negatively impact a cylinder bore?

[rocco16v at netzero.net (L F)]

I like the Kroil family of penetrating oils as well.  Let the stuff sit for at least a full day and keep adding a little more every few hours.

Larry
  ----- Original Message ----- 
  From: Chris Miller 
  To: jtoomasson@yahoo.com 
  Cc: scirocco-l@scirocco.org 
  Sent: Monday, July 28, 2003 11:41 AM
  Subject: Re: Will PB Blaster or WD-40 negatively impact a cylinder bore?


  I'd use a true penetrating oil to free the rings; I like Kroil. 
   Afterwards, use WD-40 to keep the cylinder walls free of rust until 
  you're ready to finish the rebuild.  WD=water displacing; IMO works best 
  to coat/protect metal or as a light lubricant, not as a rust remover.

  Chris
  '81 Scirocco
  Bolton, MA

  jtoomasson@yahoo.com wrote:

  >I'm going to be cracking into my stuck ABA soon and since I won't have the head on it, I was wondering if I could use any of the known "break-free"/penetrating lubes to assist loosening the pistons from the cylinder bores without harming any internals.
  >
  >My hope is to not have to rebuild the block if at all possible.
  >
  >Thanks, JT
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