Thanks for the clarification. I also use anti-seize on my exhaust bolts. evilscientistboo@xxxxxxxxxxxxx wrote: Heads are aluminum. You have differerent rates of expansion vs a steel plug. Neverseize doesn't protect from electrolysis but does allow the threads not to bind which eventually leads to a stripped hole. Sent via BlackBerry from T-Mobile -----Original Message----- From: Mark Sawyer Date: Mon, 5 Feb 2007 12:22:43 To:tcb@xxxxxxxxxxxxx Subject: [tcb] Re: Need some work on the bus. Because on Spark plugs your putting a non-compatible metal into a magnesium thread. electrolysis sets up and could weld the plug in the head. j duncan wrote: Just curious: why do you recommend anti-seize for a basic tune-up? _________________________________________________________________ Search for grocery stores. Find gratitude. Turn a simple search into something more. http://click4thecause.live.com/search/charity/default.aspx?source=hmemtagline_gratitude&FORM=WLMTAG