[DeTomaso] NPC- Mustang plug problem

[SOBill at aol.com]

Larry,
 
Get a copy of the June 2011 Car Craft Magazine. On Page 56 this  exact 
problem is addressed. Ford has a TSB out which calls for the use of  
LOCK-N-STITCH anodized aluminum thread inserts and tool kit.
 
You can check out LOCK-N-Stitch at:
_http://www.locknstitch.com/sparkpluginserts.htm_ 
(http://www.locknstitch.com/sparkpluginserts.htm) 
 
The LOCK-N-STICH site also has a link to the Ford  TSB.
 
The tool kit is apparently quite expensive so it might be best to  have 
Ford do the fix.
 
The TSB covers the 5.4 and 6.8 2V motors but does not cover the 4.6  motor. 
The tool kit can be used on 4.6 and 5.4 motors.
 
Aluminum expands 2.8 times faster than steel. Some owners have  found as 
few as three threads hold their sparkplugs in the heads.  Yikes!
 
Larry: I am sending you a scan of the Car Craft article  separately. 
 
Have fun  today,

sobill at aol.com