Here are a couple of poor pictures of the most commonly used AC Delco R45 plugs
being use in the AD trucks now days. Second one shows the reach of the R45 plug and
as you can clearly see, you’ve got a long way to go to reach the piston:
http://www.pbase.com/dennygraham/image/136038165
http://www.pbase.com/dennygraham/image/136038174

Here it is with a long reach plug installed. I would think that you would have one
'ell of a time getting that plug out with the threads loaded up with deposits, which is inevitable:
http://www.pbase.com/dennygraham/image/136038755
Denny Graham
Sandwich, IL


Last edited by Denny Graham; 07/01/2011 2:14 PM.

Denny G
Sandwich, IL