Resurfacing head for metal head gasket

[George Roffe]

Rick Frey wrote:

>I am trying to figure out why different gasket thicknesses change cam timing?

>Is it just some distance difference from the gear on the crank which
>drives the timing chain and the cam gears?

It's two things.  First you shorten the distance between the crank and the
cams.  Ok, that in and of itself is not an issue.  But, the tensioner only
works on one side of the chain.  So, the cams rotate towards the tensioner
when it takes up the slack.  Instant cam timing change.

George Roffe
Houston, TX
http://www.nissport.com