Dan,

I believe the body goes in, then the plunger set on the first click. That is where I set mine. The whole point of the ratchet design is to prevent the chain from becoming loose w/o oil pressure.

If it is not set at the first click, what prevents the chain from slapping around on the initial start up?

Be prepared for a bit of a fight trying to get the plunger started in the body of the tensioner, especially if you replaced the chain and rails ;(.

Tinker