174/177 supercharged small block, where to start?
Try tightening the “spring tension nut” all the way, bottoming out the spring. Part on left, in pic.
Then unbolt the “tensioner” from the “tensioner bracket” (part on the right in the pic) and then reassemble with the tensioner as tight as you can manage using the “multiple adjusting/positioning holes. I sort of get the tensioner on a 45* angle (8:00 position) at first, installing only one of the Allen Head Screws (the one on the right (DS) first.
Then pull the tensioner up (the single bolt will give you some leverage) forcing pressure on the belt. Install the second Allen Head Screw. Tighten both up.
Loosen the “spring tension nut”, backing that all the way out. Double nut it at the end or (if your threaded shaft has a hole in it, install a cotter pin and back the nut out, until it rests right up against the cotter pin).
This should give you maximum spring pressure against the belt. Let her run for a bit and check to see that there should be at least 1/4” of “free play” on the tensioner (kinda contradicts the above instructions) but if the belt is new, it’ll stretch out a little bit at first.
You can take apart the tensioner and add a few washers to increase the spring tension too.
I’m assuming your pulleys are running true and wobble free.
Then unbolt the “tensioner” from the “tensioner bracket” (part on the right in the pic) and then reassemble with the tensioner as tight as you can manage using the “multiple adjusting/positioning holes. I sort of get the tensioner on a 45* angle (8:00 position) at first, installing only one of the Allen Head Screws (the one on the right (DS) first.
Then pull the tensioner up (the single bolt will give you some leverage) forcing pressure on the belt. Install the second Allen Head Screw. Tighten both up.
Loosen the “spring tension nut”, backing that all the way out. Double nut it at the end or (if your threaded shaft has a hole in it, install a cotter pin and back the nut out, until it rests right up against the cotter pin).
This should give you maximum spring pressure against the belt. Let her run for a bit and check to see that there should be at least 1/4” of “free play” on the tensioner (kinda contradicts the above instructions) but if the belt is new, it’ll stretch out a little bit at first.
You can take apart the tensioner and add a few washers to increase the spring tension too.
I’m assuming your pulleys are running true and wobble free.