Cam chain tension

[Guest]

I noticed elsewhere that someone mentioned "resetting chain tensioner":
My manual(Haynes) doesn't cover that re: to cam chain...just says it's automatic. Do I need to be servicing this? I'll admit that I never have
Hugh

[Billy Ricks]

It is automatic but it doesn't hurt to service it once in awhile.

Here's how to service the tensioner.

With the tensioner removed from the cylinder block loosen the lock nut on the left side of the tensioner and back the slotted bolt out ? turn. Turn the knob on the right side of the tensioner, which in the Suzuki service manual is called a lock shaft handle, counterclock-wise. As you are turning the knob counterclock-wise push the pushrod all the way back. Keep turning the knob until it refuses to turn any further.

With the pushrod still pushed in as far as it will go tighten the slotted bolt so that the pushrod will not plunge out.

Remount the tensioner to the cylinder block. If the tensioner is not going in turn the crankshaft clockwise slowly to get slack in the cam chain on the intake side of the block.

Loosen the slotted bolt ? turn allowing the pushrod to advance towards the cam chain. Tighten the lock nut but leave the slotted bolt loose by that ? turn.

While turning the knob counterclock-wise, slowly rotate the crankshaft in reverse direction, counterclock-wise. This causes the chain to push the pushrod back.

Release the knob and slowly turn the crankshaft in the normal direction, clockwise. You should see the knob rotate as the chain becomes progressively tighter. If it does the pushrod is obviously moving forward under spring pressure signifying the tensioner is in good operable condition. If it moves sluggishly or not at all that means the pushrod or the slotted bolt is sticking. If so remove the tensioner from the block again and inspect the pushrod. It could need cleaning or could be bent or galled. Further crank rotation will take the slack out of the cam chain.

[hp1000s]

Thanks, Billy....nice clear reply! I knew that with all that knob/spring/lock nut stuff, there just had to be more to it.
Thanks again,
Hugh

[bwringer]

I have plenty of hot naked stripped cam chain tensioner pics here, in case you're curious:

http://bwringer.com/gs/camchaintens.html

[hp1000s]

Too cool....
Thanks-a-million!
Hugh