73dartneedswork
Well-Known Member
How do I find where to put the timing mark on my harmonic balancer?
Thanks,
Kris
Thanks,
Kris
, or as close as the stretch on your chain allows...
....The stretch of the chain has nothing to do with it....
Get yourself a spark plug and knock out the electrode. Jam a 2" long bolt in there and cinch it down so it cant come out. Get the #1 cylinder started on the compression stroke and put it in the #1 cylinder.Rotate your motor by hand until the piston touches the stop, er..bolt. Mark the damper and then rotate it backwards until the damper hits the stop again, mark it and then [bisect the 2 lines on the damper]. Thats your TDC
My bad, you are absolutely right. I was thinking cam timing. If you got mass amounts of slop in your chain, the crank can move 2-3 degrees before the chain tightens up on the backstroke. Thats why you move the crank in the operating direction and if you over shoot the mark, you back it past the correction a few degrees and run up to the mark again in the operating direction. If you have a chain tensioner or a single idler gear, this isnt necessasy, but a sloppy chain will fool you if you just backpedal to correct and leave it at that. This applies to distributor timing and cam timing.
Get yourself a spark plug and knock out the electrode. Jam a 2" long bolt in there and cinch it down so it cant come out. Get the #1 cylinder started on the compression stroke and put it in the #1 cylinder.Rotate your motor by hand until the piston touches the stop, er..bolt. Mark the damper and then rotate it backwards until the damper hits the stop again, mark it and then bisect the 2 lines on the damper. Thats your TDC, or as close as the stretch on your chain allows...
OK this explains how to find the TDC when the motor has some miles on it.... would this be necessary on a new build with a fresh chain?
or could you just run it up on the c stroke until the piston stops moving up.....I seem to remember using a longer thin screwdriver and watch it move up and up then it would just stop moving and the mark would be on zero or really close to it..... seem reasonable?
My fluidampr doesnt move.I can put the damper on 0 and the piston is tdc. One of the plus,s of a quality damper.