sacrileger
Proven Member
- 288
- 43
- Jun 26, 2016
-
Orillia,
ON_Canada
i am trying to assess the general health of this mystery 6bolt ( https://tinyurl.com/hvh4pqr ) w/o taking too many parts off and cluttering further our family garage which already looks like it was taken over by a dsm car horder.
the motor is on engine stand, spark plugs out. i am turning the crankshaft with a 1/4" drive starting w/ cyl #1 at TDC.
for a full turn of the crank, i expect considerable resistance for every 90 degree turn to compress the valve springs; and then release. the torque i get to turn the crank 90 degrees is 25 ft. lb. for about 6 turns in a row, and then i get 32 ft.lb. for the next few, and then it can fluctuate +/- 5-8 ft. lb. what's going on? does this fluctuation matter at all? i would have expected that i needed more torque to click over the cams. perhaps i should add that the balance shaft is out of sync with the oil pump.
the motor is on engine stand, spark plugs out. i am turning the crankshaft with a 1/4" drive starting w/ cyl #1 at TDC.
for a full turn of the crank, i expect considerable resistance for every 90 degree turn to compress the valve springs; and then release. the torque i get to turn the crank 90 degrees is 25 ft. lb. for about 6 turns in a row, and then i get 32 ft.lb. for the next few, and then it can fluctuate +/- 5-8 ft. lb. what's going on? does this fluctuation matter at all? i would have expected that i needed more torque to click over the cams. perhaps i should add that the balance shaft is out of sync with the oil pump.