Solid cam damage diagnosis help
Straddle the lobe like this....... roll the cam back and forth to get the smallest reading.
Have the caliper way towards the front or rear of the lobe.
Get your smallest reading, then go to the opposite end(front or rear)of that same lobe...... take another smallest reading.
There “should” be .0015-.0020 difference.
From the pics...... if the cam is the real cause of the odd wear pattern..... I’d be expecting to see it be more like .0030+ taper.
I’d also see if you can determine if all the lobes are tapered in the same direction.
By the looks of your cam, they all “appear” to be tapered so they are bigger at the rear of the lobes.
Only 1/2 the lobes should be that way.
Straddle the lobe like this....... roll the cam back and forth to get the smallest reading.
Have the caliper way towards the front or rear of the lobe.
Get your smallest reading, then go to the opposite end(front or rear)of that same lobe...... take another smallest reading.
There “should” be .0015-.0020 difference.
From the pics...... if the cam is the real cause of the odd wear pattern..... I’d be expecting to see it be more like .0030+ taper.
I’d also see if you can determine if all the lobes are tapered in the same direction.
By the looks of your cam, they all “appear” to be tapered so they are bigger at the rear of the lobes.
Only 1/2 the lobes should be that way.
