Cam and Pinion Timing Marks?
#1
07-02-2014, 06:26 PM
Cam and Pinion Timing Marks?
Last time I had an EVO...I gave the guy the service manual and he is suppose to be brining it back.....but somebody help me sleep at night until he does....please!
I made a decision to proceed to rebuild my top end on a 1998 FLHRCI. All I had planned to do was replace the cam bearing as insurance, but decided to yank off the top end for a re-build as my compression readings were just at the low-end of the curve...like 95-psi. Anyway...I line up the marks on the cam and pinion gear as well as index the breather gear and removed the cam and lifters. In the process of my bumping things around to remove the jugs...naturally, I rotated the pinion a bit and I don't know which way. We all know that the pinion is smaller than the cam and will make more revolutions per cam revolution.
I have to rotate the pinion back to bring the index mark back to 12 o-clock. How can I make sure I have the cam and pinion gear marks lined up properly for mechanical timing and not out of phase. Is it as simple as making sure #1 is at TDC on the compression stroke? Or both #1 lifters are collapsed?
Somebody please help an old man that has brain cells dying by the day and it's been 15-years since I've been into one. If I had just went ahead and changed the inner bearing first and buttoned that up...I would not have this problem, but I chose to do too many things at once....admittedly. I have the jugs out for an over-bore, so all I am looking at in the top-end is the rod ends.
Help....and you can laugh if you want to.
I made a decision to proceed to rebuild my top end on a 1998 FLHRCI. All I had planned to do was replace the cam bearing as insurance, but decided to yank off the top end for a re-build as my compression readings were just at the low-end of the curve...like 95-psi. Anyway...I line up the marks on the cam and pinion gear as well as index the breather gear and removed the cam and lifters. In the process of my bumping things around to remove the jugs...naturally, I rotated the pinion a bit and I don't know which way. We all know that the pinion is smaller than the cam and will make more revolutions per cam revolution.
I have to rotate the pinion back to bring the index mark back to 12 o-clock. How can I make sure I have the cam and pinion gear marks lined up properly for mechanical timing and not out of phase. Is it as simple as making sure #1 is at TDC on the compression stroke? Or both #1 lifters are collapsed?
Somebody please help an old man that has brain cells dying by the day and it's been 15-years since I've been into one. If I had just went ahead and changed the inner bearing first and buttoned that up...I would not have this problem, but I chose to do too many things at once....admittedly. I have the jugs out for an over-bore, so all I am looking at in the top-end is the rod ends.
Help....and you can laugh if you want to.
#2
07-02-2014, 07:00 PM
#3
07-03-2014, 06:26 AM
#4
07-03-2014, 06:38 AM
Thanks nh. Maybe by the time I get this re-build done....I will have remembered all this stuff. BUT....I hope this is my last go 'round.
Laying awake at night considering all the gear rotation is not something an old-timer needs to do.....he needs to be sleeping. It finally hit me a while after I started this thread. The crank doesn't care where it is at this point as long as you have the pinion, cam and breather gears all lined-up.
Input greatly appreciated.
Laying awake at night considering all the gear rotation is not something an old-timer needs to do.....he needs to be sleeping. It finally hit me a while after I started this thread. The crank doesn't care where it is at this point as long as you have the pinion, cam and breather gears all lined-up.
Input greatly appreciated.
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