Originally Posted by FOG
I always removed the sprockets from the cams out of the engine to elongate the holes. I suppose you could do it in the engine if you had to. Yes you will certainly need to remove the CCT in order to get slack in the chain to remove the sprockets, or the cams.
FOG, I agree about elongating holes, you have to remove sprockets, and CCT before that. But what about when you already have them elongated and back in place? I ll describe: When I did measurement with degree wheel and dial gauge, and was not 100/105 degrees, I loosened cam sprocket bolts and removed CCT, then reposition sprockets, tightened bolts, put back CCT, and repeated measurement. I tried with CCT in place but sprockets didnt move (with bolts loose).
One more (important) thing: Since this was my first time in degreeing cams, I (probably) did some beginner mistakes. I positioned dial gauge, made masurement, then removed dial gauge from frame, repositioned cam sprockets, put dial gauge back, remeasured on degree wheel. Only later did I positioned dial gauge in such a way (like you did) that I did not have to remount it while readjusting cam sprockets.
During cam degreeing I made some interesting observations. Your opinion on this will be very helpful.
Ok, as mentioned before, I elongated holes in both directions like this 2mm C(enter) 3mm.
Then I measured intake cam lobe. First tried with one extreme positions (2mm from C in one direction) and I got 105,5 degrees. Then I tried opposite direction (3mm from C) and I got 102 degree. Original value must have been between ... since now I repositioned sprockets 3mm from original position. This is still not good as factory value should be 100. But its hard to belive that 3mm (almost 1/8") is not enough.
I measured position of lobe like you discribed. Found proper TDC, set degree wheel to 0, then put dial gauge vertical to valves, turned around degree wheel for one revolution, then started with 0 TDC and measured till gauge index was back on original value. Interesing was that if I tried this procedure for example with different positions on degree wheel (when starting to measure valve movement) I got different readings (+/- 1 degree).
Ok, exhaust lobe was in one position 104 degres, in another 110. Readjusted and got 104,5 which will suffice for now.