Camshaft Positioning
Posted: Mon Nov 19, 2018 7:15 pm
I am looking at my camshafts after taking the cover off to check the valve clearances. I have Burton power camshaft sprockets fitted which have both IN and EX engraved on them, so they are interchangeable. I set the cam position last time up to get the mid point of the letters to indicate the timing mark.
Now looking at them again I can see a faint line next to the EX and a faint dot next to the IN. I then looked at the Burton power website and these marks are quite clear on their photo of the sprocket.
So I have been running with the inlet camshaft too far clockwise (as viewed from the front) by nearly a tooth.
A couple of questions:
1. The rear inlet and exhaust cam lobes are not quite in mirror postions at TDC - probably because of the timing mark confusion. Should they normally look exactly the same when the timing is reasonably right?
2. What effect would the inlet cam being a tooth out have on engine running?
Dave Chapman.
Now looking at them again I can see a faint line next to the EX and a faint dot next to the IN. I then looked at the Burton power website and these marks are quite clear on their photo of the sprocket.
So I have been running with the inlet camshaft too far clockwise (as viewed from the front) by nearly a tooth.
A couple of questions:
1. The rear inlet and exhaust cam lobes are not quite in mirror postions at TDC - probably because of the timing mark confusion. Should they normally look exactly the same when the timing is reasonably right?
2. What effect would the inlet cam being a tooth out have on engine running?
Dave Chapman.