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I'm looking to bump the timing or at least check it on the F150. I need to make the markings legible. I'm interested in seeing what you guys have done to clean this up, so it can be read with a timing light. I'm also not really interested in a temporary fix, but would like something more permanent. I've seen the stick on tape type, but don't see it lasting very long.
Personally, I, with the engine idling used a wire brush against the balancer to clean it.
Then, marked 12 degrees with a white paint marker, 14 with green, 16 with yellow and everything beyond that with red. After it dried I sprayed it with rattle can clear. Been good or years.
My balancer is not accurate, so before painting I would look up positive stop TDC to see if yours is off or not. 12 on mine is actually 10 or so.
Color coding is great because you don't have to read fine print. Green good, red bad. Ridiculously simple.
At least on my 302 I can access the balancer from underneath. I cleaned it up and painted a line at the 10° hash mark. I wouldn’t do it with the engine running. My luck it would somehow catch the brush and cause all kinds of mayhem.