I recently found this forum and have a question concerning the cam gear on a 425.
I replaced the plastic gear on my 1994 425 with 1077hrs as it needed the cover gasket replaced. I replaced the cam shaft , water pump , tappets. Adjusted valve clearance to .010.
I didn't change out the valve springs as I didn't think it would be a problem using original springs.
It now runs with a slight hiccup at any engine speed. Should I have replaced the springs with new ones designed for the steel gear as I believe it is a valve train issue?
Also, it ran very quiet with the plastic cam gear and now it has a tinging metallic sound coming from the cam area. I'm hoping this is normal with the metal gear.