1998 Chevy Astro 6 cyl Two Wheel Drive Automatic 176200 miles
I replaced valve lifters due to hard clattering (found
one lifter with broken inner piston broken retainer spring) none the less I replaced all I set initial timing with top dead center mark on chain cover, piston #1 in compression stateall the way up and valves closed.(By #1 piston I mean front piston on driver side or right banklooking at engingr from outside.)It has been about 7 months now and scan tool reads about 18 degrees timing on idle. Right from start up. I recently learned tha #1 piston is o passenger side. Front piston. Here is the question: Can you give me the correct procedure to set timing?