Hi Tom, This is the way I adjusted the valves on my 270. Racecarl from here on the page turned me on to this method. It saves a lot of engine turning and time. You will have to do the valves cold the first time .. After you get it running then do them again hot..Doing it this way , the whole job should take you 10 minutes..
Remove the valve cover and find Top Dead Center # 1. To do this crank the engine slowly by hand. Keep your eye on the # 1 intake valve ( second from the front ). When the intake valve starts to close ( rise up ) , continue to crank slowly while watching the flywheel timing peephole. When the correct timing mark aligns with the pointer, ( between the U and the C for the 228, 248 or the ball for the 270 ) you are at # 1 TDC..
Use a feeler gauge set at .012 for the intakes and .020 for the exhaust valves. I usually use two different feeler gauges to make it easier. Slide the gauge in and adjust the clearance between the rocker and the top of the valve . Use a 5/8 wrench and a flathead screwdriver on the side of the rocker above the pushrod. Do this in the following order.. First do
# 1 Intake & Exhaust
# 2 Intake
# 3 Exhaust
# 4 Intake
# 5 Exhaust
Spin the motor over by hand one revolution, the engine is now at # 6 TDC
Adjust
# 6 Intake & Exhaust
# 5 Intake
# 4 Exhaust
# 3 Intake
# 2 Exhaust
Another way to remember the order is on # 1 TDC start from the front and do the first three, skip one, do one, skip one, do one, skip one, do one. Then spin to # 6 TDC and start from the back and do the same thing, first three, skip one, etc..
