Valve Adjusting Screws and Nuts - 10mm x 1.0, Valve adj nut

This screw rides against your valve, opening and closing it. These screws do wear out, so check the end that rides on the valve. If you see any pits in the adjusting screw, you will need to replace it. We're not big fans of the stock adjusting screws and feel you are much better off with swivel feet adjusting screws. You'll find SWIVEL FEET ADJUSTERS in the aftermarket section. Also take a look at the jam nuts. If the corners of a nut are rounded off, replace it; it'll save your knuckles. When you tighten the nuts, remember that snug is fine; you don't have to gorilla them tight. To adjust your valves; pop the cap off your distributor, turn your motor over by hand until the rotor lines up with the #1 wire. You should see a small line on the distributor body and the crank pulley notch should line up with the split in the case. Take off the valve cover on the #1 - #2 side (passenger's side). Adjust #1 intake and exhaust to .006". If you are not sure on your feel with the gauge, try and slide a .007" gauge in. If the .007" gauge fits, you're too loose. With #1 done, rotate the motor by hand counterclockwise 180 degrees and adjust #2 intake and exhaust. Clean your valve cover and install a new gasket. Put that cover back on. Now pop off the #3 - #4 valve cover. Rotate the motor again counterclockwise 180 degrees and adjust #3. Rotate motor again counterclockwise 180 degrees and do #4. Put a new gasket in the valve cover and pop it back on. Put your cap back on the distributor and you are done.

Bus (Type 2): 1800-2000