[Kurt in NJ]

I mark crankshaft pulley, on level ground, put in 3rd with valve stem up on tire, roll car forward till valve stem up again while counting revolutions, --- 3-3/4 about= 3:78
4 plus a little = 4:11, 3-1/2 =3:54 , usually I grab front wheel to move car so I can watch pulley, and feel position of valve stem