What should the timing be on a Burton power camshaft?
Now rotate the crank clockwise until the inlet valve of number one cylinder is just off full lift position (such as 0.005” or 0.15mm). Record the figure on the timing disc from the pointer. Then continue to rotate the crank clockwise until the valve has fully opened and then closed by the same distance as previously used (0.005” or 0.15mm).
What’s the best way to set the cam timing?
Rotate crank until the rockers on cylinder one are holding both valves open a little. This is the overlap period and how you are going to set the cam timing. Look at the pointer and pulley. Rotate crank to set them so they are directly opposite each other.
Do you have to change the timing gears on a cam?
After each adjustment of the timing gears, you need to go back and repeat steps 4,5 and 6 as altering the cam timing will alter the big gaps between rocker and valve tip. This method initially restricts timing to the manufacturers recommendations.
Where do you put the timing disc on a camshaft?
It is always recommended to calculate the actual position of TDC rather than rely on the mark on the crank pulley. Fit the timing disc to the front of the crankshaft. A pointer for the timing disc can be made from a piece of bent wire secured under a suitable front cover bolt. Position a dial gauge to measure the travel of No 1 piston (see right).
What do you need to know about replacing a camshaft?
Where a camshaft is being replaced due to excessive wear, it would be highly recommended to strip the engine and fully clean the internals. Metal particles present in the sump, oil pump, bearings and oil galleries will soon play havoc with the new cam. It would also be wise to check the oil feed system.
Where is the piston crown located on a Burton camshaft?
Access to the piston crown is made through the spark plug hole. Rotate the crankshaft clockwise to 90 degrees after TDC. This will make sure all the pistons are half way down the bore. Now position the dial gauge so that it can read the lift of the inlet valve of number 1 cylinder from the top of the valve retainer (see left).