to adjust tappet clearance the easiest way is to do it when on the back of the
cam and then you just go through the firing order one cylinder after the other
and adjust both intake and exhaust valves at same time on each cylinder .
if you get each cyl one after the other on the firing stroke , ie when NONE
OF THE PAIR OF VALVES ARE ROCKING , then you can adjust both valves on that
cylinder and then all you need is to go to next cylinder in the firing order
and adjust that pair of valves and so forth .
its so easy , if the valves are rocking then you have to turn the engine over
until both valves are back up and slack and neither of them rock when you
turn engine over for a bit after.
this then places the valves on the back of the cam where there is clearance
for the valves to remain shut so the engine can fire .
you only need to look at tdc mark on the harmonic damper on the crankshaft [
if it has one ] to determine the top dead centre position and then if the
valves are rocking at this point just rotate the engine over until you are at
the point where the valves dont rock .
you might think this sounds difficult but if you turn the engine over slowly a
few times whilst watching the rocker arms moving youll see the 2 things i
mean and can determine easily which stroke you are on and when to adjust the
tappets .
the beauty of this way of doing it is that you can go through progressive
cylinders and adjust them according to the the firing order and adjust each
cylinder completely each time .
you can just start at any cylinder and go through them all one at a time , or
pick out any one cylinder to do although this way will require you rotating
the crank a fair few times
).
