Originally Posted by Stretch

The procedure is this

You turn the crank until the cam lobe on the intake valve (2nd one in!) over #1 cylinder is pointing upwards

This means two things

a) the valve is closed
b) you are close to the TDC before the intake stroke

The clearance between the rocker arm and the cap on the valve stem needs to be removed. So you set the valve clearance to zero - if you like no feeler gauge fits.

You now set up your DTI (clock gauge) by putting the probe on the valve spring retainer

You push the DTI downwards so that you have a 3mm pre-load.

You need this pre-load because although this method is called the 2mm "lift" method - the valve will drop downwards into the cylinder {but the valve "lifts" from the valve seat}

If you don't have any pre-load, the needle on the DTI stays in the same position

With the 3mm pre-load set you continue to rotate the crank in its normal direction of rotation until the DTI shows a drop of 2mm - so it will be reading 1mm

This is the point at which you read off the graduations at the crank


############


Please note this is NOT the elongation


############



You now have to find the camshaft code on the back of the camshaft (near to cylinder #5) and compare the measurement you have made with the data in the FSM