SOHC (and LS DOHC) Camshaft Bevel Shim - Set of 4 Shims

Essential when rebuilding your SOHC engine to ensure that the upper vertical bevel gear has the correct backlash and position in relation to the camshaft bevel gear, these camshaft bevel shims fit between the camshaft (the rear of the shoulder that holds the large bevel gear) and the front cambox bearing (i.e. in the front cambox well).

Fitted in conjunction with the upper vertical bevel gear shim, the ideal positioning is acheved when the gears are in line and there is a just perceptible gap (backlash) between teeth (and see our listings for lower bevel gear shims for more information on the full Vertical Bevel Gear shimming process).

This listing is for a set of 4 shims (one of each available thickness), and fractionally cheaper when bought this way:

Shims are available in the following thickness:

- 0.1mm = 0.004" or 4 thou

- 0.2mm = 0.008" or 8 thou

- 0.3mm = 0,012" or 12 thou

- 0.5mm = 0.021" or 21 thou

It is common practice to measure initially with no shims fitted, then add one or multiple shims to reach the desired final positive backlash, measuring each time shims are added or subtracted  

Note - the final photograph shows the camshaft aseembly as removed from a pre-war racing cambox I overhauled - that had not been stripped for at least 50 or 60 years (as can be seen from the 'treaclly' Castrol R it was still smothered in - and you can see it was fitted with a number of original shims identical to our own.