TB42 Tappet Adjustment

[patch697]

This is a widely ask question by many DIYers so I've set it out in point form so whom ever needs it may copy & print it out for future use.


TB42 Tappet adjustment.

Adjusting Intake and Exhaust Valve Clearance
Adjustment should be made while engine is warm but not running

1. Set No. 1 cylinder at top dead centre on its compression stroke,(with timing marks aligned remove distributor cap the rotor button should be pointing at number 1 ignition lead position in reference to the distributor cap if its not rotate engine 360 degrease) and adjust valve clearances 1,2,3,6,7,10

2. Set No. 6 cylinder at top dead centre on its compression stroke, (with timing marks aligned remove distributor cap the rotor button should be pointing at number 6 ignition lead position in reference to the distributor cap if its not rotate engine 360 degrease) and adjust valve clearances 4,5,8,9,11,12

Valve clearance
Intake 1,3,5,7,9,11 - 0.38mm (0.015 in)
Exhaust 2,4,6,8,10,12 - 0.38mm (0.015 in)

Adjusting screw lock nuts - 16 - 22 Nm (1.6 - 2.2 kg/m, 12 - 16 ft/lb)

If you are running duel fuel it is a good idea to set your tappets 1 to 2 thou bigger in gap as LPG has a tendency to close up the gap.

Although this is a widely used practice its not an absolute necessity.

Cheers
Paul