According to the service schedule, the valve clearances on the 1.9 120bhp 8v engine (NOT the 150bhp 16v) need checking every 40k/4 years.
From what I can gather the 150 16v uses hydraulic lifters, so is self-adjusting, but the 120 8v uses shims. Anyone ever adjusted them on a 8v?
The actual procedure seems easy - point cams upwards and check clearances, but Vauxhall seem to specify two special tools when doing this job EN-46797 and EN-46799 which presumably help you to comress and then hold the valve down, so you can take the old shim out (if necc). anyone know what these tools are or look like?