Surely the 1.2 is the Yamaha designed engine-therefore mechanical tappets not hydraulic! Get yourself a Haynes.Don't think there is one specifically for this MY. but the earlier one is the same engine.
jc2 is correct. As far as I am aware all Fords from approx 1996 with either the Ford Zetec 1.8 & 2.0 (Mk 1.5 Mondeo, Mk 1 Focus), Ford/Mazda Duratec 1.8 & 2.0 (Mk 2, 3 4 Mondeo, Mk 2 Focus) plus the Yamaha Zetec 1.2, 1.4 & 1.6 used in the Fiesta & Focus (there are probably more than I have recalled) are all solid tappets. the early Ford Zetec (1.6, 1.8 & 2.0) used in the Fiesta, Escort/Orion, Mk 1 Mondeo used Hydraulic tappets.
We had a Mk 1 Focus followed by a Mk 2 Focus (both 1.8 petrol) and I seem to remember that the check/adjust was every 40,000 miles. No idea if ours were ever done (part of service) but I never needed to ask specifically since even though both cars did six figure miles the tappets never made a murmur.
The OP does not say how many miles the car had done but it is important for these modern cars to have regular oil changes with the correct Ford spec lubricant. Its not expensive, the last time I bought 5 litres (2019) it was £16 from Asda.
If I remember correctly there is a Ford tool that enables the shims to be removed and replaced without dismantling the cam assembly but you need a selection of shims at hand should a different thickness be required plus a set of feeler gauges (cheap enough) to check the clearance and a vernier (not so cheap) to measure the shim thickness. Its probably easier to get a Ford specialist who has the shims at hand to do it especially for a DIY'er with no previous experience.
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