If it has a petrol engine then yes, it will have four spark plugs.
3 - one for each cylinder
The spark plug gap is 09.96 The spark plug gap is 09.96
web search suggests 1.0mm
right tyre size for p reg corsa
take off the plastic cover on the top centre of your engine then the screws on the ignition pack and disconnect the wire, lift out and all the way down are the little plugs
Mine 53 reg Corsa SXI has a timing chain if that helps?
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chain
These days most, if not all, spark plugs come pre-set. If you get the right ones there is no need to check the gap, you just fit them.
wher the big water pipe goes to