Hi, not quite sure what you are trying to do but you would normally time the engine from the other end Cam Belt end. There is a tooth on the crank pulley at that end which aligns to a mark on the plastic engine cover and similarly at the top a mark on the cam sprocket which aligns to the plastic cam cover.
If you have the top cam cover off there are also marks on the two cam sprockets
None of these marks actually relate to TDC though
If you want to find TDC proper then a dial gauge down No1 injector hole is your best bet
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