So, it cranks over at a reasonable speed on the electric starter? This implies that the decompressor is working.
Because they are prone to blowing head gaskets (meaning, a minority of engines will blow one at some point in its life) I think it is useful to establish a baseline for compression pressure now, while you are satisfied with the way it is running. If the pressure is sensible (no pressure is given in the workshop manual), all is probably well. Please tell us the pressure - we need to develop our own baseline pressure for large Intek engines.
