its a h plate stu ... i have checked the 3 plug connectors that go over the back of the cam cover ... all look ok (did look proper like not just glance) ermmmm it does spit a bit of water out of the header tank on a session so the h/gasket is getting changed for a group a one before n/d ..

where can i look for this "wiring harness plug" or is that the same as the 3 plug thing???

thanks for the reply stu