Got a problem with oil leaking from the rear of the left hand cykinder head on my 2.6 V6 80 Coupe. Where the electrical plug is located on what appears to be the end of the camshaft {rev counter pick-up?} there is oil dripping down onto the lamda sensor on the exhaust manifold. Does anyone know if the seal is replaceable from the outside or is it a strip down job? I realise because of its location that it will be awkward but i dont want to start stripping it thinking i will only be doing an hours work to find out i need to strip the head to do it. Any info would be greatly appreciated!