Thanks for that, I don't know one end of this engine from the other end yet though and doesn't seem to be a Haynes manual for it yet! Where is the temp sensor going to be? I've already had a peer round the top of the engine (and done the injector clamp bolts up a bit as they were pretty lose), the oil or diesel leak appears to be round the base of the left hand side of the big plastic manifold type thing (is that an air intake or the exhaust manifold, made of plastic??). I would attach a pic but it seems I'm not allowed to.