I've searched and searched, my brain hurts. Quick break down, just bought the disco 2 with 170,000 on the clock a few weeks ago. So far Ive taken the intake off and replaced valve cover gaskets, new o2 sensors, plug and wires. Engine ran like crap before replacing sensors and plugs, and ran much better afterwards. The problem is when I drove it after replacing valve covers (drove it pretty hard too), the oil light started flickering and then engine started ticking, when I slowed the light went off and ticking went away. So I started preparations to add oil gauge to get readings for trouble shooting. When I had my wife start the rover so I could get readings, my connection next to oil filter started leaking, and I immediately noticed the oil was a funny color. The oil was changed just before I purchased it. It's not milky white, but like a rusty cloudy color. I haven't really driven it much since I got it, just trying to service it and get it up to par, but when I drove it home I drove the crap out of it and no lights or ticking. So, what else can I look for to see if I have a head gasket problem, if there is one. Also I had filled up coolant chamber, and it was empty today, coincidence or not? Would the oil be unmistakably milky if coolant was leaking? I'm just being overly cautious, not wanting to destroy the engine. Thanks for any help.