Hi, Just wondering what the standard gauge oil pressure gauge should read when car is at idle on a big turbo escort, was out for a wee run tonight and when i stopped at lights the gauge would drop down to just above the red, though not in the red, i came home straight away and checked the oil level, which was fine, right on the top mark, i had the oil and filter changed about 2 months ago but have done less than 100mile in that time. The oil is Mobil1.

Ohh and another question, when i was checking the oil i could hear a slight hiss coming from the header tank cap, i unscrewed it slightly and could hear lots of air noise from the hoses, i let it de-pressurise then unscrewed the cap i noticed the water level was very high, does this sound like an air lock??? As it happens, i had to remove the swirl pot the other dayas i was fitting my new cambelt cover, when i put everything back together i started the engine with the header cap off, i noticed that water was pumping into the header tank from the top hose, the one from the top of the swirl pot??? is this normal?? or have i simply put to much water in it??

Many thanks, Lee