yes a leak in the pressure system even if above the water line will cause warm temps. is that enough to cause your problem? no way to know. but fix the leak and see if the problem is solved.

on the oil pressure, it will always be less when the motor warms up. the parts expand and make more room for the oil to circulate hence the pressure drops.

if you have good oil it will usually peg it at ldle when cold. after it warms up it will drop. a good engine will have 1.5 bars. minimum is .5 at warm idle on a warm engine, i believe.

tom w

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.