03 disco 90K ticks when warm, good oil pressure
My 03 disco, 90k miles has a ticking noise when it is fully warmed up, mostly at idle. When started up cold there is no noises, runs strong, when completely warmed up the ticking occurs and always runs strong. I installed an oil pressure gauge in the truck instead of the light. Oil pressure idling cold 35 lbs and 45 lbs at 2000 rpm, hot idle 18 lbs and 45 lbs at 2000 rpm. I am running 20-50 weight oil. Would a cooler thermostat or an engine oil cooler help? Any direction and help would be greatly appreciated, thanks