Hey thanks for your reply, It takes about 5 to 10 miles at 55mph to bury the thermostat needle. I have replaced the temp. sensor and coolant temp sending unit. also checked the hoses and flushed the radiator. i bought this car from some moron lady that let it sit for 3 years! I've been keeping an eye on the coolant level and i top it off regularly so yeah i guess its loosing coolant. sorry for my limited knowledge at the moment but i am learning =)
