MNorton
Newbie
Just an update, I replaced the thermostat three times and burped the air out each time. It stil kept fluctuating. I put a vacuum tester on the cooling system system and it would not hold a vacuum. I finally found it was dripping water out the lower weep hole on the water pump. After replacing the water pump it would hold the vacuum properly. I guess it was getting air in the system thru the weep hole maybe, anyway after replacing the water pump the temp is rock solid even though a bit lower than it should be with the 180 thermostat. Maybe because I drilled one hole in it.