So about a month ago I noticed my coolant temps started to go higher than what it usually would settle at, which was 197. It would heat up very very fast all the way up to 210 while cruising, but after lifting off the temps would go down just as fast. Eventually i found out the LH heater core hose went bad and i was leaking coolant pretty badly. I ended up fixing it and i refilled my coolant and I thought that was that, but the temps still rise pretty fast. Its not as bad as before but it definitely does not stay stable still. Does anyone have any idea what could be causing this?