vehicle maintenance should be a number one concern for all motorist at any time of the year,whether its basic liquid/fluid changes or brakes,tires,exhaust,electrical,chassis components,etc.when a vehicle is on the road and in a non safe condition,it then becomes an accident waiting to happen
this is why i am in favor of FREQUENT oil change intervals.it gives a chance to hopefully spot a potential problem while looking the vehicle over,and yes, trying to find something wrong....hey jd you might want to see if your vehicle has the tiny(2) block drain plugs(not freeze plugs) when changing out your coolant. its probably the lowest point for better drainage. nice to see you are very thorough in your coolant change.