1995 Buick Regal coolant

Hi there, have the system pressure tested, there may be a small leak that is only evident under pressure, it also may be I a position that is only evident on a hoist. Have the coolant check for exhaust gasses, this is a simple chemical test that will show if a head gasket problem may be your trouble, Is there any excessive white smoke, or an unexpected miss fire, rough idle. This would also indicate a head problem>

Mark (mhpautos)