OK. Here we go, my '89 Oldschool Rolla-wagon has an issue. I know it needs a thermostat for a fact because the Temp gauge never reaches Normal Temp. It usually is between normal and Cold. I need a new rad too if it matters. Also I live down a twisty road, and I find when I go around the corners, Cold air blows through the vents instead of warm air. When I straighten out on the road, the warm air begins to come back. I'm a rookie when it comes to this stuff cause I've never experienced this before. Let me know whats you think it is! Thanks