- Joined
- Oct 24, 2012
- Messages
- 4,592
- Age
- 35
- City
- Lafayette
- State - Country
- TN - USA
- Vehicle Year
- 1988
- Vehicle
- Ford Ranger
- Drive
- 4WD
- Engine
- 4.0 V6
- Transmission
- Manual
- Tire Size
- 245-70-R16
94 4.0. So the only flow when the thermostat is closed is through the heater core on these. Possible a nearly clogged heater core? I'd try just looping the heater hoses and going for a drive to see if it changes anything. Costs almost nothing. Just need a 5/8 double hose barb.