Re: thermostat not opening? Even with new one?
You haven't asked but I will suggest this anyways. Unless you are totally broke and have no other choice I would not use any of the radiator leak repair additives. they will eventually gum stuff up. You don't want to have to replace the heater core . it is a 8 hour hard project. You have the 5 speed so no tranny lines to the raditor. the radiator swap would be a 30 minute project
2004 Ext Cab, 4WD, 4.0, Auto, 146k. (4.0 engine is out of a 2009 Ranger w/96k) ( as of 3/10/2016)
2004 Ranger, Ext Cab, 2WD, 3.0, 5 speed , 4WABS, crank windows, no cruise, Edge 116k.(6/5,2014) (SOLD).
1999 Ford Ranger, Reg Cab, 2.5, 5 speed, 2WD, no AC, 150k (SOLD).