Engine Mechanical problem
1997 Ford Ranger 6 cyl Four Wheel Drive Manual
Do you have to drain the coolant to change the thermostat?
Thursday, November 20th, 2008 AT 5:50 PM
1 Reply
DAVE H
MECHANIC
13,383 POSTS
You do not have to drain the whole system to change thermostat. Take off the pipes going to thermostat housing obviously you will lose coolant. Take off housing . Replace thermostat. Replace housing. Refill system. And bleed system. Let the engine get hot enough for thermostat to open.