The thermostat housing is dome shaped at the end of the radiator top hose on the block, and should be near the water pump which is on the front of the engine. Not looked at a Montana lay out so can't help further.. :)
It is underneath the throttle body underneath the intake manifold. The throttle body and air flow sensor will have to be removed or set aside in order to get to the two bolts on thermostat housing.
1996 3.1 litre ThermostatThe thermostat on a 3.1 litre is located under the throttle body where it connects to the intake manifold. I found it was easier to remove the throttle body when replacing the thermostat. You first have to remove the throttle cable bracket that is mounted on the throttle body. After that you will be able to see the thermostat housing. The bottom hole on the thermostat housing is slotted so you don't have to completely have to remove it. Good luck!
the thermostat is located right in between and beneath the throttle body/ intake manifold. you will see the radiator hose that is right in this location, where it meets the engine, the thermostat is right there. you have to disconnect the hose obviously to gain access to it.
don't remove the throttle body. just the exhaust pipe, the air inlet tube and the heat shield.
It is located underneath the throttle cable assembly, behind the exhaust manifold. It is no shade tree mechanic job to replace this.
it's on the intake manifold tucked in between the engine block and manifold itself, immediately to the left of the throttle body looking from the front of the car. It's a dog to get it's retaining bolts out without removing the manifold but can be done.
ON MY 3.4L ENGINE IT ON THE DRIVERS SIDE RIGHT BELOW THE THROTTLE BODY BEHIND THE EXHAUST MANIFOLD. JUST FOLLOW THE LARGE HOSE THAT COMES FROM THE DRIVERS SIDE OF THE RADIATOR. IT WILL CONNECT TO THE FITTING THAT COVERS THE THERMOSTAT.
Throttle plate stuck - bound up Manifold tightened unevenly? Throttle plate stuck - bound up Manifold tightened unevenly? Control
Inside of the thermostat housing, which is just beneath and to the driver's side of the throttle body. It is a 90* elbow protruding from the top of the engine with a radiator hose attached to the end of it.In order to replace it, you'll first need to remove the intake manifold, air intake assembly, and throttle body.
Thermostat is located on the transmission end of the intake manifold (left hand side) It is held with 3 bolts that are not easy to get to.(along with the thermostat itself) You will need to remove the black plastic tubing that runs from the air filter to the throttle body. Good luck!
On the 2000 models with the 3400 engine in it you must first remove the throttle body. Removing the throttle body makes access to the thermostat housing very easy. Simply take 2 bolts out of the housing and remove the thermostat. After replacing thermostat you must bleed the air out of the system because it is pressurized. Not bleeding out the air can cause severe engine damage if allowed to run. overheatin of the engine is the first sign.
in the thermostat gousing under the throttle body