Lower section of upper radiator hose seperated from filler cap ho

check, temperature of upper radiator hose vs. lower radiator hose, also if there are any cold spots in radiator usaully indicates bad thermostat. all hoses and surface of radiator should be hot in order to keep engine cool

Hello. Here a non-photo diagram. Hope this helps!!!

The thermostat is located on the side of the water pump, the water pump is located just above the a/c compressor, the thermostat is fed coolant from the radiators lower radiator hose.
Thermostat :
1. drain coolant and tighten drain plug ( easier method : remove radiator cap, get big drain pan, place drain pan under lower radiator hose to radiator connection, remove clamp, slowly remove hose, allow coolant to drain into pan, now is a good time to remove radiator hose and clamp from thermostat housing )
2. remove thermostat cover / cap ( easiest to get at this when front of car is supported by jack stands and right hand side lower cover is removed ).
3. thermostat cap is held on by 3 bolts / remove thermostat.

You will notice that the thermostat's air bleed hole is pointing up and lines up with notch in water pump housing,,

ATTENTION :failure to install new thermostat in the correct location will cause engine to overheat.

1. install new thermostat to water pump, make sure air bleed hole lines up with notch, install and tighten bolts, install a new lower radiator hose, fill cooling system.

thermostat # 17670-77E00
lower radiator hose #17854-65G20
hose clamp #09401-36403
upper radiator hose # 17852-65G20

Suzuki factory manual

You didn't state when it overheats, if it is while driving the fault can be : belt driving water pump slipping , lower radiator hose collapsing, most common is clogged radiator. Start the engine with the radiator cap off when it is COLD and observe the flow in side. If you see really fast flow of coolant you have the bottom portion of the radiator stopped up. The only way to know is to remove the radiator and have it flow tested.
A blown head gasket or cracked head will cause steam to come out of the exhaust, water in the oil (milky). If it is running hot while idling , check fan to see if it is turning as it should when it should. Older cars have fan clutches that go bad, newer ones have temp thermostats that go bad.

Find the location where the upper radiator hose connects to the intake manifold of the engine by tracing it from the radiator to thermostat intake housing bolted to the intake.

2 Remove the radiator hose from the thermostat intake housing by loosening the band clamp that secures it into place. With the clamp loosened, pull the hose off the housing.

3 Remove the two bolts that secure the housing to the intake manifold and then lift the housing off the intake.

4 Lift the thermostat out of the intake manifold and place the new thermostat into the hole. The end of the thermostat with the pin protruding from it sticks out of the intake manifold.

5 Lift the thermostat intake housing gasket off the intake manifold and place the new one onto the intake manifold.

6 Place the thermostat intake housing onto the intake manifold and bolt it into place. Reconnect the hose using the band clamp.

Six-Cylinder Engines

1 Drive the Dodge onto a set of front-end ramps and secure the parking break. Allow adequate time for the radiator fluid to cool down. Thirty minutes is usually adequate.

2 Loosen the petcock on the lower right hand side of the radiator and drain all of the radiator fluid into a drain pan. Close the petcock once drained.

3 Trace the lower radiator hose to the location where the hose connects to the engine block. The metal housing the hose connects to is the lower thermostat outlet. Remove the hose from the outlet by loosening the band clamp and then by pulling the hose off the outlet. Be careful--some fluid will drain from the hose.

4 Remove the two bolts that secure the thermostat outlet to the engine block and pull the thermostat outlet off the block.

5 Discard the O-ring inside the bottom edge of the thermostat outlet and place a new one into the outlet.

6 Pull the thermostat out of the engine block and replace it with a new one. The end with the pin protruding from it sticks out of the engine block.

7 Place the thermostat outlet onto the engine block and secure it into place. Reattach the lower radiator hose with the band clamp.

8 Open the radiator filler cap located on top of the radiator and fill the radiator with the fluid previously drained from the system.

please dont forget to give good rateing thank you

Section 303-03: Cooling, Engine 1997 Explorer, Mountaineer Workshop Manual REMOVAL AND INSTALLATION Radiator - 4.0L Removal

1. NOTE: Refer to following illustrations.
   Drain the cooling system by removing the radiator cap (8100) and attaching a 9.5 mm (3/8 inch) inside diameter hose to the draincock nipple, located at the lower rear corner of the radiator tank. Then, open the radiator draincock (8115) and allow the coolant to flow through the hose into a suitable container.

1. Loosen hose clamps at throttle body and engine air cleaner assembly. Remove air cleaner outlet tube and position aside.

1. Remove radiator overflow hose from the radiator, disconnect two hose locators at top of radiator and position hose aside.

1. Remove two fans shroud bolts. Lift the fan shroud out of the lower retaining clips and position it on the fan blade.

1. Position upper and lower radiator hose clamps, remove hose from radiator and position it on the fan blade.

1. Disconnect the two transmission cooling lines from the oil cooler fittings on the radiator, install protective caps over lines and position aside.

1. Remove two upper radiator bolts.

1. Tilt the radiator back (rearward) approximately 25 mm (one inch) and lift directly upward, clear of the radiator support bracket and the fan blade.

Installation

1. Position the radiator into engine compartments, make sure that mountings on both tanks are inserted into radiator support brackets. Install radiator retaining bolts. Tighten to 6-8 - (54-70 lb-in).

1. Remove protective caps from cooler lines. Connect the two transmission cooling lines at the oil cooler fittings on radiator. Tighten to 16-24 - (12-17 lb-ft).

1. Install upper radiator hose and position hose clamp. Tighten to 3 - (26 lb-in).

1. Install lower radiator hose and position hose clamp. Tighten to 3 - (26 lb-in).

1. Position fan shroud in lower retaining clips and install upper bolts. Torque to 6-8 - (54-70 lb-in).

1. Position radiator overflow hose, connect to radiator and locators.

1. Position air cleaner outlet tube to throttle body and air cleaner assembly. Tighten to 2-3 - (18-27 lb-in).

1. Fill the cooling system; refer to Cooling System Draining, Filling and Bleeding in this section.

Does your engine overheat? Could be a thermostat that is stuck, let me know with some clarification and i can help ou better. Thanks

Almost always , thermostats are located under the filler neck on top of the engine. The filler neck has the upper radiator hose attched to it, so follow the upper radiator hose from the radiator.
Here is a link that may help:

http://www.automedia.com/Keep_Your_Eye_on_the_Thermostat/ccr20041201th/1

the upper rad hose goes from the rad to the thermostate housing. this hose is @2-21/2" the lower hose same size goes from lower rad to water pump. There is a 5/8 hose from water pump to thermostate housing called bypass hose. and you have two hoses from water pump and intake to the heater core. hope this helps if not let me know thanks

I had this same problem and found a replacement inline filler cap housing at Summit Racing in Tallmadge, Ohio. There web address is: www.summitracing.com. They will ship anywhere and it cost around $40.00.