What steps should be taken before assuming the thermostat is responsible for a cooling system issue on Mitsubishi Montero?

Prior to assuming that the thermostat is to blame for an issue with a cooling system, check the level of coolant, water pump, drivebelt tension, and temperature gauge operation. If your engine takes an excessive time to warm up, then your thermostat may be stuck open and need replacement. On the other hand, if the engine runs hot yet the upper radiator hose isn't hot, the thermostat may be stuck closed, not allowing coolant to escape to the radiator. This is a part that should to be replaced. Driving your vehicle without thermostat could cause poor emissions and bad fuel economy, so avoid doing that. The upper radiator hose is hot if coolant is flowing, indicating the thermostat is open. In order to change the thermostat, remove the negative battery cable and drain the cooling system, saving the coolant if in good condition. To locate the thermostat housing, follow the upper radiator hose to the engine. Loosen the clamp on the hose and take the hose off the fitting. If the hose is stuck, use these Channelock pliers to break the seal, or cut it off if it is old. Inspect the large fitting, if it corroded the cover for the thermostat housing may need to be replaced. You may need to tap it gently to loosen the housing cover after removing the bolts. Before you take it out, make a note of the orientation of the old thermostat, then clean the old gasket material from the housing and the cover. Install the new thermostat oriented with the correct end up. Apply RTV sealant to the new gasket and place it on the housing. Replace the cover and the bolts tightening them to the specified torque, reconnect the hose and tighten the clamp. To refill the cooling system, it is necessary to start the engine and test for leaks.

Genuine Mitsubishi Montero Thermostat

Engine Coolant Thermostat

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5 Thermostats found

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Mitsubishi Montero Thermostat Part Number: 1305A191
$24.50 MSRP: $31.90
You Save: $7.40 (24%)
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Product Specifications
- Other Name: Thermostat Kit; Engine Coolant Thermostat; Thermostat, Coolant
- Warranty: This genuine part is guaranteed by Mitsubishi's factory warranty.
Fits the following Vehicles:
- 2003-2006, 1994-1996 Mitsubishi Montero | LS, Limited, SR, XLS | 6 Cyl 3.0 L GAS, 6 Cyl 3.5 L GAS, 6 Cyl 3.8 L GAS
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Mitsubishi Montero Thermostat Part Number: MD972903
$25.36 MSRP: $33.02
You Save: $7.66 (24%)
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Product Specifications
- Other Name: Thermostat Kit; Engine Coolant Thermostat; Thermostat, Coolant
- Warranty: This genuine part is guaranteed by Mitsubishi's factory warranty.
Fits the following Vehicles:
- 1984-1994 Mitsubishi Montero | Base, LS, RS, SP, SR, Sport | 4 Cyl 2.6 L GAS, 6 Cyl 3.0 L GAS
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Mitsubishi Montero Thermostat Part Number: MD350415
$30.14 MSRP: $39.25
You Save: $9.11 (24%)
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Product Specifications
- Other Name: Thermostat Kit, 88C; Engine Coolant Thermostat
- Warranty: This genuine part is guaranteed by Mitsubishi's factory warranty.
Fits the following Vehicles:
- 1998-2000 Mitsubishi Montero | Base | 6 Cyl 3.5 L GAS
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Mitsubishi Montero Thermostat Part Number: 1305A239
$33.76 MSRP: $44.30
You Save: $10.54 (24%)
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Product Specifications
- Other Name: Thermostat Kit
- Warranty: This genuine part is guaranteed by Mitsubishi's factory warranty.
Fits the following Vehicles:
- 2001-2002 Mitsubishi Montero | Limited, XLS | 6 Cyl 3.5 L GAS
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Mitsubishi Montero Thermostat Part Number: MD194988
$35.56 MSRP: $46.66
You Save: $11.10 (24%)
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Product Specifications
- Other Name: Thermostat Kit, 82C; Engine Coolant Thermostat; Thermostat, Coolant
- Warranty: This genuine part is guaranteed by Mitsubishi's factory warranty.
Fits the following Vehicles:
- 1997 Mitsubishi Montero | LS, SR | 6 Cyl 3.5 L GAS

Mitsubishi Montero Thermostat

Mitsubishi Montero Thermostat controls the temperature and regulates the coolant in the engine cooling system, allowing the flow of coolant for steady operations by opening and closing. The small device, which sits close to the radiator, remains closed when the engine is warming up and blocks the coolant until the heat rises to a particular level. In this scenario, an internal valve opens, allowing coolant between the engine and radiator. The coolant carries away this excess heat so that it does not overheat. As temperatures decline and approach the lower limit, the valve moves in the direction of the closed position. This reduces flow so the engine does not run too cool. The mechanical cycle repeats constantly while you drive. As a result, the engine reaches ideal efficiency more quickly after startup; it then holds that efficiency, regardless of road and weather conditions. The element uses temperature responsive metal that expands and contracts in a predictable manner, thereby eliminating the need for additional energy or manual manipulation. The balanced thermal conditions, in turn, cause the combustion to remain uniform, the oil viscosity stable, and the emissions uniform. Every Mitsubishi made for good reliability uses this principle, and the Montero benefits from the same principle. When the Thermostat is functioning properly, the cooling circuit of the Mitsubishi can quickly adapt to changing loads, which ensures the Montero will be reliable when idling in traffic or climbing hills in the countryside. The Mitsubishi Montero can have temperature spikes or slow warm-up when the Thermostat malfunctions. Regular care of your timely Thermostat will preserve your cooling efficiency and protect your vital engine components.

OEM Thermostat can boast superior quality and long-term durability. Each part meets strict factory specs and passes careful checks in production. So you'll get Thermostat with long-lasting strength and an exact fit. If you need OEM Mitsubishi Montero Thermostat, the online store is the ideal place. The store carry a wide range of genuine Mitsubishi Montero parts at the highly competitive prices. You'll enjoy a simple and no-hassle shopping experience. You'll get unbeatable prices and fast delivery service. You'll get the manufacturer's warranty and a straightforward return policy. Shop with confidence and keep your car in top condition.

Mitsubishi Montero Thermostat Parts Questions & Experts Answers

Thermostat
MD972903
Q: What steps should be taken before assuming the thermostat is responsible for a cooling system issue on Mitsubishi Montero?
A:
Prior to assuming that the thermostat is to blame for an issue with a cooling system, check the level of coolant, water pump, drivebelt tension, and temperature gauge operation. If your engine takes an excessive time to warm up, then your thermostat may be stuck open and need replacement. On the other hand, if the engine runs hot yet the upper radiator hose isn't hot, the thermostat may be stuck closed, not allowing coolant to escape to the radiator. This is a part that should to be replaced. Driving your vehicle without thermostat could cause poor emissions and bad fuel economy, so avoid doing that. The upper radiator hose is hot if coolant is flowing, indicating the thermostat is open. In order to change the thermostat, remove the negative battery cable and drain the cooling system, saving the coolant if in good condition. To locate the thermostat housing, follow the upper radiator hose to the engine. Loosen the clamp on the hose and take the hose off the fitting. If the hose is stuck, use these Channelock pliers to break the seal, or cut it off if it is old. Inspect the large fitting, if it corroded the cover for the thermostat housing may need to be replaced. You may need to tap it gently to loosen the housing cover after removing the bolts. Before you take it out, make a note of the orientation of the old thermostat, then clean the old gasket material from the housing and the cover. Install the new thermostat oriented with the correct end up. Apply RTV sealant to the new gasket and place it on the housing. Replace the cover and the bolts tightening them to the specified torque, reconnect the hose and tighten the clamp. To refill the cooling system, it is necessary to start the engine and test for leaks.