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This Quinton Hazell Coolant Thermostat (QTH511K) is designed for specific BMW 5 Series (E34) models, including the 530 i V8 and 540 i V8 sedans, and the 530 i Touring. Its key benefit is ensuring optimal engine temperature regulation for reliable performance. A potential caveat is the need to verify exact vehicle fitment before purchase. Key features include a precise opening temperature of 95°C and the inclusion of a gasket for complete installation.
| Model Part Number | QTH511K |
|---|---|
| Brand | Quinton Hazell |
The opening temperature indicates the point at which the thermostat begins to open, allowing coolant to flow through the radiator. At 95°C, this thermostat starts to open to regulate engine temperature.
This thermostat is designed for specific BMW 5 Series (E34) models, including the 530 i V8, 540 i V8, and 5 Touring (E34) 530 i. Always verify fitment using a vehicle lookup tool.
Yes, this Quinton Hazell QTH511K coolant thermostat comes with a gasket or seal for a complete installation.
You can use the make and model tool on the product page, or contact customer support with your vehicle's VIN (Vehicle Identification Number) to confirm compatibility.
The thermostat has a height of 34 mm, a main diameter of 183 mm, and a second diameter of 43 mm.
The compatible OEM reference number is BMW 11531702279.
Yes, cross references include BGA CT5139, BorgWarner (Wahler) 4519.95D, CALORSTAT by Vernet TH6497.95, JJ GROUP 1414601419, and VALEO 820424.
Ensure the thermostat is installed in the correct orientation and the gasket is properly seated. Check for any airlocks in the cooling system and bleed if necessary. Verify the cooling fan is operating correctly.
The thermostat may be stuck open or faulty. Re-verify installation and consider replacing the thermostat again if the issue persists.
Check that the thermostat housing bolts are torqued to specification and the gasket is correctly positioned and undamaged. Inspect the housing for cracks.
Compatibility Verification:
Before purchasing, it is crucial to confirm that the Quinton Hazell QTH511K thermostat is compatible with your specific BMW model and engine. Use the vehicle fitment tool or consult your owner's manual. If in doubt, contact customer support with your vehicle's VIN for confirmation.
Installation:
Installation of a coolant thermostat is typically performed as part of routine maintenance or when a cooling system issue is diagnosed. It involves draining some of the engine coolant, removing the old thermostat housing, replacing the thermostat and seal, and refilling the coolant system. It is recommended that this procedure be performed by a qualified mechanic.
Care:
Thermostats are sealed units and generally do not require specific cleaning. Their lifespan is dependent on the overall health of the cooling system. Regular inspection of coolant levels and the condition of hoses and the radiator are recommended to ensure the cooling system operates efficiently, which in turn supports the longevity of the thermostat.
