Coolant Thermostat - Quinton Hazell - QTH511K
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Product Information
Full details
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.
All features
| Model Part Number | QTH511K |
|---|---|
| Brand | Quinton Hazell |
Extended Product Information
FAQs
What does the opening temperature of 95°C mean?
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.
What BMW models is this thermostat compatible with?
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.
Does this thermostat come with a gasket?
Yes, this Quinton Hazell QTH511K coolant thermostat comes with a gasket or seal for a complete installation.
How can I confirm if this part fits my car?
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.
What are the dimensions of this thermostat?
The thermostat has a height of 34 mm, a main diameter of 183 mm, and a second diameter of 43 mm.
What is the OEM part number for this thermostat?
The compatible OEM reference number is BMW 11531702279.
Are there alternative part numbers for this thermostat?
Yes, cross references include BGA CT5139, BorgWarner (Wahler) 4519.95D, CALORSTAT by Vernet TH6497.95, JJ GROUP 1414601419, and VALEO 820424.
Troubleshooting
Engine overheating after installation
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.
Engine takes too long to warm up
The thermostat may be stuck open or faulty. Re-verify installation and consider replacing the thermostat again if the issue persists.
Coolant leaks from thermostat housing
Check that the thermostat housing bolts are torqued to specification and the gasket is correctly positioned and undamaged. Inspect the housing for cracks.
Pros and Cons
Pros
- Ensures consistent engine operating temperature.
- Designed for specific BMW E34 models.
- Includes a gasket for a complete repair.
- Helps prevent engine damage from overheating or undercooling.
- Features clearly listed cross-reference part numbers.
Cons
- Requires careful verification of vehicle fitment.
- Only compatible with specific BMW E34 engine variants.
- Installation may require specialized tools or mechanical knowledge.
Setup, Compatibility & Care
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.