A Guide to the Engine Coolant Thermostat for the 2011-2015 Ford Lobo
Keep your Ford Lobo's engine from overheating by understanding when and how to replace your thermostat.
- A thermostat failing 'stuck open' is the most common issue, leading to a P0128 code and a slow-to-warm engine.
- An overheating engine from a 'stuck closed' thermostat is a critical failure requiring you to stop the vehicle immediately.
- Replacement is a DIY-friendly job for most owners, taking under two hours with basic tools.
- Before replacing the thermostat, check for common coolant leaks from hoses and connectors, which are frequent issues on these trucks.
Symptoms of a Failing Thermostat
A bad thermostat can fail in two ways: stuck open or stuck closed. If it's stuck open, your truck's engine will take a very long time to warm up, your heater might not blow hot air, and you may get a check engine light with code P0128. If it's stuck closed, the coolant can't reach the radiator, causing the engine to overheat quickly. This is a serious problem that can lead to major engine damage if you keep driving.
Choosing the Right Aftermarket Thermostat
When replacing the thermostat on your Lobo, you have options between OEM (Original Equipment Manufacturer) and aftermarket parts. While some mechanics always prefer OEM parts, quality aftermarket brands can offer reliable performance at a better price. For a critical part like a thermostat, it's important to choose a reputable brand.
| Brand Tier | Brands | General Quality & Notes |
|---|---|---|
| Tier 1: Recommended Aftermarket | Gates, Calorstat | Gates is a well-known brand in the aftermarket world, often considered a reliable alternative to OEM parts. Calorstat by Vernet is another established brand with a decent reputation. These brands are a good balance of quality and cost. |
| Tier 2: Economy Choice | Motorad | Motorad is a widely available, budget-friendly option. However, some forum discussions mention occasional issues with premature failure, such as sticking open soon after installation. It can be a viable option if budget is the primary concern, but be aware of the mixed reviews. |
Pro Tip: Many cooling system issues on the 2011-2014 5.0L and 3.5L engines are misdiagnosed. Before replacing the thermostat, check for common coolant leaks from the upper radiator hose O-ring, the T-connector, and the coolant reservoir hoses, as these are frequent failure points.
Cost of Replacing a Ford Lobo Thermostat
The cost depends on whether you do the job yourself or take it to a shop. The part itself is inexpensive, but labor can add up.
| Item | Estimated Cost |
|---|---|
| New Aftermarket Thermostat | $12.49 - $32.72 |
| New OEM Thermostat | $21.00 - $138.00 |
| Shop Labor | $124 - $182 |
| Total Professional Replacement | ~$150 - $320+ |
Note: Prices are estimates and can vary based on location, specific engine, and repair shop rates. Some estimates show higher total costs, potentially including a full system flush.
Frequently Asked Questions
Is it hard to replace a thermostat on a 2011-2015 Ford Lobo?
For most DIY mechanics, it's a manageable job. The difficulty is about a 2 out of 5. It typically requires draining some coolant, removing the air intake tube for access, and unbolting the thermostat housing. The most common engines (5.0L V8 and 3.5L EcoBoost) have slightly different procedures but both are well-documented in online videos.
Do I need to replace the thermostat housing at the same time?
Not always, but it's a good idea to inspect it for cracks or warping when you have it off. On these trucks, the housing is plastic and can become brittle over time. Some thermostats come as an assembly with the housing included.
What coolant should I use for my Ford Lobo?
Always use the coolant type specified by Ford for your model year. For this generation, it is typically Motorcraft Orange Antifreeze/Coolant. Using the wrong type can cause cooling system problems. Always check your owner's manual to be sure.
Are there any recalls for the thermostat on the 2011-2015 Ford Lobo?
No, there are no specific recalls for the engine coolant thermostat on this generation of Ford Lobo or F-150. However, there are Technical Service Bulletins (TSBs) related to the cooling system and sensors that can sometimes cause similar symptoms, like TSB 21-2168 for certain engines which addresses issues with the coolant temperature sensor.
Technical Specifications
OEM Part Numbers: BL3Z-8575-B BL3Z-8575-A RT-1213 BL3Z-8A586-F
Standard temperature rating is typically 190°F (88°C). The part may be the thermostat alone or a complete assembly with the housing.
We Have This Part in Stock
The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- Ford Lobo: