OE Quality
60-Day Returns

Motorad 7511-185 Engine Coolant Thermostat
Reliable Engine Coolant Thermostat for Buick, Chevrolet, Pontiac, and Saturn
The Motorad Fail-Safe 7511-185 engine coolant thermostat is designed to maintain optimal engine temperature for a range of GM vehicles. Engineered to meet precise specifications, this thermostat ensures efficient coolant flow and temperature regulation for models like the Chevrolet Impala, Buick Lucerne, and Pontiac G6.
- Sealing flange outside diameter: 1.72 inches
- Includes a rubber gasket for a secure seal
- Equipped with a jiggle pin weep hole for air bleeding
- Bypass diameter of 1.09 inches and bypass length of 1.89 inches
- Flange thickness of 0.05 inches
- Thermostat opens at 185 degrees Fahrenheit
- One rubber seal included for reliable sealing
Detailed Features of the Motorad Fail-Safe 7511-185 Thermostat
This engine coolant thermostat from Motorad’s Fail-Safe line is built to provide consistent temperature control by opening at 185°F, which helps prevent engine overheating and promotes efficient warm-up. The included rubber gasket ensures a tight seal between the thermostat housing and engine, reducing the risk of coolant leaks. The jiggle pin weep hole allows trapped air to escape, improving coolant circulation and system performance. With a bypass diameter of 1.09 inches and length of 1.89 inches, this thermostat supports proper coolant flow during engine warm-up phases. The flange thickness of 0.05 inches and sealing flange diameter of 1.72 inches are designed to fit precisely in compatible GM vehicles.
About the Motorad Fail-Safe Product Line
The Fail-Safe line by Motorad focuses on delivering dependable engine cooling components that meet or exceed OEM specifications. This product line emphasizes durability and precise fitment, ensuring that parts like the 7511-185 thermostat maintain engine temperature effectively under various operating conditions. The Fail-Safe series is engineered to provide reliable performance for GM vehicles, including Buick, Chevrolet, Pontiac, and Saturn models.
Common Applications and Issues Addressed
- Maintains proper engine operating temperature for Buick Lucerne and Chevrolet Malibu
- Prevents engine overheating in Pontiac G6 and Saturn Vue
- Reduces coolant leaks with included rubber gasket seal
- Improves coolant circulation by venting trapped air via jiggle pin weep hole
- Supports efficient engine warm-up and temperature regulation in Chevrolet Impala and Buick Terraza
Installation Notes and Tips
Ensure the engine is cool before removing the old thermostat to avoid injury. Clean the thermostat housing surface thoroughly before installing the new Motorad 7511-185 thermostat to ensure a proper seal with the included rubber gasket. Verify the jiggle pin weep hole is unobstructed to allow air to escape during coolant system bleeding. This thermostat is compatible with specific Buick, Chevrolet, Pontiac, and Saturn models; confirm fitment before installation.
Quality Assurance and Warranty
Motorad’s Fail-Safe 7511-185 thermostat is manufactured to meet strict quality standards for durability and performance. The part includes one rubber seal to ensure leak-free operation. While specific warranty details are not provided, Motorad products typically adhere to industry standards for reliability and fitment in compatible GM vehicles.
| Brand | Motorad |
| Part Number | 7511-185 |
| Position | Fail-Safe |
| Sealing Flange Outside Diameter | 1.72 |
| Gasket Or Seal Included | Yes |
| Jiggle Pin Weep Hole | Yes |
| Bypass Diameter | 1.09 in |
| Bypass Length | 1.89 in |
| Flange Thickness | 0.05 in |
| Gasket/Seal Material | Rubber |
| Gasket/Seal Material | Rubber |
| Installation Tool Included | No |
| Number Of Seals | 1 |
| Temperature | 185 deg. f |
| Temperature (Degree) | 185 |
This part fits 49 vehicles. Search below:
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2011 | Buick | Lucerne | 3.9L | V6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 185F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2011 | Chevrolet | Impala | 3.9L | V6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 185F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2011 | Chevrolet | Impala | 3.5L | V6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 185F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2010 | Buick | Lucerne | 3.9L | V6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 185F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2010 | Chevrolet | Impala | 3.9L | V6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 185F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2010 | Chevrolet | Impala | 3.5L | V6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 185F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2010 | Chevrolet | Malibu | 3.5L | V6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 185F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2010 | Pontiac | G6 | 3.5L | V6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 185F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2010 | Saturn | Vue | 3.5L | V6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 185F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2009 | Buick | Lucerne | 3.9L | V6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 185F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2009 | Chevrolet | Impala | 3.9L | V6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 185F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2009 | Chevrolet | Impala | 3.5L | V6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 185F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2009 | Chevrolet | Malibu | 3.5L | V6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 185F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2009 | Chevrolet | Uplander | 3.9L | V6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 185F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2009 | Pontiac | G6 | 3.9L | V6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 185F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2009 | Pontiac | G6 | 3.5L | V6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 185F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2009 | Pontiac | Montana | 3.9L | V6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 185F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2009 | Saturn | Vue | 3.5L | V6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 185F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2008 | Chevrolet | Impala | 3.9L | V6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 185F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2008 | Chevrolet | Impala | 3.5L | V6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 185F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2008 | Chevrolet | Malibu | 3.5L | V6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 185F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2008 | Chevrolet | Uplander | 3.9L | V6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 185F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2008 | Pontiac | G6 | 3.9L | V6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 185F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2008 | Pontiac | G6 | 3.5L | V6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 185F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2008 | Pontiac | Montana | 3.9L | V6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 185F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2008 | Saturn | Aura | 3.5L | V6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 185F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2008 | Saturn | Vue | 3.5L | V6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 185F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2007 | Buick | Terraza | 3.9L | V6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 185F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2007 | Chevrolet | Impala | 3.9L | V6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 185F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2007 | Chevrolet | Impala | 3.5L | V6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 185F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2007 | Chevrolet | Malibu | 3.9L | V6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 185F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2007 | Chevrolet | Malibu | 3.5L | V6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 185F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2007 | Chevrolet | Monte Carlo | 3.5L | V6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 185F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2007 | Chevrolet | Uplander | 3.9L | V6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 185F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2007 | Pontiac | G6 | 3.9L | V6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 185F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2007 | Pontiac | G6 | 3.5L | V6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 185F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2007 | Pontiac | Montana | 3.9L | V6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 185F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2007 | Saturn | Aura | 3.5L | V6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 185F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2007 | Saturn | Relay | 3.9L | V6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 185F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2006 | Buick | Terraza | 3.9L | V6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 185F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2006 | Chevrolet | Impala | 3.9L | V6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 185F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2006 | Chevrolet | Impala | 3.5L | V6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 185F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2006 | Chevrolet | Malibu | 3.9L | V6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 185F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2006 | Chevrolet | Monte Carlo | 3.9L | V6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 185F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2006 | Chevrolet | Monte Carlo | 3.5L | V6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 185F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2006 | Chevrolet | Uplander | 3.9L | V6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 185F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2006 | Pontiac | G6 | 3.9L | V6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 185F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2006 | Pontiac | Montana | 3.9L | V6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 185F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2006 | Saturn | Relay | 3.9L | V6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 185F; Includes seal; OE Specified Temperature; Fail-Safe |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
This part directly replaces or is cross-referenced with the following part numbers:
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.