Fel-Pro 35666 Engine Coolant Thermostat Seal

Reliable Engine Coolant Thermostat Seal for GM Vehicles

The Fel-Pro 35666 engine coolant thermostat seal is designed to provide a precise fit and reliable sealing for various General Motors vehicles. With a part dimension of 1.560 inches inner diameter, this seal ensures proper thermostat housing performance and coolant system integrity.

• Exact 1.560" inner diameter for accurate fitment
• Compatible with multiple Buick, Chevrolet, GMC, Oldsmobile, and Pontiac models
• Engineered to maintain coolant system pressure and prevent leaks
• Durable material designed to withstand engine heat and coolant exposure
• Part number 35666 for easy identification and replacement

Product Details and Specifications

The Fel-Pro 35666 engine coolant thermostat seal features a 1.560-inch inner diameter, making it suitable for a range of GM vehicles including Buick LeSabre, Chevrolet Camaro, GMC Jimmy, Oldsmobile Cutlass Ciera, and Pontiac Grand Prix among others. This seal is critical in maintaining a secure connection between the thermostat and housing, preventing coolant leaks that can lead to engine overheating or inefficient temperature regulation. The precision dimensions ensure a tight seal that supports the thermostat’s function within the cooling system.

Compatible Vehicles and Applications

This engine coolant thermostat seal is compatible with a variety of GM makes and models, including but not limited to:

• Buick: LeSabre, Century, Regal, LaCrosse
• Chevrolet: Camaro, Impala, Lumina, Monte Carlo, S10
• GMC: Jimmy, Sonoma, Safari
• Oldsmobile: Cutlass Ciera, Cutlass Calais, Intrigue
• Pontiac: Grand Prix, Firebird, Grand Am, Bonneville

Common Issues Addressed by the Thermostat Seal

• Prevents coolant leaks around the thermostat housing
• Maintains proper engine temperature regulation
• Reduces risk of engine overheating due to coolant loss
• Eliminates coolant contamination from external debris
• Ensures consistent thermostat operation and longevity

Installation Notes and Tips

• Ensure the thermostat housing and surrounding surfaces are clean and free of old gasket material before installation
• Verify the 1.560" inner diameter matches the thermostat and housing dimensions for proper fit
• Use appropriate torque specifications when securing the thermostat housing to avoid seal damage
• Inspect the seal for any defects prior to installation
• Replace the seal whenever the thermostat is serviced to maintain system integrity

Quality Assurance and Warranty Information

Fel-Pro parts are manufactured to meet or exceed OEM specifications, ensuring reliable performance in demanding engine environments. The 35666 engine coolant thermostat seal undergoes rigorous quality control to provide consistent sealing and durability. While specific warranty details may vary, Fel-Pro typically offers coverage against manufacturing defects to support long-term vehicle operation.