Motorad 5166KT Engine Coolant Thermostat Housing Assembly

Engine Coolant Thermostat Housing Assembly for OE-Style Cooling Control

Motorad 5166KT is an engine coolant thermostat housing assembly built for vehicles that need precise coolant temperature control and a direct-fit housing solution. It is engineered with OEM-quality materials and OE-supplier manufacturing standards for dependable performance in demanding cooling systems.

This Motorad Kit line product is built to OE specifications and processes, with a copper case and wax compound for quick reaction to coolant temperature changes. The offset design, air relief valve, and OEM-style seals are included where applicable to support proper cooling system operation.

• Engine coolant thermostat housing assembly for OE-style replacement
• Manufactured with OEM-quality materials and safety standards
• Copper case and wax compound for rapid temperature response
• Offset design and air relief valve included where applicable
• Black, silver finish with steel, stainless steel, copper, and rubber construction
• 2 bolt holes for application-specific mounting

Fitment Coverage

• Fits 2002-2007 Buick Rendezvous, N/A; Temperature 195F; includes housing, thermostat and seal; OE specified temperature; Kit
• Fits 2005-2006 Buick Terraza, N/A; Temperature 195F; includes housing, thermostat and seal; OE specified temperature; Kit
• Fits 1999-2006 Pontiac Montana, N/A; Temperature 195F; includes housing, thermostat and seal; OE specified temperature; Kit
• Fits 2005-2006 Saturn Relay, N/A; Temperature 195F; includes housing, thermostat and seal; OE specified temperature; Kit
• Fits 1994-2005 Buick Century, N/A; Temperature 195F; includes housing, thermostat and seal; OE specified temperature; Kit
• Fits 2000-2005 Chevrolet Impala, N/A; Temperature 195F; includes housing, thermostat and seal; OE specified temperature; Kit
• Fits 1995-2005 Chevrolet Monte Carlo, N/A; Temperature 195F; includes housing, thermostat and seal; OE specified temperature; Kit
• Fits 2001-2005 Pontiac Aztek, N/A; Temperature 195F; includes housing, thermostat and seal; OE specified temperature; Kit
• Fits 1994-2005 Pontiac Grand Am, N/A; Temperature 195F; includes housing, thermostat and seal; OE specified temperature; Kit
• Fits 1997-2004 Chevrolet Malibu, N/A; Temperature 195F; includes housing, thermostat and seal; OE specified temperature; Kit
• Fits 1999-2004 Oldsmobile Alero, N/A; Temperature 195F; includes housing, thermostat and seal; OE specified temperature; Kit
• Fits 1996-2004 Oldsmobile Silhouette, N/A; Temperature 195F; includes housing, thermostat and seal; OE specified temperature; Kit
• Fits 1991-2003 Pontiac Grand Prix, N/A; Temperature 195F; includes housing, thermostat and seal; OE specified temperature; Kit
• Fits 1991-2001 Chevrolet Lumina, N/A; Temperature 195F; includes housing, thermostat and seal; OE specified temperature; Kit
• Fits 1997-1999 Oldsmobile Cutlass, N/A; Temperature 195F; includes housing, thermostat and seal; OE specified temperature; Kit
• Fits 1994 Oldsmobile Cutlass, N/A; Temperature 195F; includes housing, thermostat and seal; OE specified temperature; Kit
• Fits 1996-1999 Pontiac Trans Sport, N/A; Temperature 195F; includes housing, thermostat and seal; OE specified temperature; Kit
• Fits 1994-1998 Buick Skylark, N/A; Temperature 195F; includes housing, thermostat and seal; OE specified temperature; Kit
• Fits 1994-1998 Oldsmobile Achieva, N/A; Temperature 195F; includes housing, thermostat and seal; OE specified temperature; Kit
• Fits 1991-1997 Oldsmobile Cutlass Supreme, N/A; Temperature 195F; includes housing, thermostat and seal; OE specified temperature; Kit
• Fits 1994-1996 Buick Regal, N/A; Temperature 195F; includes housing, thermostat and seal; OE specified temperature; Kit
• Fits 1994-1996 Chevrolet Corsica, N/A; Temperature 195F; includes housing, thermostat and seal; OE specified temperature; Kit
• Fits 1996 Chevrolet Lumina APV, N/A; Temperature 195F; includes housing, thermostat and seal; OE specified temperature; Kit
• Fits 1994-1996 Oldsmobile Cutlass Ciera, N/A; Temperature 195F; includes housing, thermostat and seal; OE specified temperature; Kit
• Fits 1994 Oldsmobile Cutlass Cruiser, N/A; Temperature 195F; includes housing, thermostat and seal; OE specified temperature; Kit

Common Cooling System Issues Addressed

• Incorrect engine operating temperature from a worn thermostat housing assembly
• Coolant flow irregularities caused by a thermostat that no longer responds quickly
• Leaks at the housing interface when the original assembly is degraded
• Temperature control concerns on Buick Century, Chevrolet Impala, and Pontiac Grand Prix applications
• Service replacement needs for 195F OE-specified cooling system setups

Installation Notes

Verify the OE-specified 195F temperature rating and confirm the housing style before installation. Clean the mating surfaces thoroughly, inspect adjacent coolant hoses and connectors, and follow the vehicle service procedure for coolant refill and air bleeding. This part cross-references 95166KT and NI for the same application.

Quality Assurance

Motorad manufactures this thermostat housing assembly using OEM specifications and processes with OE-supplier quality standards. The design uses a copper case and wax compound for responsive temperature control, along with OEM-style sealing features where applicable.