Motorad 5239-192 Engine Coolant Thermostat

Engine Cooling Thermostat for GM and Suzuki Applications

The Motorad UltraStat 5239-192 engine coolant thermostat is a 192 degree F replacement thermostat built for stable coolant control in a wide range of GM vehicles and the Suzuki Swift. It is a direct-fit cooling system service part for drivers replacing a worn thermostat on Buick, Chevrolet, Pontiac, Oldsmobile, or Suzuki applications.

Motorad UltraStat thermostats use heavy-gauge stainless steel construction for corrosion resistance and long service life. The UltraStat line also uses BLVT valve technology to reduce thermal shock in the cooling system, helping maintain smoother temperature transitions during warm-up and normal operation.

Key Features

• Part number 5239-192 engine coolant thermostat
• 192 degree F opening temperature
• Heavy-gauge stainless steel construction for corrosion resistance
• Jiggle pin weep hole included for air bleeding during service
• Sealing flange outside diameter: 1.73 in
• Flange thickness: 0.05 in
• No gasket or seal included
• No installation tool included

Detailed Product Overview

The Motorad UltraStat 5239-192 is built for OE-style cooling system service where accurate temperature regulation matters. Its 192F calibration is suited to vehicles that require this thermostat setting to maintain proper engine operating temperature. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Compatible With 2005-2009 Buick Allure, 2005-2009 Buick LaCrosse, 2006-2008 Buick Lucerne, 1997-2008 Pontiac Grand Prix, 1996-2005 Buick LeSabre, 1995-2005 Buick Park Avenue, 2000-2005 Chevrolet Impala, 1998-2005 Chevrolet Monte Carlo, 1995-2005 Pontiac Bonneville, 1996-2004 Buick Regal, 1998-2002 Chevrolet Camaro, 1998-2002 Pontiac Firebird, 1996-1999 Buick Riviera, 1998-1999 Chevrolet Lumina, 1995-1999 Oldsmobile 88, 1998-1999 Oldsmobile Intrigue, 1996-1999 Oldsmobile LSS, 1997-1998 Oldsmobile Regency, 1995-1996 Oldsmobile 98, and 1989-1990 Suzuki Swift. Use the 5239-192 when servicing a cooling system that calls for a 192 degree thermostat and OE-matching fitment.

Common Problems This Part Can Address

• Engine running too cool or taking too long to reach operating temperature
• Temperature fluctuations caused by a sticking thermostat
• Cooling system corrosion at the thermostat housing interface
• Air trapped in the cooling system during thermostat service
• Replacement of a thermostat that no longer opens at the specified temperature

Installation Notes and Tips

Drain coolant before removing the thermostat housing, and inspect the housing sealing surface for pitting or debris. Because no gasket or seal is included, verify the correct seal is on hand before installation. The jiggle pin weep hole should be oriented to help purge trapped air during refill, and the cooling system should be bled according to the vehicle service procedure after installation.

Quality Assurance

UltraStat thermostats are built with stainless steel construction for durability and corrosion resistance, and the BLVT valve design is used to reduce thermal shock to cooling system components. The Motorad 5239-192 is engineered to meet OE specifications for engine coolant thermostat service on listed applications.