Calorstat TH5434.88J Engine Coolant Thermostat

Engine Coolant Thermostat for OE-Style Cooling Control

The Calorstat TH5434.88J engine coolant thermostat is a standard OEM-grade replacement built for precise coolant flow control. It opens at 190°F (88°C) and includes a gasket and seal for a direct service replacement on select Chrysler, Dodge, and Mitsubishi applications.

Key Features

• Engine coolant thermostat with standard design
• OEM grade type for OE-style fit and function
• Start to open temperature: 190°F / 88°C
• Gasket or seal included
• Jiggle pin weep hole for air bleeding during service
• Seal type: gasket with rubber + paper seal material
• By-pass valve diameter: 29.0 mm
• Valve-seat diameter: 56.0 mm
• Sealing flange outside diameter: 2.2
• Height between flanges: 1.69

Detailed Description

Calorstat TH5434.88J is an OEM-grade engine coolant thermostat engineered to regulate coolant temperature at the factory-specified opening point. It is a direct-fit cooling system service part for vehicles including the 2005 Chrysler Sebring, 2001-2005 Dodge Stratus, 2002-2005 Mitsubishi Eclipse, 2001-2004 Chrysler Sebring, 1999-2003 Mitsubishi Galant, 2003 Mitsubishi Outlander, and 2000-2001 Mitsubishi Eclipse. This part cross-references Gates 33921 for the same application. The TH5434.88J thermostat is also referenced by common interchange numbers including 387.88 and 820519.

What This Part Helps Address

• Engine running too cool or too hot due to thermostat sticking open or closed
• Slow warm-up after cold starts
• Temperature fluctuations during driving or idling
• Coolant flow control issues that affect heater performance
• Service replacement for worn thermostat and seal assemblies

Installation Notes and Tips

Verify the thermostat opening temperature, flange dimensions, and bypass valve sizing before installation. Clean the housing sealing surfaces thoroughly and replace the gasket or seal during service. The jiggle pin weep hole should be oriented to help trapped air escape during filling and bleeding. Confirm vehicle-specific fitment for your Chrysler Sebring, Dodge Stratus, or Mitsubishi Eclipse application before ordering.

Quality Assurance

Built to OEM-grade specifications, this thermostat is intended to match factory cooling system requirements for the listed applications. Calorstat TH5434.88J is specified with a rubber valve and integrated seal components for consistent service replacement.