Calorstat TH4856.71J Engine Coolant Thermostat

Engine Coolant Thermostat for Volvo Cooling Service

Calorstat TH4856.71J is a standard engine coolant thermostat for select Volvo applications. It opens at 160.0 degrees and includes a gasket and rubber seal for a direct cooling-system service replacement.

Key Features

• Standard engine coolant thermostat for precise coolant flow control
• Start to open temperature: 160.0 degrees
• Gasket or seal included for installation
• Jiggle pin weep hole for air bleeding during service
• Seal type: gasket with rubber seal material
• Sealing flange outside diameter: 2.12 in.
• Valve-seat diameter: 54.0 mm
• By-pass valve diameter: 29.0 mm
• Height between flanges: 0.51 in.

Detailed Description

Calorstat TH4856.71J is built as a standard thermostat for Volvo cooling systems that need stable temperature regulation. It is listed for 1985-1994 Volvo 240, 740, 745, 760, 780, and 940 applications, including 1991-1994 Volvo 940, 1990-1993 Volvo 240, and 1985-1992 Volvo 740. Vernet is an OE supplier to Volvo, which supports the application coverage for these vehicles. This part cross-references 216-160 and 4089.71 for the same application.

What It Helps Address

• Engine running too cool or too hot
• Slow warm-up after cold starts
• Temperature fluctuation during driving
• Restricted coolant flow caused by a worn thermostat
• Cooling-system service on Volvo 240, 740, 760, 780, 745, and 940 models

Installation Notes and Tips

Verify the thermostat housing dimensions, valve-seat diameter, and by-pass valve diameter before installation. Replace the gasket or seal during service and confirm the jiggle pin weep hole is positioned to allow trapped air to escape. Always refill and bleed the cooling system according to Volvo service procedures after installation.

Quality Assurance

Calorstat TH4856.71J is an OE-style cooling component from a brand associated with Vernet supply to Volvo applications. Its listed dimensions and included gasket support accurate fitment for the specified Volvo models.