Calorstat TH6313.82 Engine Coolant Thermostat

Engine Coolant Thermostat for OE-Style Cooling Control

The Calorstat TH6313.82 engine coolant thermostat is a standard replacement thermostat for select Audi TT and Nissan applications. It opens at 180°F (82°C) to regulate coolant flow and help the engine reach and maintain proper operating temperature.

Key Features

• Standard engine coolant thermostat design
• Start-to-open temperature: 180°F / 82°C
• Valve-seat diameter: 54.0 mm
• Sealing flange outside diameter: 2.12 in.
• Height between flanges: 0.88 in.
• By-pass side height: 22.5 mm
• Jiggle pin weep hole included for air bleeding
• Gasket or seal not included

Detailed Description

Calorstat TH6313.82 is an engine coolant thermostat built for direct cooling-system temperature regulation in vehicles that use an 82°C opening point. It is listed for 2000-2006 Audi TT and Audi TT Quattro, and for select Nissan Pulsar NX, 200SX, and Sentra applications. This part number, TH6313.82, is also referenced in interchange listings for related OE-style applications, including 21200-99B02 and 21200-99B03.

For Audi TT and Audi TT Quattro cooling system service, this thermostat helps maintain stable coolant circulation once operating temperature is reached. For Nissan Pulsar NX, Nissan 200SX, and Nissan Sentra fitments, the 180°F opening specification matches the listed application notes and supports factory-style temperature control.

What This Thermostat Helps Address

• Engine running too cool or taking too long to warm up
• Temperature fluctuation caused by a sticking thermostat
• Coolant flow issues related to delayed opening
• Cooling-system service on Audi TT, Audi TT Quattro, and select Nissan models
• Replacement of a worn OE-style thermostat assembly

Installation Notes and Tips

Verify housing dimensions and valve-seat diameter before installation. The gasket or seal is not included, so confirm the correct sealing component is on hand before service. The jiggle pin weep hole should be oriented to allow trapped air to escape during filling and bleeding. Always inspect the thermostat housing, coolant condition, and mating surfaces during replacement.

• Fits 2000-2006 Audi TT, N/A
• Fits 2000-2006 Audi TT Quattro, N/A
• Fits 1989 Nissan Pulsar NX, N/A
• Fits 1984-1987 Nissan Pulsar NX, N/A
• Fits 1984-1988 Nissan 200SX, N/A
• Fits 1988 Nissan Pulsar NX, N/A
• Fits 1987-1988 Nissan Sentra, N/A

Quality Assurance

Calorstat TH6313.82 is specified with OE-style dimensions and an 82°C opening temperature for the listed applications. Calorstat is associated with cooling-system components used in factory-style replacement service, and Vernet is noted as an OE supplier to Audi for the listed Audi fitments.