Calorstat TH6523.87 Engine Coolant Thermostat
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Calorstat

Calorstat TH6523.87 Engine Coolant Thermostat

Brand Calorstat TH6523.87
Sealing Flange Outside Diameter 2.63
Height Between Flanges 0.9
Type Standard
Gasket Or Seal Included No
Start to Open Temperature 188.0
9813 1.29
9844 1
By-Pass Valve Diameter 33.0
Height Shoulder 7.5
Height, By-Pass Side 23.0
Valve-Seat Diameter 67.0
With Rubber valve
Fits Volkswagen · 16 vehicles

Standard thermostat. Provides dependable coolant temperature control for consistent engine operation.

Rubber valve. Helps deliver smooth, reliable opening and closing action.

Gasket not included. Use your existing seal or source a separate gasket.

Cross-references Motorad 273-192, Motorad 7273-192 and 2.112.87.312 for the same application. See all 12.

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Engine Coolant Thermostat for Volkswagen Vanagon

Calorstat TH6523.87 is a standard engine coolant thermostat built for precise coolant flow control in the cooling system. It is listed for 1983-1991 Volkswagen Vanagon applications and matches the OE-style fit expected for Vanagon thermostat service.

Key Features

  • Standard engine coolant thermostat for cooling system temperature regulation
  • Start to open temperature: 188.0°F
  • Sealing flange outside diameter: 2.63 in.
  • Valve-seat diameter: 67.0 mm
  • By-pass valve diameter: 33.0 mm
  • Rubber valve design
  • Gasket or seal not included
  • Fits 1983-1991 Volkswagen Vanagon, N/A

Detailed Description

The Calorstat TH6523.87 thermostat is specified for Volkswagen Vanagon cooling system service where stable operating temperature matters. Its 188°F opening point, standard construction, and rubber valve design support controlled coolant circulation once the engine reaches operating temperature. This part number, TH6523.87, is also referenced in interchange listings for related OE-style applications, making it a practical choice when replacing a worn thermostat in a Vanagon.

This part cross-references Motorad (e.g., 273-192, 7273-192) for the same application.

What It Helps Address

  • Engine running too cool or too warm
  • Delayed warm-up after cold starts
  • Temperature fluctuation during normal driving
  • Cooling system flow control issues
  • Thermostat replacement during cooling system service

Installation Notes and Tips

Verify housing condition and sealing surfaces before installation. Because no gasket or seal is included, use the correct separate seal for the application. Confirm thermostat orientation and bypass alignment during installation, and inspect coolant condition and system pressure after service. For Volkswagen Vanagon maintenance, match the thermostat to the OE-style cooling system layout before final assembly.

Quality Assurance

Calorstat is listed as an OE supplier to Volkswagen for this application, and TH6523.87 is built to the specified dimensions and opening temperature for direct cooling system replacement service.

Related reading

This part fits 16 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelLitersCylindersNotes
1991VolkswagenTransporter2.1LH4Vernet is an OE Supplier to Volkswagen
1991VolkswagenVanagon2.1LH4Vernet is an OE Supplier to Volkswagen
1990VolkswagenTransporter2.1LH4Vernet is an OE Supplier to Volkswagen
1990VolkswagenVanagon2.1LH4Vernet is an OE Supplier to Volkswagen
1989VolkswagenTransporter2.1LH4Vernet is an OE Supplier to Volkswagen
1989VolkswagenVanagon2.1LH4Vernet is an OE Supplier to Volkswagen
1988VolkswagenTransporter2.1LH4Vernet is an OE Supplier to Volkswagen
1988VolkswagenVanagon2.1LH4Vernet is an OE Supplier to Volkswagen
1987VolkswagenTransporter2.1LH4Vernet is an OE Supplier to Volkswagen
1987VolkswagenVanagon2.1LH4Vernet is an OE Supplier to Volkswagen
1986VolkswagenTransporter2.1LH4Vernet is an OE Supplier to Volkswagen
1986VolkswagenVanagon2.1LH4Vernet is an OE Supplier to Volkswagen
1985VolkswagenTransporter1.9LH4Vernet is an OE Supplier to Volkswagen
1985VolkswagenVanagon1.9LH4Vernet is an OE Supplier to Volkswagen
1984VolkswagenVanagon1.9LH4Vernet is an OE Supplier to Volkswagen
1983VolkswagenVanagon1.9LH4Vernet is an OE Supplier to Volkswagen
Directly replaces or cross-references 12 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
Motorad — 273-192Motorad — 7273-1922.112.87.312028 287 00054155.874155.87D025121113025121113D025121113E025121113FTH09187G1TX 24 87D