Calorstat TH1514.81J Engine Coolant Thermostat

Engine Coolant Thermostat Overview

Calorstat TH1514.81J is an OEM-grade engine coolant thermostat built for precise coolant flow control and stable operating temperature. It includes a gasket seal and a jiggle pin weep hole for service-friendly installation and air bleeding.

Key Features

• OEM-grade standard thermostat for cooling system service
• Starts to open at 178.0°F for temperature regulation
• Includes gasket seal with rubber seal material
• Jiggle pin weep hole helps purge trapped air during filling
• Flow limiting valve included for controlled coolant circulation
• By-pass valve diameter: 29.0 mm
• Valve-seat diameter: 54.0 mm
• Sealing flange outside diameter: 2.12 in
• Height between flanges: 1.24 in
• Height, by-pass side: 31.7 mm

Detailed Description

Calorstat TH1514.81J is an engine coolant thermostat for vehicles that require a 178°F opening temperature and OEM-style fitment. It is built with a gasket seal, rubber sealing material, and a jiggle pin weep hole to support proper sealing and coolant system bleeding. This thermostat is a practical choice for cooling system maintenance on applications such as Toyota Camry and Toyota Corolla, where accurate temperature control is important for consistent engine operation. The TH1514.81J part number is also referenced in cross-application catalogs, including AMS Automotive 4477.

Common Cooling System Issues It Can Address

• Engine running cooler or hotter than normal due to thermostat wear
• Slow warm-up after cold starts
• Temperature fluctuation from restricted thermostat movement
• Coolant flow imbalance caused by a sticking valve
• Seepage at the thermostat housing seal area

Installation Notes and Tips

Install TH1514.81J with a clean mating surface and verify the gasket seats evenly before tightening the housing. The jiggle pin weep hole should be positioned to help vent trapped air during refill. After installation, refill and bleed the cooling system according to the vehicle service procedure, then confirm normal operating temperature and heater performance. Fits 2000-2001 Toyota Camry, front; Fits 2000-2002 Toyota Corolla, front.

Quality Assurance

Calorstat TH1514.81J is an OEM-grade thermostat built to meet standard cooling system service requirements. Its construction includes a gasket seal and flow limiting valve for controlled coolant regulation.