Calorstat TH6498.95J Engine Coolant Thermostat

Engine Coolant Thermostat for BMW Cooling Service

Calorstat TH6498.95J is an engine coolant thermostat with a plastic housing, built for precise coolant flow control in BMW cooling systems. It includes a gasket and rubber seal, plus a jiggle pin weep hole for easier air bleeding during service.

Key Features

• Plastic housing construction with black finish
• Starts to open at 203.0 degrees
• Gasket or seal included
• Jiggle pin weep hole included
• By-pass valve diameter: 39.0
• Height between flanges: 1.29
• Seal material: rubber

Detailed Description

This Calorstat engine coolant thermostat, part number TH6498.95J, is a direct-fit cooling system service component for select BMW 318i, 318is, 318ti, and Z3 models from 1996-1999. It uses a plastic housing design and a gasket-style seal to support proper coolant regulation at the specified opening temperature. Calorstat TH6498.95J also cross-references Febi-Bilstein 33937 for the same application.

Compatible With 1996-1999 BMW 318i, 1996-1999 BMW 318is, 1996-1999 BMW 318ti, and 1996-1999 BMW Z3. Vernet is an OE supplier to BMW, which supports application accuracy for these BMW cooling system repairs.

Common Issues This Part Can Address

• Engine running too cool or too hot due to thermostat sticking
• Delayed coolant circulation after cold start
• Temperature fluctuations from worn thermostat internals
• Coolant leaks at the thermostat housing seal area
• Air pockets in the cooling system after service

Installation Notes and Tips

Inspect the mating surfaces before installation and replace any damaged coolant hoses or housing components as needed. Make sure the gasket seats evenly and the cooling system is properly bled after service, especially when replacing a thermostat with a jiggle pin weep hole.

Quality Assurance

Built to OE-style specifications for the listed BMW applications, Calorstat TH6498.95J is intended for accurate temperature control and reliable sealing in routine cooling system maintenance.