Porsche Engine Coolant Thermostat - Metzger 4006488M

Product Information

Thermostats are a simple device which regulates coolant flow through the engine. When cold it will stay closed, stopping coolant flow and helping the engine warm up faster. Once up to temperature, it will open and allow normal coolant flow and maintain proper engine temperature. Always install with the 'jiggle pin' bleed valve at 12 o'clock when possible.

For many applications, multiple temperature ratings are available. These ratings denote when the thermostat opens, and in extreme climates different temperature ratings can be used to assist the vehicle in maintaining proper temperatures. In very hot desert climates for instance, a lower temperature rated thermostat may be preferred.

There are two types of thermostat failures:

Thermostat stuck open (most common): Coolant will flow through the engine constantly from cold, preventing the engine from reaching operating temperature. Usually this means a rich mixture resulting in poor fuel mileage and potential catalytic converter damage.

Thermostat stuck closed: If the thermostat is stuck closed it will restrict flow into the engine resulting in an overheating condition, resulting in potential catastrophic engine damage.

• Overheating engine
• Engine not reaching optimal running temperature
• Radiator fan not engaging

About Metzger

Metzger is a modern family-owned German business with more than 40 years of experience in the distribution of automotive spare parts to more than 55 countries. At Metzger Autoteile, quality assurance is the top priority. Their in-house quality control laboratory ensures that products meet stringent standards with the utmost care and thorough testing procedures. Metzger stocks more than 35,000 SKUs and thanks to their fully automated warehouse, can ensure rapid delivery. In addition, they are a well-recognized supplier of electronic components and niche products, many of which were not previously available to the aftermarket. Their aim is to always be one step ahead and to be first to market, securing competitive advantages for our customers.