Water Pump. Porsche 996 Turbo / 996 GT3

Replacement water pump with gasket. Impeller 64,0 mm diameter
The OE-Match water pump is a direct-fit replacement designed for Porsche 996 Turbo / GT-variants models. This replacement water pump provides consistent coolant circulation under varying engine loads - from everyday driving to spirited performance or track use. Its manufactured to OEM standards, allowing plug-and-play installation.

Fits:
Porsche 996 Turbo / GT2 2001 - 2005
Porsche 996 GT3 1999 - 2005
Porsche 996 GT3 RS 2003 - 2004

Diagram ref no 2

NOTE: Water Pump COMES WITH MOUNTING GASKET.

The water pump circulates coolant from the radiator through the engine block and heads, then back to the radiator to reject heat. This circulation prevents the engine from overheating, preserves optimal combustion temperatures, and protects internal components under load or high temperature conditions. With correct flow rates and seal integrity, the OE Match pump ensures stable thermal management across all driving scenarios.

Over time and mileage, the original water pump can suffer from impeller wear, seal degradation, bearing fatigue or corrosion - especially given the demanding thermal environment of the 996’s flat-six engine. A failing pump can lead to reduced coolant flow, overheating, coolant leaks and potential engine damage. Replacing with a correctly specified OE Match unit restores reliable coolant circulation, prevents overheating, and prolongs engine life.

When to replace:
• Coolant leaks visible at pump housing or around gasket/seal area
• Overheating on idle, in traffic or under load - temperature gauge rising above normal
• Unusual noises from the pump area (bearing hum, whine, vibration)
• After many years or high mileage - as part of preventive maintenance (common recommendation every ~4-5 years / ~60,000 miles)
• As part of a cooling-system overhaul (radiator, hoses, thermostat, belt) to ensure all components are fresh and compatible
• If pump’s impeller shows signs of wear or internal corrosion during inspection

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

99610601177

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