Joining socket for water pump housing. Porsche 996 Turbo / 997 Turbo / GT3  ❭  99610623871

Joining socket for water pump housing
This OE Match joining socket is a water pump housing connector used in the Porsche 911 cooling system. It is designed to connect the water pump housing and related coolant pipework, providing an OE-style fit and reliable sealing performance.
Sold individually, 

Fits:
Porsche 996 Turbo 2001 - 2005
Porsche 996 GT3 2000 - 2005
Porsche 997 Turbo / GT2 2007 - 2009
Porsche 997 GT2 RS 2011
Porsche 997 GT3 2007 - 2011

Diagram ref no 17

The joining socket forms a secure connection point within the coolant circuit, allowing coolant to pass correctly between the water pump housing and connected fittings or pipe sections. It helps maintain coolant flow, supports engine temperature control, and prevents coolant leaks around the water pump housing area.

Functions
•  Connects the water pump housing to coolant fittings or pipework
•  Helps maintain correct coolant flow through the engine cooling system
•  Provides a secure joining point between cooling system components
•  Helps prevent coolant leaks at the water pump housing connection
•  Supports reliable engine temperature regulation
•  Restores correct fitment when replacing or servicing coolant pipes
•  OE Match design for direct replacement and accurate installation

The water pump housing joining socket is exposed to constant heat cycles, coolant pressure, vibration, and age-related wear. Over time, the connector can corrode, crack, seize, or fail to seal correctly, leading to coolant leaks or poor cooling system reliability. Replacing it during water pump or coolant pipe service helps ensure a tight, secure connection and protects the engine from coolant loss or overheating.

When to Replace
•  Coolant is leaking around the water pump housing or pipe connection
•  The joining socket is cracked, corroded, damaged, or seized
•  The cooling system has been dismantled for water pump or pipework repairs
•  Coolant fittings or pipe bends are being replaced
•  The original connector no longer seals correctly
•  There are signs of coolant residue or staining near the connection
•  As preventative maintenance during major cooling system work

This connector fits into the engine's cooling system, near the water pump housing. It connects the cooling system hoses or fittings to the water pump housing and can be used at several points in the cooling system, depending on the engine model and design. Some refer to it as a water pipe joining socket, water pump housing connector, or coolant pipe adapter.

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

99610623871

The product you are viewing cross references to these numbers