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Porsche Engine Cooling Coolant Hoses and Pipes (Rear engine cars) Coolant Hoses - Centre Section

Coolant return hose, Left. Porsche 987 Boxster / 987C Cayman / 997  ›  99710672803

Coolant return hose, Left. Porsche 987 Boxster / 987C Cayman / 997 - 99710672803
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99710672803/1
Product Information
Product Information

This left coolant return hose by OE Match is replacement hose for the left-hand return circuit.

Fits

  • Porsche 987 Boxster
  • Porsche 987C Cayman
  • Porsche 997

Check fitment for your specific vehicle (model, year, engine) before ordering.

Diagram ref no 31


What This Product Does

The hose carries returning coolant through its designated connection within the cooling circuit. It is the left-hand return component, rather than a supply hose or the adjoining rigid pipework.

Functions

  • Provides a passage for coolant returning through the circuit.
  • Connects the adjoining cooling-system components at the specified left-hand position.

Technical Details

  • Brand: OE Match; product reference: 99710672803.
  • Position and purpose: Left, coolant return line.

Symptoms of Fault

Possible signs include falling coolant levels, a sweet odour, damp connections, dried deposits around joints, swollen hose sections or leakage after shutdown. Gurgling and an increasing temperature reading can accompany coolant loss, but do not identify this hose alone as the cause.

Why Replacement Matters

Renewal is appropriate when inspection confirms deterioration, abrasion or leakage. Check nearby pipes, retaining brackets, connectors and clamps during the repair: an unresolved supporting fault can leave the replacement connection vulnerable to further damage.

FAQs

How can a suspected leak be located?
A cooling-system pressure test, combined with inspection of hose ends and adjoining connections, can help establish the source.

Why might coolant disappear without leaving a puddle?
Escaping coolant may collect on an undertray or evaporate before reaching the ground.

Does gurgling confirm hose failure?
No. Air entering through a leak or insufficient coolant can produce similar sounds; diagnose the complete circuit.

What should be checked before fitting?
Match the reference, model, engine and production details, then inspect the connecting hardware and supporting pipework.



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Related, superseded, cross reference or alternative numbers for comparison.

99710672803
99710672803

The product you are viewing cross references to these numbers