Engine Block Hoses

O-Ring, 19.6 X 3.53N.
The O-Ring 19.6 x 3.53N is a genuine Porsche OEM sealing ring designed to create a tight, leak-free seal between coolant pipe connections and related engine cooling system components. Manufactured to precise dimensions, this O-ring fits into the mating groove of the pipe joint to prevent coolant loss and maintain correct system pressure. It is an essential replacement seal used on various Porsche coolant and inlet pipe applications.

Fits:

• Porsche 957 Cayenne S/GTS 4.8L 2007-10
• Porsche 957 Cayenne Turbo / Turbo S 4.8L 2007-10
• Porsche 958 Cayenne S V8 4.8L Petrol 400HP 2010-17
• Porsche 958 Cayenne GTS V8 4.8L Petrol 400HP 2010-17
• Porsche 958 Cayenne Turbo V8 4.8L Petrol 500HP 2010-17
• Porsche 958 Cayenne Turbo S V8 4.8L Petrol 550HP 2010-17
• Porsche 970.1 Panamera V6 3.6L 2WD 2009-13
• Porsche 970.1 Panamera 4 V6 3.6L 4WD 2009-13
• Porsche 970.1 Panamera S V8 4.8L 2009-13
• Porsche 970.1 Panamera 4S V8 4.8L 2009-13
• Porsche 970.1 Panamera GTS V8 4.8L 2011-13
• Porsche 970.1 Panamera Turbo V8 4.8L 2009-13
• Porsche 970.1 Panamera Turbo S V8 4.8L 2009-13
• Porsche 970.2 Panamera V6 3.6L 2WD (310Hp) 2014-16
• Porsche 970.2 Panamera 4 V6 3.6L 4WD (310Hp) 2014-16
• Porsche 970.2 Panamera GTS V8 4.8L 4WD (440Hp) 2014-16
• Porsche 970.2 Panamera Turbo V8 4.8L (520Hp) 2014-16
• Porsche 970.2 Panamera Turbo V8 Executive 2014-16
• Porsche 970.2 Panamera Turbo S V8 4.8L 2014-16 

• Seals coolant pipe joints to prevent coolant leaks between connected pipes and fittings.
• Maintains correct cooling system pressure, which is essential for efficient engine temperature control.
  
• Creates a tight seal between metal components by compressing inside a groove when the pipe connection is tightened.

• Coolant may seep or drip from the joint where the O-ring seals the connection.
• A worn O-ring can cause slow coolant loss, leading to frequent topping up.
• Loss of coolant or system pressure can reduce cooling efficiency and contribute to overheating.
• A leaking O-ring often produces a noticeable coolant smell near the engine bay.
• The O-ring may show cracking, flattening (loss of shape), swelling, hardening or brittleness
  
• Modern Porsche models may trigger low coolant warnings if leakage occurs.

• Prevents coolant leaks at pipe connections, avoiding coolant loss and contamination.
• Maintains correct system pressure, which is essential for efficient engine cooling performance.
  
• Helps prevent engine overheating, since even a small leak can lead to low coolant levels and temperature rise.
  
• Protects surrounding components, as leaking coolant can damage hoses, sensors, connectors, and nearby engine parts.
  
• Ensures reliable long-term sealing, since old O-rings harden and flatten over time due to heat and pressure cycles.

The Vent Breather Pipe is a OE MATCH component designed for the engine’s crankcase ventilation (PCV) system. This breather pipe routes crankcase vapours and excess pressure from the engine to the air/oil separator or intake system, helping maintain proper internal engine pressure and emissions control. It ensures correct fitment, reliable sealing, and long-term durability on Porsche 957 Cayenne S / GTS 4.8L models.

Fits:

• Porsche 957 Cayenne S/GTS 4.8L 2007-10

• Vents excess crankcase pressure created during engine operation.
  
• Routes blow-by gases and oil vapours to the PCV/air-oil separator system for proper ventilation.
  
• Helps reduce stress on engine seals and gaskets by preventing pressure build-up.
• Supports proper emissions control by returning vapours into the intake system rather than releasing them.

• Cracks or splits in the breather pipe can cause a vacuum leak, leading to rough running or unstable idle.
• A leaking breather pipe can trigger engine management faults related to vacuum system leaks, PCV system performance, air/fuel mixture imbalance.
  
• If crankcase pressure is not vented correctly, it can push oil past seals and gaskets, causing leaks.
• Oil vapours escaping from a damaged breather pipe may cause an oily smell in the engine bay.
• Symptoms may include oil filler cap difficult to remove, whistling/hissing noises, pressure-related seal issues.
  
• Breather pipes often fail due to age and heat, showing hardened plastic/rubber, cracking, broken fittings or connectors.
  
• If ventilation is disrupted, oil vapour can be drawn into the intake incorrectly, contributing to oil burning.

• Prevents vacuum leaks, which can cause rough idle, poor performance, and fault codes.
  
• Maintains proper crankcase ventilation, preventing pressure build-up inside the engine.
  
• Helps prevent oil leaks, since excessive crankcase pressure can force oil past seals and gaskets.
  
• Protects engine performance and efficiency, by keeping the air/fuel mixture stable and reducing unmetered air entering the system.
  
• Reduces risk of secondary damage, such as damaged seals, intake contamination, or long-term PCV system issues.