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Breather Pipes
By OE Match
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
- Porsche 996 C2 3.6L 09/01-2005
- Porsche 996 C4 3.6L 09/01-2005
- Porsche 996 C4S 3.6L 09/01-2005
- Porsche 997 MK1 Carrera 2 3.6L 2005-08
- Porsche 997 MK1 Carrera 2S 3.8L 2005-08
- Porsche 997 MK1 Carrera 4 3.6L 2005-08
- Porsche 997 MK1 Carrera 4S 3.8L 2005-08
Restore the integrity of your Porsche engine's oil cooling system with this OE Match Engine Oil Cooler Vent Hose
Fits:
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
- Porsche 996 C2 3.6L 09/01-2005
- Porsche 996 C4 3.6L 09/01-2005
- Porsche 996 C4S 3.6L 09/01-2005
- Porsche 997 MK1 Carrera 2 3.6L 2005-08
- Porsche 997 MK1 Carrera 2S 3.8L 2005-08
- Porsche 997 MK1 Carrera 4 3.6L 2005-08
- Porsche 997 MK1 Carrera 4S 3.8L 2005-08
Diagram Ref No 30
The vent hose forms part of the engine oil cooler system, providing the necessary connection between associated components and helping the system operate correctly. Positioned within the engine compartment, the hose is continually exposed to heat, vibration and temperature cycling, which can cause the original material to harden and deteriorate with age.
Replacing a brittle, cracked or damaged hose helps maintain a secure system and reduces the risk of leaks or further deterioration.
What Does an Engine Oil Cooler Vent Hose Do?
The oil cooler vent hose forms part of the connections associated with the engine oil cooling system. Its purpose is to maintain the correct routing and ventilation between the relevant components while providing a flexible connection capable of accommodating engine movement and vibration.
A serviceable hose helps provide:
Correct operation of the associated oil cooler system Secure connection between components Resistance to engine movement and vibration Reliable sealing and system integrity
Why Do Oil Cooler Vent Hoses Fail?
Engine compartment hoses naturally deteriorate with age. Continuous exposure to heat causes the material to gradually lose flexibility, while vibration and repeated heating and cooling cycles can accelerate deterioration.
Common causes include:
- Age and high mileage
- Constant engine heat
- Repeated heat cycles
- Rubber becoming hard or brittle
- Cracking around connection points
- Oil and chemical contamination
- Engine vibration
- Previous removal or incorrect installation
Older hoses may appear serviceable externally but can crack when disturbed during maintenance.
When Should the Hose Be Replaced?
Replacement should be considered if:
- Cracks or splits are visible
- The hose has become hard or brittle
- Connections are loose or deteriorated
- Leakage or residue is visible around the hose
- The hose is damaged during removal
- The oil cooler system is being serviced
- The engine is undergoing major maintenance or refurbishment
Preventative replacement is particularly worthwhile when surrounding components have already been removed, avoiding additional labour should an ageing hose fail later.
Porsche Engine Oil Cooler Hoses & Cooling System Components
The engine oil cooling system plays an important role in maintaining stable operating temperatures and protecting internal engine components. Hoses and connections within the system are therefore important service items, particularly as Porsche vehicles become older.
Heat, vibration and age can cause original hoses to become brittle, cracked or unreliable. Inspecting and replacing deteriorated hoses during oil cooler or engine maintenance helps prevent leaks and provides greater confidence in the integrity of the system.
When replacing an oil cooler vent hose, it is also worthwhile inspecting nearby hoses, connectors, seals and fittings for similar age-related deterioration.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610623053
The product you are viewing cross references to these numbers
OEMatch Breather Pipes — Fit, Function, Confidence
Breather pipes and crankcase ventilation parts for Porsche models manage oil vapour and internal pressure to protect lubrication and reduce leaks. OEMatch offers a focused selection of hoses, separators and seals suited to Porsche applications, covering routine maintenance and rebuild requirements.
Available Types
- Flexible breather hoses and oil vapour pipes
- Oil separator and catch can assemblies
- Crankcase vent hoses and connecting pipes
- Grommets, seals and mounting fittings
Understanding OEMatch Breather Pipes
OEM (Original Equipment Manufacturer) parts are made by the same company that produced your Porsche’s original breather pipes.
OE (Original Equipment) refers to parts matching original specifications for the breather pipes and may be supplied by alternative manufacturers. Aftermarket parts offer alternative options, sometimes with enhanced features or better value. OEMatch supplies non-OEM breather pipes engineered as direct-fit alternatives to OEM parts, made to original-spec dimensions and tolerances for Porsche models.
Breather pipes route crankcase vapour and blow-by gases away from the engine, helping to separate oil from vapour and return condensate to the sump or collection points. Correct ventilation reduces contamination, prevents pressure build-up and supports stable idling and consistent oil return across Porsche engines.
Benefits Include
- Restores correct crankcase ventilation and pressure control
- Helps reduce oil leaks and visible smoke
- Limits oil contamination and sludge formation
- Supports stable idling and efficient oil return
Why Breather Pipes Wear and Fail
- Heat-related hardening, cracking or brittleness of rubber and plastic hoses
- Oil and carbon build-up causing blockages or restricted flow
- Degraded or collapsed internal liners and collapsed passages
- Loose, hardened or damaged grommets and sealing fittings
The Importance of Replacing with OEMatch Breather Pipes
Keeping breather pipes in good condition prevents oil loss and contamination that can accelerate wear in Porsche engines. Replacing degraded hoses and seals reduces the risk of pressure-related faults and leaks, helping maintain reliable lubrication, consistent idling and longer component life when combined with regular oil and filter care.
Advantages
- Manufactured for oil and heat resistance appropriate to engine conditions
- Produced to original-spec dimensions for consistent performance
- Suitable for air-cooled and water-cooled Porsche engine layouts
