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Fuel System Parts

Porsche 5 liter fuel can with Porsche crest logo.
Fits:
all Porsche models excluding USA
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
PCG80070300
The product you are viewing cross references to these numbers
- Porsche 9YA.2 Cayenne S Coupe V8 4.0L (474Hp) 2023>>
- Porsche 9YA.2 Cayenne Turbo E-Hybrid V8 4.0L (739Hp) 2023>>
- Porsche 9YA.2 Cayenne Turbo E-Hybrid Coupe V8 4.0L (739Hp) 2023>>
- Porsche 9YA.2 Cayenne Turbo E-Hybrid Coupe with GT Package V8 4.0 (739Hp) 2023>>
- Porsche 976 Panamera GTS V8 4.0L 2023>>
- Porsche 976 Panamera Turbo E-Hybrid V8 4.0L 2023>>
- Porsche 976 Panamera Turbo S E-Hybrid V8 4.0L 2023>>
High Pressure
Fuel Pump Tappet
Sold each - 2 required per car
The high pressure fuel pump tappet is a
precision-engineered component used in the direct-injection fuel system of Porsche
976 Panamera 4.0-litre models and 9YA.2 Cayenne 4.0-litre models.
Positioned between the camshaft and the high-pressure fuel pump, this tappet
transfers camshaft motion to drive the pump and generate the fuel pressure
required for efficient combustion.
Fits:
- Porsche 9YA.2 Cayenne S Coupe V8 4.0L 474Hp 2023>>
- Porsche 9YA.2 Cayenne Turbo E-Hybrid V8 4.0L 739Hp 2023>>
- Porsche 9YA.2 Cayenne Turbo E-Hybrid Coupe V8 4.0L 739Hp 2023>>
- Porsche 9YA.2 Cayenne Turbo E-Hybrid Coupe with GT Package V8 4.0 739Hp 2023>>
- Porsche 976 Panamera GTS V8 4.0L 2023>>
- Porsche 976 Panamera Turbo E-Hybrid V8 4.0L 2023>>
- Porsche 976 Panamera Turbo S E-Hybrid V8 4.0L 2023>>
Diagram ref no 13
In high-output Porsche V8 engines, accurate fuel pressure delivery is essential for performance, emissions control and long-term engine reliability—making this tappet a critical service part.
What Does a High Pressure Fuel Pump Tappet Do?
The tappet converts the rotating motion of the camshaft into
linear movement that actuates the high-pressure fuel pump. This process allows
the fuel system to:
Maintain
precise high fuel pressure
- Support direct fuel injection under load
- Ensure stable engine performance across the rev range
- Optimise combustion efficiency and emissions
Without a properly functioning tappet, the fuel pump cannot operate correctly, leading to drivability and performance issues.
Why Do High Pressure Fuel Pump Tappets Fail?
Due to their location and function, fuel pump tappets are
exposed to continuous mechanical contact, high loads and insufficient
lubrication risk. Common causes of failure include:
- Surface wear from camshaft contact
- Breakdown of protective coatings
- Oil contamination or reduced oil flow
- Extended service intervals
Typical symptoms of tappet wear or failure include:
- Loss of engine performance
- Fuel pressure fault codes
- Rough running or hesitation
- Increased wear to the camshaft or fuel pump
Why Replace the Fuel Pump Tappet?
Replacing a worn tappet helps:
- Restore correct fuel pressure delivery
- Protect the camshaft and fuel pump from damage
- Maintain smooth, consistent engine performance
- Prevent costly fuel system or valvetrain repairs
Early replacement is particularly important on high-performance 4.0-litre Porsche engines where component wear can escalate quickly if ignored.6
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
PAC109311
The product you are viewing cross references to these numbers
- Porsche 9YA.2 Cayenne S Coupe V8 4.0L (474Hp) 2023>>
- Porsche 9YA.2 Cayenne Turbo E-Hybrid V8 4.0L (739Hp) 2023>>
- Porsche 9YA.2 Cayenne Turbo E-Hybrid Coupe V8 4.0L (739Hp) 2023>>
- Porsche 9YA.2 Cayenne Turbo E-Hybrid Coupe with GT Package V8 4.0 (739Hp) 2023>>
- Porsche 976 Panamera GTS V8 4.0L 2023>>
- Porsche 976 Panamera Turbo E-Hybrid V8 4.0L 2023>>
- Porsche 976 Panamera Turbo S E-Hybrid V8 4.0L 2023>>
High Pressure
Fuel Pump Tappet
Sold each - 2 required per car
The high pressure fuel pump tappet is a
precision-engineered component used in the direct-injection fuel system of Porsche
976 Panamera 4.0-litre models and 9YA.2 Cayenne 4.0-litre models.
Positioned between the camshaft and the high-pressure fuel pump, this tappet
transfers camshaft motion to drive the pump and generate the fuel pressure
required for efficient combustion.
Fits:
- Porsche 9YA.2 Cayenne S Coupe V8 4.0L 474Hp 2023>>
- Porsche 9YA.2 Cayenne Turbo E-Hybrid V8 4.0L 739Hp 2023>>
- Porsche 9YA.2 Cayenne Turbo E-Hybrid Coupe V8 4.0L 739Hp 2023>>
- Porsche 9YA.2 Cayenne Turbo E-Hybrid Coupe with GT Package V8 4.0 739Hp 2023>>
- Porsche 976 Panamera GTS V8 4.0L 2023>>
- Porsche 976 Panamera Turbo E-Hybrid V8 4.0L 2023>>
- Porsche 976 Panamera Turbo S E-Hybrid V8 4.0L 2023>>
Diagram ref no 13
In high-output Porsche V8 engines, accurate fuel pressure delivery is essential for performance, emissions control and long-term engine reliability—making this tappet a critical service part.
What Does a High Pressure Fuel Pump Tappet Do?
The tappet converts the rotating motion of the camshaft into
linear movement that actuates the high-pressure fuel pump. This process allows
the fuel system to:
Maintain
precise high fuel pressure
- Support direct fuel injection under load
- Ensure stable engine performance across the rev range
- Optimise combustion efficiency and emissions
Without a properly functioning tappet, the fuel pump cannot operate correctly, leading to drivability and performance issues.
Why Do High Pressure Fuel Pump Tappets Fail?
Due to their location and function, fuel pump tappets are
exposed to continuous mechanical contact, high loads and insufficient
lubrication risk. Common causes of failure include:
- Surface wear from camshaft contact
- Breakdown of protective coatings
- Oil contamination or reduced oil flow
- Extended service intervals
Typical symptoms of tappet wear or failure include:
- Loss of engine performance
- Fuel pressure fault codes
- Rough running or hesitation
- Increased wear to the camshaft or fuel pump
Why Replace the Fuel Pump Tappet?
Replacing a worn tappet helps:
- Restore correct fuel pressure delivery
- Protect the camshaft and fuel pump from damage
- Maintain smooth, consistent engine performance
- Prevent costly fuel system or valvetrain repairs
Early replacement is particularly important on high-performance 4.0-litre Porsche engines where component wear can escalate quickly if ignored.6
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
PAC109311
The product you are viewing cross references to these numbers
Premium Fuel System Parts for Complete Engine Rebuilds and Reliable Fuel Delivery
Fuel system parts are essential components in any engine rebuild, ensuring precise fuel delivery, stable pressure and efficient combustion. From injectors and pumps to regulators, filters, lines and rails, these components work together to maintain optimal fuel flow—crucial for performance, smooth running and long-term engine durability.
Whether restoring a classic model, upgrading a performance engine or replacing age-worn parts, using high-quality fuel system components ensures your rebuilt engine operates efficiently from the very first start-up.
What Fuel System Parts Do
Fuel system components are responsible for delivering the
correct amount of fuel to the engine under all driving conditions.
Their key
functions include:
- Maintaining
consistent fuel pressure for reliable combustion
- Delivering
precise fuel quantities through injectors or carburettor circuits
- Filtering
contaminants to protect injectors and internal components
- Ensuring efficient cold starts and smooth idle
- Supporting
high-performance demands such as increased flow rates
- Preventing leaks and vapour loss through secure hoses and fittings
A healthy fuel system is essential for power, efficiency and engine reliability.
Why Fuel System Parts Commonly Fail
Fuel system components experience constant use, pressure
cycles and exposure to fuel contaminants.
Over time, this can lead to:
- Clogged
or worn fuel injectors affecting spray pattern and delivery
- Failing
fuel pumps struggling to maintain pressure
- Cracked,
brittle or leaking fuel lines caused by age and heat
- Blocked
filters restricting flow to the engine
- Faulty
pressure regulators causing rich or lean running
- Corrosion
inside metal components from water contamination
- Varnish buildup inside injectors or rails from aged fuel
Even minor issues in the fuel system can significantly impact performance, fuel economy and emissions.
Why Fuel System Parts Should Be Replaced During an Engine Rebuild
When rebuilding an engine, replacing worn or outdated fuel system components with high-quality, precision-engineered alternatives designed to match original performance standards ensures your rebuilt engine receives the clean, consistent fuel supply it needs.
Benefits include:
- Restored fuel flow and pressure stability
- Improved combustion efficiency and engine response
- Reduced risk of leaks, blockages or performance loss
- Protection against injector damage and detonation
- Cleaner running with reduced emissions
- Enhanced reliability for long-term operation
Upgrading or renewing the fuel system is one of the most effective ways to maximise the lifespan and performance of any rebuilt engine.