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- Porsche 958 Cayenne S V6 3.0L Hybrid (380Hp) 2010-17
- Porsche 970.1 Panamera S Hybrid V6 3.0L 2011-13
- Porsche 970.2 Panamera S E-Hybrid V6 3.0L (416Hp) 2014-16
- Porsche 95B.1 Macan Petrol 2.0L (237Bhp) 2014-18
- Porsche 95B.2 Macan Petrol 2.0L (245Bhp) 2019-21
Hydraulic Tappet / Valve Lifter
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The hydraulic tappet / valve lifter is a precision
valvetrain component used in Porsche Macan 2.0ltr, Cayenne S Hybrid and
Panamera S Hybrid engines to automatically maintain correct valve clearance. By
using engine oil pressure, the tappet ensures smooth valve actuation, quiet
engine operation and consistent performance under all driving conditions.
Fits:
Diagram ref no 6
In advanced Porsche petrol and hybrid powertrains, accurate valve control is essential for efficiency, refinement and long-term engine durability—making hydraulic tappets a critical service component.
What Does a Hydraulic Tappet / Valve Lifter Do?
Hydraulic tappets sit between the camshaft and the valves,
using pressurised engine oil to compensate for thermal expansion and component
wear. This allows the valvetrain to operate with:
- Correct valve timing and lift
- Reduced mechanical noise
- Smooth idle and throttle response
- Improved combustion efficiency
By eliminating the need for manual valve clearance adjustment, hydraulic tappets help maintain optimal engine performance throughout the engine’s service life.
Why Do Hydraulic Tappets Fail?
Hydraulic tappets operate in high-temperature, high-load
environments and rely heavily on clean, correctly pressurised oil. Common
causes of failure include:
- Oil contamination or sludge build-up
- Extended oil change intervals
- Internal wear of the tappet mechanism
- Loss of oil pressure retention
- Incorrect oil specification
Typical symptoms of failing tappets include:
- Ticking or tapping noises from the cylinder head
- Rough idle or hesitation
- Reduced engine efficiency
- Accelerated wear to camshafts and valves
Why Replace Worn Valve Lifters?
Replacing worn hydraulic tappets helps restore:
- Quiet, refined engine operation
- Accurate valve timing Improved drivability and efficiency
- Protection against further valvetrain damage
Ignoring tappet wear can result in costly repairs to camshafts, valves and cylinder heads—especially in hybrid engines where smooth operation is critical.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
95810542320
The product you are viewing cross references to these numbers
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- Porsche 911 1975-1977 3.0L Turbo (930)
- Porsche 911 1978-1989 3.3L Turbo (930)
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93
- Porsche 964 (911) TURBO 3.3L 1991-93
- Porsche 964 (911) TURBO 3.6L 1991-93
Rocker Arm - Sold Each
Not to be used with Performance Camshafts
The Porsche Rocker Arm is a critical valve train component
fitted to numerous Porsche 911 and Porsche 964 models produced between 1965 and
1994. As a key link between the camshaft and the engine valves, the rocker arm
converts camshaft movement into precise valve operation, ensuring accurate
opening and closing of the intake and exhaust valves throughout the engine's
operating range.
Fits:
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- Porsche 911 1975-1977 3.0L Turbo (930)
- Porsche 911 1978-1989 3.3L Turbo (930)
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93
- Porsche 964 (911) TURBO 3.3L 1991-93
- Porsche 964 (911) TURBO 3.6L 1991-93
Diagram Ref No 31
Porsche's air-cooled flat-six engines rely on precise valve train geometry to deliver their renowned performance, reliability, and responsiveness. A correctly functioning rocker arm helps maintain valve timing accuracy, efficient combustion, smooth engine operation, and long-term durability.
Whether you are rebuilding a classic Porsche engine, refurbishing cylinder heads, or restoring a high-mileage 911 or 964, replacing worn rocker arms is an important step in maintaining valve train performance and engine reliability.
What Does the Rocker Arm Do?
The rocker arm transfers movement from the camshaft to the engine valves.
Its primary functions include:
- Opening intake and exhaust valves at the correct time
- Maintaining accurate valve lift
- Supporting proper valve timing
- Transferring camshaft motion efficiently
- Helping ensure optimal combustion efficiency
- Maintaining smooth engine performance throughout the rev range
Because the rocker arm operates continuously whenever the engine is running, it is one of the most heavily loaded components within the valve train.
Why Does the Rocker Arm Fail?
Over time, rocker arms are subjected to constant mechanical stress, friction, heat, and vibration. This can lead to wear and deterioration, particularly in higher-mileage engines.
Common causes of rocker arm failure include:
- Wear on the rocker arm contact surfaces
- Excessive valve train loads
- Poor lubrication
- Contaminated engine oil
- High engine mileage
- Incorrect valve adjustments
- Excessive camshaft wear
- Metal fatigue from repeated operation
As wear develops, the rocker arm may lose its ability to maintain precise valve control, affecting engine performance and increasing wear on related components.
Common Symptoms of a Worn Rocker Arm
A failing rocker arm can cause:
- Excessive valve train noise
- Ticking or tapping sounds from the cylinder heads
- Reduced engine performance
- Rough idle Increased valve clearance variation
- Premature valve train wear
- Misfires or inconsistent combustion
- Difficulty maintaining correct valve adjustments
If left unaddressed, worn rocker arms can accelerate wear to camshafts, valves, and adjustment hardware.
When Should You Replace It?
Rocker arms should be carefully inspected whenever cylinder heads or valve train components are serviced.
Replacement is recommended:
- During complete engine rebuilds
- During cylinder head refurbishment
- If excessive wear is found on contact surfaces
- When valve train noise persists after adjustment
- If rocker arm bushings show wear
- During high-mileage restorations
- When replacing worn camshafts
- As preventative maintenance during major engine work
Many Porsche engine builders replace worn rocker arms as part of a complete valve train refresh to restore factory performance and reliability.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
93010504306
The product you are viewing cross references to these numbers
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- Porsche 911 1975-1977 3.0L Turbo (930)
- Porsche 911 1978-1989 3.3L Turbo (930)
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93
- Porsche 964 (911) TURBO 3.3L 1991-93
- Porsche 964 (911) TURBO 3.6L 1991-93
- Porsche 914 (1970-1976)
Rocker Arm Adjustment Screw
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The Porsche Rocker Arm Adjustment Screw is a
vital valve train component used on Porsche 911 and Porsche 964 models from
1965 to 1994. This precision-engineered adjuster screw allows accurate setting
of valve clearances, ensuring the correct relationship between the rocker arm
and valve stem for smooth engine operation and optimal performance.
Fits:
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- Porsche 911 1975-1977 3.0L Turbo (930)
- Porsche 911 1978-1989 3.3L Turbo (930)
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93
- Porsche 964 (911) TURBO 3.3L 1991-93
- Porsche 964 (911) TURBO 3.6L 1991-93
Diagram ref no 32
In Porsche's iconic air-cooled flat-six engines, valve clearance adjustment is a critical maintenance procedure. The rocker arm adjustment screw enables technicians to set valve lash precisely, helping maintain correct valve timing, efficient combustion, reduced valve train wear, and long-term engine reliability.
Whether you are carrying out a routine valve adjustment, rebuilding a cylinder head, or restoring a classic Porsche engine, replacing worn adjustment screws helps ensure accurate valve settings and dependable valve train operation.
What Does the Rocker Arm Adjustment Screw Do?
The rocker arm adjustment screw is used to establish and maintain the correct valve clearance between the rocker arm and the valve stem.
Its primary functions include:
- Allowing precise valve clearance adjustment
- Maintaining correct valve lash specifications
- Supporting accurate valve timing
- Reducing excessive valve train wear
- Ensuring smooth engine operation
- Helping maximise engine performance and efficiency
Correct valve clearance is essential on air-cooled Porsche engines, as thermal expansion during operation can significantly affect valve train geometry.
Why Does the Rocker Arm Adjustment Screw Fail?
Over time, the adjustment screw is subjected to constant mechanical loading, heat cycles, vibration, and repeated adjustment procedures.
Common causes of failure include:
- Wear on the adjustment tip
- Surface pitting or scoring
- Metal fatigue Excessive valve train loads
- Poor lubrication conditions
- Incorrect valve adjustment procedures
- Corrosion during long-term storage
- Damage caused during engine rebuilds or maintenance
As wear develops on the adjustment surface, maintaining accurate valve clearances becomes increasingly difficult.
Common Symptoms of a Worn Adjustment Screw
A worn or damaged rocker arm adjustment screw may cause:
- Excessive valve train noise
- Difficulty achieving correct valve clearance
- Frequent valve adjustment requirements
- Inconsistent valve lash measurements
- Reduced engine performance
- Increased wear on valve stems
- Rough running or poor idle quality
- Premature wear of related rocker arm components
In severe cases, excessive wear can affect valve timing accuracy and contribute to accelerated engine wear.
When Should You Replace It?
Replacement is recommended whenever wear is identified during inspection or engine servicing.
The adjustment screw should be replaced:
- During valve adjustment procedures if wear is found
- During cylinder head rebuilds
- During complete engine rebuilds
- When valve train components are being renewed
- If the adjustment tip is pitted or damaged
- When accurate valve clearance cannot be maintained
- During preventative restoration work
- On high-mileage engines showing valve train wear
Many Porsche engine specialists replace adjustment screws during major engine work to ensure consistent valve train geometry and long-term reliability
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90110537002
The product you are viewing cross references to these numbers
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- Porsche 911 1975-1977 3.0L Turbo (930)
- Porsche 911 1978-1989 3.3L Turbo (930)
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93
- Porsche 964 (911) TURBO 3.3L 1991-93
- Porsche 964 (911) TURBO 3.6L 1991-93
- Porsche 914 (1970-1976)
Note: Please do not exceed factory torque spec
Porsche 911 1965-89 18Nm
Porsche 914 1970-76 18Nm
Porsche 964 1989-94 20Nm
Fits:
Porsche 911 1965-89
Porsche 930 (911) 1975-89
Porsche 964 1989-94
Porsche 965 (964) Turbo 1989-94
Porsche 914-6 1970-76
Diagram Ref No 27
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90110534205
The product you are viewing cross references to these numbers