do not press the back button…
Enter your VAT number here and click Verify:
Your details have been verified. VAT number registered to:
,
.
Your order will now be zero rated for VAT purposes. We reserve the right to verify these details after your order request has been made and reinstate VAT if required.
Your VAT details were not recognised or were invalid. Your VAT number must be matched to your Billing Country as specified above. This is currently specified as . You do not need to enter the country code part of your VAT number as this has already been selected in your billing address details above.
The VAT number checking service is currently offline. Please supply your VAT details within the comments or special instructions field below and we will apply a VAT discount after placing your order request.
- Porsche 957 Cayenne 3.0L Diesel 2007-10
- Porsche 958 Cayenne V6 3.0L Diesel (245Hp) 2010-17
- Porsche 958 Cayenne S V8 4.2L Diesel (382Hp) 2010-17
- Porsche 970.1 Panamera Diesel V6 3.0L 2011-13
- Porsche 970.2 Panamera Diesel V6 3.0L (250Hp) 2014-16
- Porsche 971.1 Panamera 4S Diesel V8 4.0L 4WD (422 Hp) 2017-18
- Porsche 971.1 Panamera 4S Diesel 4.0L Twin-Turbo V8 Sport Turismo 2017-18
- Porsche 95B.1 Macan S Diesel 3.0L V6 (258Bhp) 2014-18
Diesel Engine Hydraulic Tappet / Valve Lifter
Sold each
This engine hydraulic tappet (also known as a hydraulic valve
lifter) is a precision component used in Porsche diesel engines to
maintain correct valve clearance automatically. By using engine oil pressure,
the tappet ensures smooth valve operation, quiet running and consistent
performance across all driving conditions.
Fits:
- Porsche 957 Cayenne 3.0L Diesel 2007-10
- Porsche 958 Cayenne V6 3.0L Diesel 245HP 2010-17
- Porsche 958 Cayenne S V8 4.2L Diesel 382HP 2010-17
- Porsche 970.1 Panamera Diesel V6 3.0L 2011-13
- Porsche 970.2 Panamera Diesel V6 3.0L (250Hp) 2014-16
- Porsche 971.1 Panamera 4S Diesel V8 4.0L 4WD (422 Hp) 2017-18
- Porsche 971.1 Panamera 4S Diesel 4.0L Twin-Turbo V8 Sport Turismo 2017-18
- Porsche 95B.1 Macan S Diesel 3.0L V6 258Bhp 2014-18
Diagram ref no 11
In modern Porsche diesel engines, hydraulic tappets play a crucial role in durability, refinement and emissions control—making them an essential service and repair component.
What Does an Engine Hydraulic Tappet Do?
Hydraulic tappets sit between the camshaft and valves, using oil
pressure to compensate for thermal expansion and component wear. This allows
the valve train to operate with:
- Correct valve timing and lift
- Reduced mechanical noise
- Improved combustion efficiency
- Lower internal engine wear
By automatically adjusting clearance, hydraulic tappets eliminate the need for manual valve adjustment and help maintain optimal engine performance throughout the rev range.
Why Do Hydraulic Tappets Fail on Porsche Diesel Engines?
Over time, hydraulic tappets are subject to heat, oil contamination
and mechanical stress, particularly in high-torque diesel engines.
Common
causes of failure include:
- Oil sludge or poor lubrication
- Wear to internal check valves
- Loss of hydraulic pressure retention
- Extended oil change intervals
- Contaminated or incorrect oil grades
Symptoms of worn or failing tappets may include:
Ticking or tapping noises from the cylinder head Rough idle or misfiring Reduced engine efficiency Increased valve train wearWhy Replace Worn Hydraulic Tappets?
Replacing worn hydraulic tappets restores:
- Quiet and smooth engine operation
- Correct valve timing and combustion
- Reduced wear on camshafts and valves
- Long-term engine reliability
Ignoring tappet wear can lead to accelerated damage to the camshaft and valve train, resulting in significantly higher repair costs.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
958109521
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
Sold each
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)
The OE Match Rocker Shaft is a premium-quality replacement valvetrain component designed to provide a precision mounting and pivot point for the engine's rocker arm assembly on compatible Porsche engines. Manufactured to OE specifications for fit, hardness and durability, the rocker shaft ensures smooth rocker arm movement, accurate valve operation and reliable engine 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
- Porsche 914 (1970-1976)
Diagram Ref No 7
Manufactured from high-strength, precision-machined hardened steel, the rocker shaft is engineered to withstand constant mechanical loading, high engine temperatures and continuous lubrication. Its precision-ground surface minimises friction and wear between the shaft and rocker arm, ensuring accurate valve actuation throughout the engine's operating range. Designed for direct OE-style fitment, it is ideal for engine rebuilds, maintenance or replacing worn original components.
What This Product Does:
- Provides the pivot point for the rocker arm assembly.
- Supports accurate opening and closing of the engine valves.
- Maintains correct valvetrain geometry.
- Reduces friction between the rocker arm and shaft.
- Ensures smooth and consistent valve operation.
- Helps maintain precise valve timing and engine performance.
- Supports long-term durability of the valvetrain.
- Forms an essential part of the engine's valve train assembly.
Symptoms Of Wear Or Failure:
- Tapping or ticking noises from the cylinder head.
- Excessive rocker arm play.
- Accelerated rocker arm wear.
- Uneven valve operation.
- Reduced engine performance.
- Rough idle.
- Increased valvetrain noise during acceleration.
- Visible scoring or wear on the shaft surface.
- Engine oil leaks around the rocker shaft area where applicable.
- Premature wear of associated valvetrain components.
Why Replacement Matters:
- The rocker shaft is subjected to continuous contact with the rocker arms while operating under high engine loads, elevated temperatures and constant lubrication. Over time, the shaft surface can wear, become scored or develop excessive clearance, affecting the accuracy of valve movement and increasing valvetrain noise.
- A worn rocker shaft can accelerate wear of the rocker arms and valve train components, resulting in reduced engine efficiency, increased mechanical noise and compromised valve timing. If left unattended, excessive wear may lead to more extensive engine repairs during future maintenance or rebuilds.
- Replacing a worn rocker shaft restores precise rocker arm operation, correct valve geometry and smooth engine performance. The OE Match replacement provides factory-style fitment, precision-machined hardened steel construction and exceptional durability, helping maintain reliable valve operation, engine efficiency and the long-term performance expected from your Porsche.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90110534205
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) TURBO 3.6L 1991-93
- Porsche 914 (1970-1976)
24 required. Priced each.
Fits:
Porsche 911 1965-89
Porsche 930 Turbo 1974-89
Porsche 914-6 1970-72
Porsche 964 C2 / C4 1989-1994
Porsche 964 Carrera RS 3.6L 1992
Porsche 964 Turbo 3.6L 1993-94
Fits to number 25 on diagram.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91109910352
The product you are viewing cross references to these numbers