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Cam lifter set. Porsche 356/912 - WC-NL-174
WC-NL-174
Vehicle Group
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 356 1950-55
- Porsche 356A 1955-59
- Porsche 356B 1959-63
- Porsche 356C 1963-65
Information
Set Of Web Cam Lifters.
Restore dependable valve-train operation and provide the correct working interface for a compatible camshaft with this OE Match Set of Web Cam Lifters, reference WC-NL-174. Designed for use in compatible engine builds, these lifters—also known as cam followers or tappets—transfer the movement of the camshaft through the valve train, allowing the intake and exhaust valves to open and close correctly.
Fits:
Porsche 356 / 912
Lifters operate directly against the camshaft lobes and are subjected to continuous mechanical loading, friction, and high engine temperatures. Their condition and compatibility with the camshaft are therefore critical to valve-train reliability. A correctly matched lifter maintains consistent contact with the cam lobe, helping preserve the intended camshaft profile and accurate valve operation.
What This Product Does:
Symptoms Of Wear Or Failure:
Why Replacement Matters:
Restore dependable valve-train operation and provide the correct working interface for a compatible camshaft with this OE Match Set of Web Cam Lifters, reference WC-NL-174. Designed for use in compatible engine builds, these lifters—also known as cam followers or tappets—transfer the movement of the camshaft through the valve train, allowing the intake and exhaust valves to open and close correctly.
Fits:
Porsche 356 / 912
Lifters operate directly against the camshaft lobes and are subjected to continuous mechanical loading, friction, and high engine temperatures. Their condition and compatibility with the camshaft are therefore critical to valve-train reliability. A correctly matched lifter maintains consistent contact with the cam lobe, helping preserve the intended camshaft profile and accurate valve operation.
What This Product Does:
- Follows the profile of the rotating camshaft lobes.
- Transfers camshaft movement through the valve train.
- Helps control the opening and closing of the intake and exhaust valves.
- Supports correct valve lift and timing.
- Provides a critical contact surface between the camshaft and valve train.
- Helps maintain consistent valve-train operation.
- Supports smooth and dependable engine performance.
- Replaces worn, pitted, scored, or damaged lifters.
- Provides a suitable solution for compatible engine rebuilds and camshaft installations.
Symptoms Of Wear Or Failure:
- Ticking, tapping, or clicking from the valve train.
- Increasing valve-train noise with engine speed.
- Difficulty maintaining correct valve clearances.
- Repeated changes in valve adjustment.
- Reduced engine power or performance.
- Rough or inconsistent engine operation.
- Reduced valve lift due to component wear.
- Pitting or scoring on the lifter faces.
- Concave or uneven wear on the lifter contact surfaces.
- Visible wear or damage to corresponding camshaft lobes.
- Metallic particles in the engine oil.
- Abnormal lifter wear discovered during engine disassembly.
Why Replacement Matters:
- Lifters are critical to both valve operation and camshaft durability. The camshaft and lifter contact surfaces operate together under substantial mechanical pressure, and excessive wear to either component can alter the intended valve lift and timing.
- A worn, pitted, or incorrectly matched lifter may damage the corresponding camshaft lobe. As the surfaces deteriorate, metal particles can enter the engine oil and circulate through the lubrication system, potentially contributing to further internal engine wear.
- A badly worn lifter or cam lobe can also reduce valve lift, affecting cylinder filling and exhaust gas flow. This may result in reduced performance, rough running, and inefficient combustion.
- Correct installation is particularly important when fitting replacement lifters. The condition of the camshaft must be inspected carefully, and the lifters must be compatible with the specific camshaft being used. Installing new lifters against an unsuitable or severely worn camshaft may result in rapid wear and premature failure.
- Replacing worn or unsuitable components with the correct OE Match Web Cam Lifters WC-NL-174 helps restore consistent valve-train movement, correct camshaft operation, and dependable engine performance when correctly matched and installed.
Price: £264.28
Delayed delivery
Related products
Vehicle Group
- 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)
Information
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
12213
90110537002
901.105.370.02
12213
911031-01
The product you are viewing cross references to these numbers
Price: £16.00
In stock
Vehicle Group
- 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)
Information
Rocker Shaft.
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:
Symptoms Of Wear Or Failure:
Why Replacement Matters:
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90110534205
The product you are viewing cross references to these numbers
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
90110534204
90110534205
The product you are viewing cross references to these numbers
Price: £16.00
In stock
Vehicle Group
- 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)
Information
Rocker arm shaft seal
The rocker arm shaft seal helps prevent engine oil leakage around the rocker arm shaft bore. A good seal supports correct valve train lubrication retention, reduces oil seepage from the camshaft housing area, and helps keep the engine clean and properly sealed.
Sold individually, 24 required per vehicle
Fits:
Porsche 911 1965 - 1989
Porsche 930 Turbo 1974 - 1989
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.
This OE Match rocker arm shaft seal is designed to match the original-style fitment and help seal the rocker arm shaft area within the valve train assembly.
Functions
• Replaces the rocker arm shaft seal
• Helps seal the rocker arm shaft area
• Helps prevent oil leaks from the camshaft housing / rocker area
• Supports correct valve train oil control
• Suitable for rocker arm shaft removal, refitting, or engine resealing
• Replaces hardened, flattened, split, missing, or leaking original seals
• OE Match replacement for classic Porsche engine repair and restoration.
Why Replace This Part?
Rocker arm shaft seals can harden, flatten, crack, split, or lose sealing ability due to heat, oil exposure, age, and repeated engine service. A worn or missing seal can allow oil to seep from the rocker shaft area, causing oil staining, drips, burning oil smells, or contamination around the camshaft housing. Replacing the seal helps restore a clean and reliable engine oil seal.
When to Replace This Part
• Oil leaks are visible around the rocker arm shaft area
• The rocker arm shafts have been removed or adjusted
• Camshaft housing or valve train service is being carried out
• The original seal is hard, split, flattened, or missing
• Engine oil seepage is present after previous repairs
• The engine is being rebuilt, resealed, or restored
• Preventative replacement is being carried out during top-end service.
Where it fits on the car
This seal fits at the rocker arm shaft / camshaft housing area on Porsche 911, 930, 964, and 914-6 engines. It forms part of the upper engine valve train sealing system.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91109910352
The product you are viewing cross references to these numbers
The rocker arm shaft seal helps prevent engine oil leakage around the rocker arm shaft bore. A good seal supports correct valve train lubrication retention, reduces oil seepage from the camshaft housing area, and helps keep the engine clean and properly sealed.
Sold individually, 24 required per vehicle
Fits:
Porsche 911 1965 - 1989
Porsche 930 Turbo 1974 - 1989
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.
This OE Match rocker arm shaft seal is designed to match the original-style fitment and help seal the rocker arm shaft area within the valve train assembly.
Functions
• Replaces the rocker arm shaft seal
• Helps seal the rocker arm shaft area
• Helps prevent oil leaks from the camshaft housing / rocker area
• Supports correct valve train oil control
• Suitable for rocker arm shaft removal, refitting, or engine resealing
• Replaces hardened, flattened, split, missing, or leaking original seals
• OE Match replacement for classic Porsche engine repair and restoration.
Why Replace This Part?
Rocker arm shaft seals can harden, flatten, crack, split, or lose sealing ability due to heat, oil exposure, age, and repeated engine service. A worn or missing seal can allow oil to seep from the rocker shaft area, causing oil staining, drips, burning oil smells, or contamination around the camshaft housing. Replacing the seal helps restore a clean and reliable engine oil seal.
When to Replace This Part
• Oil leaks are visible around the rocker arm shaft area
• The rocker arm shafts have been removed or adjusted
• Camshaft housing or valve train service is being carried out
• The original seal is hard, split, flattened, or missing
• Engine oil seepage is present after previous repairs
• The engine is being rebuilt, resealed, or restored
• Preventative replacement is being carried out during top-end service.
Where it fits on the car
This seal fits at the rocker arm shaft / camshaft housing area on Porsche 911, 930, 964, and 914-6 engines. It forms part of the upper engine valve train sealing system.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91109910352
91109910352
The product you are viewing cross references to these numbers
Price: £2.07
In stock