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Your Vehicle // Porsche // 964 (911) (1989-1994) // 964 (911) TURBO 3.6L 1991-93
Camshafts
Fits:
Porsche 964 Turbo 3.6L 1993
only with 3.5L turbo engine type M64.50
Click 'Zoom in' for large parts diagram.
Diagram ref no 23
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
96410524820
The product you are viewing cross references to these numbers
- Porsche 964 (911) TURBO 3.6L 1991-93
Porsche camshaft Left, for the 930 Turbo and 964 Turbo. PART 1 of 3 - camshaft.
Fits
Porsche 911 & 912 (1975–1993) TURBO
Diagram ref no 42
Confirm the vehicle's model, production year and engine before ordering; use its VIN to establish the correct camshaft specification.
What This Product Does
Cam lobes determine valve lift and the duration of opening. Driven through the engine's timing mechanism, this shaft operates the left-bank valves in the required relationship to crankshaft rotation.
Functions
- Actuates left-bank valve gear.
- Determines valve-opening duration and lift.
- Coordinates valve events with crankshaft rotation through the timing drive.
Technical Details - Assembly row labels include PART 1 of 3 - camshaft, camshaft and PART 1 of 3 - camshaft with air injection.
- Quantity 1; this is an assembly requirement, not confirmation of kit contents.
- This fits TURBO cars.
Symptoms of Fault
- Unusual ticking or tapping around the valve gear.
- Uneven idle or misfiring that remains after fuel and ignition diagnosis.
- Scored, pitted or otherwise damaged lobe surfaces.
- Abnormal rocker wear or metal particles discovered in engine oil.
These findings require diagnosis; they do not establish camshaft failure by themselves.
Why Replacement Matters
Confirmed lobe damage can alter valve movement and justify renewal during top-end repair or overhaul. Establish the cause of wear before assembly, including oil supply and contamination. Inspect the associated chains, sprockets, guides, adjusters, rockers and fixings rather than assuming that replacing the shaft alone resolves the fault.
FAQs
Should rockers be checked during replacement?
Inspect their contact surfaces for wear and determine whether renewal is necessary before fitting.
Who should carry out installation?
An experienced Porsche engine technician should establish timing, check clearances and follow the applicable assembly procedure.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
93010514
The product you are viewing cross references to these numbers
- Porsche 911 1975-1977 3.0L Turbo (930)
- Porsche 911 1978-1989 3.3L Turbo (930)
- Porsche 964 (911) TURBO 3.3L 1991-93
- Porsche 964 (911) TURBO 3.6L 1991-93
Sold individually; fits left or right camshaft.
Fits:
Porsche 964 Carrera / RS 1989-94
Porsche 964 Turbo 3.6L 1993-94*
Porsche 993 Carrera / RS 1994-98
Porsche 993 Turbo / GT2 1995-98
Diagram ref. 1.
*NOTE: This o-ring is intended for later 3.6L 964 Turbo models and is not compatible with the earlier 3.3L engine.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99970731340
The product you are viewing cross references to these numbers
- 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 3.6L 1991-93
- Porsche 993 (911) C2 1994-97
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) RS 1994-97
- Porsche 993 (911) C2S 1994-97
- Porsche 993 (911) C4S 1994-97
- Porsche 993 (911) TURBO 1994-96
- Porsche 993 (911) GT2 1994-97
- Porsche 993 (911) TURBO S 1994-97
Precision-Engineered Camshafts – Performance, Reliability, and Power for Porsche Engines
Camshafts are the heartbeat of any Porsche engine, controlling the timing and lift of the intake and exhaust valves to ensure precise combustion and efficient power delivery. A well-tuned camshaft defines how your engine breathes, responds, and performs — whether it’s a daily-driven 911 or a track-focused GT model.
At Design911, we supply a complete range of high-quality and performance-grade camshafts engineered to meet or exceed manufacturer specifications. Each camshaft is precision-machined for exact tolerances, ensuring smooth valve operation, consistent timing, and optimal performance across all driving conditions.
What Do Camshafts Do?
Camshafts regulate how air and fuel enter and exit the combustion chamber. By controlling valve timing, lift, and duration, they play a crucial role in engine power and efficiency.
Core Functions:
- Control
valve timing for optimal engine breathing.
- Determine
power characteristics, from low-end torque to high-rpm performance.
- Synchronise
intake and exhaust cycles for smoother operation.
- Enhance efficiency, combustion stability, and throttle response.
High-performance camshafts are often tuned to deliver sharper throttle response, higher power output, and improved torque delivery for modified or rebuilt engines.
Why Do Camshafts Fail?
Even with Porsche’s engineering excellence, camshafts are
subject to wear over time. Common causes of camshaft failure include:
- Oil
starvation leading to friction and surface wear.
- Excessive
heat or poor lubrication degrading cam lobes.
- Improper
timing belt/chain tension causing misalignment or damage.
- Mechanical
fatigue due to extended mileage or racing conditions.
- Contaminated oil introducing abrasive particles into the valvetrain.
A worn or damaged camshaft can cause loss of power, misfires, rough idle, and reduced engine efficiency — making timely replacement essential to restore peak performance.
Why Replace with Performance-Grade Camshafts?
Replacing worn components with precision-engineered camshafts restores engine reliability and maximises output. Upgraded camshafts can also provide noticeable gains in horsepower and responsiveness.
Key Benefits:
- Restores
valve timing accuracy and smooth engine operation.
- Increases
power and torque, especially in performance-tuned engines.
- Improves
fuel combustion efficiency for cleaner running.
- Ensures
long-term reliability with precision-machined surfaces and premium
materials.
- Perfect fitment with no modification required on compatible Porsche engines.
Whether maintaining a classic flat-six or upgrading a modern turbocharged engine, these camshafts are designed to deliver manufacturer-level precision with motorsport-grade durability.
Highlights:
- Precision-engineered
camshafts for Porsche models old and new.
- Enhanced
performance and reliability, meeting manufacturer standards.
- Motorsport-grade
construction ensures durability under extreme loads.
- Improved
airflow and combustion efficiency for optimal power delivery.
- Ideal for restorations, rebuilds, and performance tuning projects.
- Designed for seamless compatibility with Porsche flat-six, turbo, and hybrid engines.