Camshaft housing Genuine Porsche part 93010502109

Timing Chain Tensioner. Standard type not the upgrade type.
The genuine Porsche 93010505304 Timing Chain Tensioner is the original mechanical unit used in early air-cooled 911 and 930 engines. Precisely engineered by Porsche, it maintains consistent tension in the timing chain, ensuring smooth, accurate cam timing and quiet operation. Built with precision-machined internal components and corrosion-resistant materials, this OEM tensioner guarantees reliability and performance identical to factory assembly standards — perfect for concours restorations and authentic rebuilds.
Sold each. Fits Left or Right Side

Fits:
Porsche 911 1968 - 1983
Porsche 930 Turbo

Diagram ref no 10

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93010505304

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Chain tensioner.
Fits Left or Right Side



Fits:
Porsche 911 1984-89 3.2L
Porsche 930 Turbo 1984-89
Porsche 964 Turbo 3.3L

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93010505803

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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.

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93010504306

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Chain tensioner repair kit Porsche 911 65-83 / 914 for 93010504900 & 93010505300 non-hydraulic Tensioners

One kit required per tensioner



Fits:
Porsche 911 1965-83
Porsche 914

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91110590101

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Chain case.



Fits:
Porsche 911 1974-89*
Porsche 930 Turbo 1975-89
Porsche 914-6 1970-76
Porsche 964 Turbo 3.0L 1991-92 (M30.69)

Please note:
*For 911's 85-88 with 930.26 Engines use also longer stud M8x65: 99906204602 (QTY 2) for LEFT chain case

Click 'Zoom in' for large parts diagram.
Diagram ref no: 1 (LEFT) / 2 (RIGHT)

Price is for each.

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93010506

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Intermediate Shaft. Size 0



Fits:
Porsche 911 65-89
Porsche 914-6
Porsche 964 Turbo 3.3L

Click 'Zoom in' for large parts diagram.
Diagram ref no 43

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93010501304

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Replacement tensioner support shaft located inside timing chain case. Position: Right.



Fits:
Porsche 911 1965-89
Porsche 930 Turbo 1978-79
Porsche 914 1970-71

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930105060S

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Mechanical chain tensioners, Set of 2 for Porsche 911



Use these specially designed and fabricated mechanical tensioners to set cam timing, or as a bullet-proof alternative to pressure fed or hydraulic tensioners for racing.
CNC machined from 6061 aluminum and anodized for protection, these will become an integral part of your tool box or race engine. Complete with tensioning bolts, locking nuts, and spacers.

Comes in a set of TWO.

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SR011

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Intermediate shaft gear - Size 0

Fits:
Porsche 911 1970-89
Porsche 911 Turbo 1975-89
Porsche 965 Turbo 3.3L 1991-94
Porsche 914-6 1970-76

Matching intermediate shaft and crankcase SEE
Checking and installing intermediate shaft SEE

Fits to number 27 on diagram.

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93010513600

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