Cylinder kit, VW 90MM 1700cc Type 4. Porsche 914  ❭  VW9000T4L

90mm Cylinder Kit – Set of 4

Restore the performance and reliability of your classic Porsche engine with this 90mm Cylinder Kit, designed for 1700cc Volkswagen Type 4 engines fitted to the Porsche 914.
 
Fits:

• Porsche 914 (1970-1976)  

Manufactured to OE specifications, this high-quality cylinder kit provides an ideal replacement for worn or damaged original cylinders during an engine rebuild. Precision machined for excellent fitment and sealing, the cylinders are engineered to deliver reliable compression, efficient heat dissipation and long service life.

Whether you're rebuilding a tired engine or carrying out preventative maintenance, this OE Match cylinder kit offers dependable quality and factory-style performance.

What Do Engine Cylinders Do?

The cylinders form the combustion chambers in which the pistons travel, creating the compression needed for efficient engine operation.

Their primary functions include:

• Guiding piston movement
• Providing a durable wear surface
• Maintaining engine compression
• Dissipating combustion heat
• Supporting efficient engine performance and reliability

Correct cylinder condition is essential for maintaining power output, oil control and overall engine efficiency.

Why Do Engine Cylinders Wear Out?

Over many thousands of miles, continual piston movement and combustion gradually wear the cylinder bores.

Common causes of deterioration include:

• Normal engine wear
• Poor lubrication
• Overheating
• Dirt or debris entering the engine
• Piston or piston ring damage
• Corrosion during long-term storage

As wear increases, compression falls and oil consumption often rises, reducing engine performance.

When Should They Be Replaced?

Cylinder replacement is recommended if:

• Compression readings are low
• Cylinder bores are worn or scored
• Oil consumption increases significantly
• Excessive piston clearance is measured
• The engine is being completely rebuilt
• Heat damage or corrosion is present

Replacing worn cylinders during an engine rebuild restores compression, improves reliability and helps return the engine to its original performance.

Porsche 914 Type 4 Engine Components

The air-cooled Type 4 engine relies on accurately machined cylinders to maintain compression, control oil consumption and deliver reliable performance. As the engine accumulates mileage, cylinder wear becomes inevitable, leading to reduced power, increased oil usage and lower overall efficiency.

Replacing worn cylinders as part of a complete engine rebuild helps restore factory performance while ensuring long-term reliability. OE Match engine components are manufactured to OE standards, making them an excellent choice for classic Porsche restorations and routine engine overhauls.

Benefits of Replacing the Cylinder Kit

• Restores engine compression
• Improves power and efficiency
• Helps reduce oil consumption
• Precision OE-style fitment
• High-quality heat-resistant construction
• Ideal for complete engine rebuilds