1700cc Piston Ring Set - 90mm Bore - Type 4 Engines

This replacement piston ring set is designed for standard 1700cc aircooled Type 4 engines using 90mm pistons. Correct piston ring sealing is essential for maintaining compression, controlling oil consumption, and ensuring efficient combustion. Worn or damaged rings can lead to loss of power, excessive oil burning, poor starting, and increased crankcase pressure.

These rings are manufactured to suit original-spec 90mm pistons as fitted to early Type 4 engines. Once installed, they restore proper sealing between the pistons and cylinder walls, helping to regain smooth running, strong compression, and reliable engine performance. They are ideal for use during engine rebuilds, top-end refreshes, or when replacing pistons and barrels.

Produced as a good-quality reproduction, these piston rings are designed to meet correct factory dimensions and clearances. The set includes all three rings per piston—two compression rings and one oil control ring—ensuring complete replacement across all four cylinders.

This set is supplied to service one complete engine and is suitable for multiple Type 4 engine codes fitted to Baywindow buses and Porsche 914 models.

Quality

• Good quality reproduction

Quantity

• Sold as a complete set for one engine

• Includes rings for 4 pistons

Specifications

• Piston diameter: 90mm

• Ring sizes (top to bottom):

  • 2mm compression ring

  • 2mm compression ring

  • 5mm oil control ring

Fitment

• Engine codes: CA, CB, W, EA, EW

Applications

• VW Baywindow Van: 1972 – 1973 (1700cc Type 4)

• VW Type 4 models: 1969 – 1974 (1700cc)

• Porsche 914: 1970 – 1973 (1700cc)