025-198-151A VW Vanagon Piston Ring Set 1.75x2x3.5 (94) - 2.1L Wasserboxer

Piston Ring Set – 025-198-151A

The 025-198-151A is a complete piston ring set specifically engineered for the Volkswagen Vanagon equipped with the 2.1L Wasserboxer engine. This set provides all the necessary rings for a single piston, including the top compression ring, the second compression/scraper ring, and the oil control ring assembly. Maintaining a perfect seal between the piston and the cylinder wall is critical for the Wasserboxer, as it ensures maximum compression, reduces oil consumption, and prevents blow-by gases from contaminating the crankcase.

These rings are manufactured to precise tolerances to match the original factory specifications for the 94mm bore found in the 2.1L engine. Whether you are performing a top-end refresh or a complete engine overhaul, using high-quality rings like the 025-198-151A is essential for restoring the power and efficiency of your van while ensuring the long-term durability of the internal engine components.

Detailed Vehicle Compatibility

Fits 2.1L Wasserboxer engines with 94mm pistons.

VW Vanagon (2.1L):

• 1986, 1987, 1988, 1989, 1990, 1991

Engine Fitment Codes:

• MV: 2.1L

• SS: 2.1L

• DJ: 2.1L

Product Highlights & Features

• Complete Set for One Piston: Includes the upper compression ring, middle scraper ring, and the three-piece oil control ring.

• Precision Tension: Designed to provide the exact amount of wall tension required to seal the 94mm bore without causing excessive friction or wear.

• High-Grade Materials: Features specialized coatings and metallurgy to withstand the high heat and combustion pressures unique to the Wasserboxer design.

• Restores Performance: Eliminates oil burning and restores factory-spec compression for better fuel economy and smoother idling.

Technical Specifications

• Part Number: 025-198-151A

• Bore Size: 94.00mm (Standard)

• Ring Thickness: 1.75mm (Top) / 2.0mm (Middle) / 3.5mm (Oil)

• Application: Engine Internal / Piston Assembly

Installation & Maintenance Tips

• Measure Ring Gap: Before installation, always "square" each ring in the cylinder bore and measure the end gap with a feeler gauge to ensure it falls within the factory service limits.

• Orientation Matters: Pay close attention to the "TOP" markings on the compression rings. Installing a ring upside down will cause the engine to pump oil into the combustion chamber.

• Ring Staggering: Ensure the gaps of the rings are staggered around the piston (usually 120 degrees apart) according to the Bentley manual to prevent a direct path for compression loss.

• Cylinder Prep: When installing new rings, the cylinder walls should be lightly honed to create a "cross-hatch" pattern. This allows the new rings to seat properly and creates a long-lasting seal.

025198151A

P1671