Type 25 Cylinder Head Gasket (2 Notch) - 1700cc Diesel Engines (KY Engine Code)

This “2 notch” cylinder head gasket is designed for 1700cc diesel engines with engine code KY, as fitted to Volkswagen Type 25 / T3 buses. The head gasket plays a vital role in sealing the combustion chambers, oil galleries, and coolant passages between the cylinder head and engine block, ensuring correct compression and reliable engine operation.

On VW diesel engines, gasket thickness is selected based on measured piston protrusion above the block. This gasket is 1.57 mm thick and is intended for engines with piston projection between 0.91 mm and 1.00 mm. Selecting the correct notch specification is essential to maintain the correct compression ratio and to avoid premature gasket failure or internal engine damage.

The term “2 notch” (or “2 hole”) refers to the two small identification holes stamped into the lower front left corner of the gasket. This marking allows quick and accurate visual confirmation before installation.

Technical details

• Engine type: 1.7 Diesel

• Engine code: KY

• Gasket thickness: 1.57 mm

• Piston protrusion range: 0.91–1.00 mm

• Identification: 2 notch / 2 hole

• Quality: Good quality replacement

Related parts to consider

• New cylinder head bolts (stretch bolts – always replace)

• Injector heat shields

• Rocker cover gasket

• Timing belt and tensioner (recommended when the head is removed)

Alternative gasket sizes

• 1 notch / 1 hole: 033103383K

• 3 notch / 3 hole: 033103383M

Vehicle Fitment Summary

Volkswagen Type 25 / T3

• 1.7 Diesel KY: 1985–1992