Cylinder head gasket for the Hahn & Sohn HDE20SS3-DW diesel generator

The cylinder head gasket is one of the engine's critical components — it ensures that the combustion chamber, cooling passages, and lubrication circuit remain safely separated from one another even under the high pressures and temperatures inside the engine. If the gasket loses its sealing function (typically after years of operation, engine overheating, or removal of the cylinder head during servicing), this may result in coolant leaking into the oil, loss of compression, or leakage of exhaust gases.

• This gasket is designed specifically for the four-cylinder WEICHAI WP2.3D25E200 diesel engine that powers the Hahn & Sohn HDE20SS3-DW generator (20 kW / 25 kVA). It features a multi-layer steel design (MLS) with precisely shaped openings for the cylinders, oil and coolant passages, and mounting holes — exactly matching the dimensions of the cylinder head, so it fits without modification.
• We recommend replacing the gasket every time the cylinder head is removed (even if the old gasket appears visually undamaged) — reusing a used gasket is risky and, in the event of leakage, may lead to significantly more expensive engine repairs.

WHY CUSTOMERS CHOOSE IT

• Exact match for the WEICHAI WP2.3D25E200 engine — no additional modifications required during installation
• Multi-layer steel design — greater resistance to thermal and mechanical stress than a conventional paper gasket
• Essential part for cylinder head servicing — without a high-quality gasket, there is a risk of repeated failure

PRACTICAL TIP

When installing a new cylinder head gasket, always tighten the cylinder head bolts gradually, in a cross pattern, and to the specified torque (according to the engine service documentation) — uneven or excessive tightening is one of the most common causes of premature damage even to a new gasket.

KEY FEATURES

• Type: cylinder head gasket
• Design: multi-layer steel (MLS)
• Number of engine cylinders: 4
• Designed for engine: WEICHAI WP2.3D25E200
• Compatible generator: Hahn & Sohn HDE20SS3-DW (20 kW / 25 kVA)
• Precisely shaped openings for cylinders, oil passages, and coolant passages

USE / INSTALLATION / OPERATION

1. Before removing the cylinder head, disconnect the generator from the power supply and allow the engine to cool completely.
2. Drain the coolant and oil according to the engine manufacturer's service procedure.
3. Remove the cylinder head according to the specified procedure (loosening the bolts in a cross pattern).
4. Remove the old gasket and clean the mating surfaces of the cylinder head and engine block of any remaining gasket material.
5. Install the new gasket in the correct orientation (according to the markings/openings) — do not use sealing compound unless specified by the engine manufacturer.
6. Tighten the cylinder head gradually and in a cross pattern to the specified torque.
7. Refill the coolant and oil, start the engine, and check for leaks.

We recommend entrusting the installation to someone experienced in servicing diesel engines.