Valve stem seal – Hahn & Sohn HDE20SS3-DW

The valve stem seal is a small but functionally important component — a metal housing with a rubber sealing element inside that fits onto the valve guide in the cylinder head. The valve stem passes through it and the seal wipes away excess oil to prevent it from entering the combustion chamber. A worn or damaged seal is indicated by blue smoke from the exhaust and increased oil consumption.

• The part is designed for the four-cylinder diesel engine WEICHAI WP2.3D25E200 (Hahn & Sohn HDE20SS3-DW generator, 20 kW / 25 kVA). During a complete cylinder head overhaul, these seals are always replaced as a set for all valves.

WHY CUSTOMERS CHOOSE IT

• Exact match for the WEICHAI WP2.3D25E200 engine
• Essential part for a complete cylinder head overhaul

PRACTICAL TIP

When installing the valve stem seal, make sure that the rubber sealing element is not damaged by the edge of the valve stem during insertion — use a suitable installation tool and lightly lubricate the seal with oil.

KEY FEATURES

• Type: valve stem seal (metal housing with rubber sealing element)
• Location: valve guide in the cylinder head
• Designed for engine: WEICHAI WP2.3D25E200
• Compatible generator: Hahn & Sohn HDE20SS3-DW (20 kW / 25 kVA)

USE / INSTALLATION / OPERATION

1. Remove the cylinder head and valve train according to the service procedure.
2. Remove the valve and the old seal from the guide.
3. Lightly lubricate the new seal with oil and fit it onto the valve guide using a suitable installation tool — evenly, without tilting.
4. Insert the valve again and check that the seal was not damaged during installation.

Installation requires experience with valve train servicing.