Valve Spring - Type 4 Engines

This replacement valve spring is designed for all Volkswagen Type 4 air-cooled engines in 1700cc, 1800cc, and 2000cc configurations, as fitted to Baywindow Buses and air-cooled Type 25 (T3) Buses. It is a direct replacement for the original valve springs and is suitable for both inlet and exhaust valve positions on standard engines.

The valve spring’s function is to close the valve after it has been opened by the camshaft and keep it seated firmly against the valve seat during engine operation. Correct spring tension is essential for maintaining accurate valve timing, preventing valve float at higher engine speeds, and ensuring reliable compression. Weak or broken valve springs can cause poor engine performance, misfiring, loss of power, and potential internal engine damage.

Manufactured to meet original specifications, this valve spring provides the correct balance of tension and durability for standard Type 4 engines. It is ideal for cylinder head rebuilds, valve train servicing, or replacement of fatigued original springs during engine maintenance.

These valve springs are sold individually, with eight required per engine.

Vehicle & Engine Fitment

• VW T2 Baywindow Bus – Type 4 1700cc, 1800cc, 2000cc (1973–1979)

• VW Type 25 / T3 Bus – Air-cooled Type 4 engines (1979–1983)

Key Features

• Direct replacement valve spring for Type 4 engines

• Suitable for inlet and exhaust valves

• Maintains correct valve seating and timing

• Helps prevent valve float and misfires

• Ideal for rebuilds and routine maintenance

Quantity Information

• Sold each

• 8 valve springs required per engine

Recommended Associated Parts

• Valve spring retainers

• Valve collets (keepers)

• Valve stem seals (where applicable)

• Inlet and exhaust valves