Valve stem sealant (cylinder head installed) - replace — VW
Valve stem sealant (cylinder head installed) - replace on VW: 35 steps, engines CNXA, CWSA. What to remove, in what order, and what to check after.
Workshop procedure for VW — the exact step sequence and torque figures, straight from real workshop data.
🧭 Before you start
Fits: platform codes 5U3, 5UC, 5UB
Don't miss
- Make sure the rockers and support elements are not mixed up.
- Risk of damages when assembling valve stem seals — Place the plastic sleeve (A) provided with the new valve stem seals (B) in the respective valve stem. This procedure avoids damage to the new valve stem seal lip.
📋 Procedure
- Remove the engine cylinder head cover with exhaust and inlet camshafts .
- Remove the rockers together with the support elements and place them on a clean surface.
- Make sure the rockers and support elements are not mixed up.
- Remove the Spark plugsQ with the Spark plug wrench3122B.
- Remove the Locating pin T10340 from over the cylinder block.
- Place the piston of the respective cylinder in the "“Lower Dead Centre”"position.
- Attach the PlateVAS 5161/32 through the BoltsVAS 5161/12, in the engine cylinder head.
- Manually install the AdaptorVAS40012 or Flexible tube VW 653/2A (VWB) - ou - VW 653/3 in the Spark plug Qmounting.
- Connect the AdaptorVAS40012 or Flexible tube VW 653/2A (VWB) - ou - VW 653/3 with compressed air.
- Insert the DriftVAS5161/3A in the PlateVAS5161/32 and release "“caught”" valve cotters by hitting them with a plastic hammer.
- Attach the SupportVAS 5161/6 with the FuseVAS 5161/5 in the PlateVAS 5161/32, as illustrated in the figure.
- Install the SleeveVAS 5161/32-2 along with the CompressorVAS 5161/32-1 and the LeverVAS 5161/2 in the PlateVAS 5161/32.
- Anchor the LeverVAS 5161/2 in the SupportVAS 5161/6 and press the CompressorVAS 5161/32-1 downwards.
- Simultaneously turn the knurled bolt of the CompressorVAS 5161/32-1 towards the right, until the tips fit the valve cotters.
- Slightly move the knurled bolt, turning it to the left and right, separating the valve cotters and inserting them in the CompressorVAS 5161/32-1.
- Lift and remove the LeverVAS 5161/2.
- Remove the CompressorVAS 5161/32-1.
- Remove the PlateVAS 5161/32.
- Remove the valve spring and head.
- Remove the valve stem seal with the Valve stem sealing pliersVAS 6770.
- ⚠ Risk of damages when assembling valve stem seals — Place the plastic sleeve (A) provided with the new valve stem seals (B) in the respective valve stem. This procedure avoids damage to the new valve stem seal lip.
- Slightly lubricate the valve stem sealing lip.
- Install the valve stem seal in the plastic sleeve.
- Carefully fit the valve stem seal with the Seal fitter3365 in the valve guide.
- Remove the plastic sleeve.
- Press the CompressorVAS 5161/32-1 from upwards to downwards over the Insertion deviceVAS 5161/32-3 and collect the valve cotters.
- Install the valve spring and respective plate; valve spring installation position
- Install the PlateVAS 5161/32 through the BoltsVAS 5161/12, in the engine cylinder head.
- Attach the SupportVAS 5161/6 with the FuseVAS 5161/5 in the PlateVAS 5161/32, as illustrated in the figure.
- Install the SleeveVAS 5161/32-2 along with the CompressorVAS 5161/32-1 and the LeverVAS 5161/2 in the PlateVAS 5161/32.
- Anchor the LeverVAS 5161/2 in the SupportVAS 5161/6 and press the CompressorVAS 5161/32-1 downwards.
- Pull the knurled bolt of the CompressorVAS 5161/32-1 upwards, turning it left and right. This allows installing the valve cotters.
- Relieve pressure in the LeverVAS 5161/2 while the knurled bolt is still pulled.
- Repeat this procedure for each valve.
- Install the cylinder head cover .
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- Removing engine · 41 torque figures
- Removing and installing camshaft – VW Golf Cabriolet · 47 torque figures
- Adjusting valve timing – VW Passat B5 · 83 torque figures
- Removing and installing camshafts – VW Passat B6 · 39 torque figures
- Removing and installing coolant pump · 53 torque figures
Who makes these pages, and how
TorqFix was built by a mechanic — after a 2,700 km drive with five roadside repairs that no diagnostic tool could explain.
The figures on this page come from manufacturer workshop documentation and are shown as they are. The page is assembled automatically from that data — it is not written by an AI. The AI works in the chat, where it answers for your specific car. It writes nothing here.
Variants of the same model differ. Cross-check torque against the factory manual for your engine before final tightening.
Seen a figure that does not match your manual? Write to us — we correct it and note when. support@torqfix.com
The story behind TorqFix →Workshop data on this page last updated 20 Sep 2026.