Valve stem seals. Porsche 911 / 912 / 924S / 944 / 964 / 928 › 96410411107

OE Match valve stem seals control oil flow between the valve stems and guides. They are replacement sealing components for cylinder-head repairs and engine rebuilding work.

Supplied each.

Fits

• Porsche 911 1968-89 (12 Per Engine)
• Porsche 924S (8 Per Engine)
• Porsche 944 (8 Per Engine)
• Porsche 944 2.7L (8 Per Engine)
• Porsche 964 3.6L (12 Per Engine)
• Porsche 964 Turbo (12 Per Engine)
• Porsche 928 (16 Per Engine)
  
  Check fitment for your specific vehicle (model, year, engine) before ordering.
  
  Diagram ref no 19
  
  What Is This Part?

A valve stem seal is a small sealing component fitted around a valve stem at the valve guide in the cylinder head. It meters the oil reaching the sliding stem-to-guide contact, allowing lubrication while restricting excess oil from passing into the engine's gas passages. The seal works alongside the valve and guide, so their condition matters to successful sealing. During cylinder-head work, the seals should be assessed together with valve-stem and guide wear rather than treated as an isolated cure for oil consumption.

What Does This Part Do?

• Meters lubricating oil: Controls the amount of oil reaching the valve stem and guide contact.
• Restricts excess oil: Helps limit oil passing down the valve guide towards the inlet or exhaust passage.
• Seals around a moving stem: Maintains its sealing contact as the valve opens and closes.
  
  Why Replace This Part?

A damaged sealing lip or a seal that no longer seats correctly can allow too much oil past the valve guide. Replacement is appropriate when inspection identifies deterioration, damage or leakage at this point, including damage sustained during dismantling or installation.

Worn guides can allow excessive sideways valve movement and prevent a replacement seal from controlling oil correctly. Check guide clearance and valve-stem condition during repairs; fitting seals alone will not correct mechanical wear in those components.

When to Replace This Part?

• Visible damage: Replace a seal with a torn lip, cracking or other deterioration found during inspection.
• Poor seating: Investigate seals that are displaced or no longer retained correctly on the guide.
• Oil consumption or blue exhaust smoke: Inspect the seals and guides as possible causes, while checking other sources of oil burning.
• Valve-guide repairs: Assess the seals when valves or guides are removed and renew those damaged or unsuitable for refitting.
• Installation damage: Replace any seal whose lip has been cut or distorted while passing over the valve-stem grooves.
  
  Where Is This Part Fitted?

Location: In the cylinder head, around the valve stem at the upper end of the valve guide, within the valve-spring area.

FAQs

• Can I replace only the valve stem seals?
  Yes, if inspection confirms the seals are responsible and the valves and guides remain serviceable. Excessive guide clearance needs separate attention.
• Does exhaust smoke always mean these seals need replacing?
  No. Smoke and oil consumption can have several causes. Confirm the source before deciding on seal replacement or more extensive engine work.
• What matters during installation?
  Follow the engine-specific procedure, protect the sealing lip from the valve-stem grooves and use the appropriate fitting tool to seat the seal without damage.
  
  Product Summary

• Product: Valve stem seals.
• Brand: OE Match.
• Supply: Each.
• Purpose: Controls oil flow at the valve stem and guide.
• Repair context: Cylinder-head sealing repairs and engine rebuilding.