Engine cylinder head intake valve. Porsche 911 S 1969 › 90110541100

Intake Valve
Sold each – 6 required per car

Maintain efficient engine breathing and correct cylinder compression with this OE Match replacement intake valve.

Fits:

• Porsche 911 S 1969

Located within the cylinder head, the intake valve controls the flow of fresh air and fuel mixture into the combustion chamber. It provides a secure seal when closed, helping maintain efficient combustion and reliable engine performance.

An aftermarket alternative to the original Porsche component, suitable for cylinder head repairs and classic engine rebuilds.

What Does It Do?

The intake valve opens to allow the air and fuel mixture into the combustion chamber during the engine's intake stroke.

It then closes to seal the cylinder during compression and combustion, helping the engine produce consistent power.

Why Is It Important?

A properly sealing intake valve is essential for efficient combustion and engine performance.

A worn or damaged valve may cause:

• Reduced cylinder compression
• Rough idling or misfires
• Loss of engine power
• Poor acceleration Increased fuel consumption

These symptoms may also indicate other engine problems.

Why Do Intake Valves Fail?

Repeated heat cycles and mechanical operation can gradually wear the valve and its sealing surfaces.

Common causes include:

• Worn or pitted valve faces
• Carbon deposits affecting valve seating
• Excessive valve guide wear
• Incorrect valve clearance
• Overheating or mechanical damage

When Should It Be Replaced?

Replace the intake valve if it is bent, cracked, burnt or excessively worn.

Replacement may also be necessary during a cylinder head rebuild when the valve can no longer provide an effective seal.

Installation Notes

Installation should be carried out by an experienced Porsche engine specialist.

Inspect the valve guides, seats, springs and associated components before fitting. Check valve sealing and adjust clearances according to Porsche specifications.

Key Features

• OE Match aftermarket replacement intake valve
• Suitable for Porsche 911 S 2.0L – 1969
• Controls intake mixture entering the combustion chamber
• Helps maintain correct cylinder compression
• Suitable for cylinder head servicing and engine rebuilds
• Replaces worn, bent or damaged original valves
• Alternative to a Genuine Porsche replacement
• Sold individually – 6 required per engine

Inlet Valves & Cylinder Head Components

The 1969 Porsche 911 S 2.0L air-cooled flat-six engine relies on correctly functioning intake valves to regulate the incoming air and fuel mixture while maintaining combustion chamber compression.

The OE Match intake valve provides an aftermarket replacement for damaged or worn original valves. It is suitable for classic Porsche cylinder head repairs, engine restoration and complete engine rebuilds.