Please wait… 
Please wait while we process your order,
do not press the back button… 
Design911 Design 911 supply Porsche parts, Porsche spares and Porsche accessories, to both retail and to the trade. Our Porsche product and accessory range includes brakes, exhausts, tyres, wheels and Porsche panels and interiors. https://www.design911.co.uk/images/schemaLogo.png https://www.design911.co.uk/images/schemaLogo.png https://www.design911.co.uk Facebook Instagram
Porsche specialists based in the UK
Porsche 996 (911) (1997-2005) 996 C4S 3.6L 09/01-2005 Engine Rebuild Parts

Rocker Arms & Tappets

Rocker Arms & Tappets

Filter by brand
DISPLAYING 1 to 4 (of 4 products)
Camshaft hydraulic valve tappet exhaust set of 12. Porsche 987 Boxster / 996 / 997 / 987C Cayman / 955 Cayenne - 99610504172, 99610504172, 99610504150
5
Camshaft hydraulic valve tappet exhaust set of 12. Porsche 987 Boxster / 996 / 997 / 987C Cayman / 955 Cayenne
99610504172/1KIT
Product Information
Product Information
Camshaft hydraulic valve tappet exhaust SET OF 12

Fits:
Porsche 987 MKI Boxster 2005-08
Porsche 987C MKI Cayman 2006-08
Porsche 996 Carrera 1998-05
Porsche 996 Turbo 2001-05
Porsche 997 MKI Carrera 2005-08
Porsche 955 Cayenne S / Turbo 4.5L 2003-06

Click 'Zoom in' for large parts diagram.
Diagram Ref No 5.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

99610504172
99610504172
99610504172
99610504150

The product you are viewing cross references to these numbers
Camshaft hydraulic valve tappet exhaust. Porsche 987 Boxster / 996 / 997 / 987C Cayman / 955 Cayenne - 99610504172, 99610504150
4
Camshaft hydraulic valve tappet exhaust. Porsche 987 Boxster / 996 / 997 / 987C Cayman / 955 Cayenne
Special Order item
99610504172
Product Information
Product Information
Camshaft hydraulic valve tappet exhaust



Fits:
Porsche 987 MKI Boxster 2005-08
Porsche 987C MKI Cayman 2006-08
Porsche 996 Carrera 1998-05
Porsche 996 Turbo 2001-05
Porsche 997 MKI Carrera 2005-08
Porsche 955 Cayenne S / Turbo 4.5L 2003-06

Click 'Zoom in' for large parts diagram.
Diagram Ref No 5.



Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

99610504172
99610504172
99610504150

The product you are viewing cross references to these numbers
Hydraulic valve tappet, Exhaust. Porsche 986 / 987 Boxster / 996 / 997.1 / 987C Cayman / 955 Cayenne - 99610504172, 99610504172, 99610504150 - 420010410
4
Hydraulic valve tappet, Exhaust. Porsche 986 / 987 Boxster / 996 / 997.1 / 987C Cayman / 955 Cayenne
99610504172/1
Product Information
Product Information

OE Match hydraulic exhaust valve tappet 

Fits:

  • Porsche Boxster 987 2.7L 2005-08/08
  • Porsche Boxster 987 S 3.2/3.4L 2005-08/08
  • Porsche 996 C2 3.4L 1997-08/01
  • Porsche 996 C4 3.4L 1997-08/01
  • Porsche 996 C2 3.6L 09/01-2005
  • Porsche 996 C4 3.6L 09/01-2005
  • Porsche 996 C4S 3.6L 09/01-2005
  • Porsche 996 TURBO 2000-05
  • Porsche 997 MK1 Carrera 2 3.6L 2005-08
  • Porsche 997 MK1 Carrera 2S 3.8L 2005-08
  • Porsche 997 MK1 Carrera 4 3.6L 2005-08
  • Porsche 997 MK1 Carrera 4S 3.8L 2005-08
  • Porsche Cayman 2.7L 987C 2006-08
  • Porsche Cayman S 3.4L 987C 2005-08
  • Porsche 955 Cayenne S 4.5L V8 2003-06
  • Porsche 955 Cayenne Turbo 4.5L 2003-06


Check fitment for your specific vehicle (model, year, engine) before ordering.

What This Product Does

The tappet transfers motion from the camshaft to the valve mechanism. Its hydraulic operation depends on the engine's lubrication system, making oil condition and the associated contact surfaces relevant when investigating wear or noise.

Functions

  • Transfers camshaft movement to the valve mechanism.
  • Supports valve opening in the specified engine application.


Symptoms of Fault

  • Persistent ticking or tapping from the valve mechanism.
  • Valve-mechanism noise becoming more pronounced as engine speed rises.
  • Uneven contact wear found during inspection.
  • Rough running or misfires where valve movement is affected.


Why Replacement Matters

A worn tappet can affect valve movement and contribute to abnormal contact with neighbouring components. Establish the cause before replacement, checking lubrication and camshaft condition rather than assuming every ticking noise originates from a tappet.

FAQs

Can oil condition affect hydraulic tappets?
Contaminated oil can cause hydraulic elements to stick. Include lubrication checks in the diagnosis.

Should the camshaft also be checked?
Inspect the cam lobes and tappet contact surfaces together, as wear may affect both components.

Support & Advice

The requested source could not be retrieved. Matching search descriptions were found, but they did not establish the linked product's exact brand or version; this copy therefore uses the supplied product information.



Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

99610504172
99610504172
99610504172
99610504150

The product you are viewing cross references to these numbers
LIQQUI MOLY Hydraulic Lifter Additive 300ml - 2770
2
LIQQUI MOLY Hydraulic Lifter Additive 300ml
LM2770
Product Information
Product Information

LIQUI MOLY Hydraulic Lifter Additive – 300ml

LIQUI MOLY Hydraulic Lifter Additive is an engine oil treatment designed to reduce noisy hydraulic tappets and improve the operation of oil-fed valve train components.

Its cleaning formula helps remove deposits from oil passages and valve bores, supporting smoother engine operation and improving the function of oil-pressure-operated timing chain tensioners.

What Does It Do?

The additive cleans oil passages and valve bores, helping hydraulic lifters operate correctly. It may also reduce noise from oil-pressure-operated timing chain tensioners.

Why Do Hydraulic Lifters Become Noisy?

Common causes include:

  • Deposits restricting oil passages
  • Contaminated or ageing engine oil
  • Poor lubrication during cold starts
  • Low engine oil pressure
  • Internal lifter wear

When Should It Be Used?

Use when hydraulic tappet noise may be caused by deposits or restricted oil flow.

It can be added during routine servicing. Persistent mechanical noise requires diagnosis, as additives cannot repair worn or damaged components.

Application & Dosage

  • Add directly to the engine oil.
  • One 300ml container treats up to 6 litres of oil.
  • Adjust the dosage proportionally for larger oil capacities.
  • Can be added at any time.
  • Warm the engine after adding.
  • LIQUI MOLY recommends use after each oil change for a lasting effect.

Key Features

  • Helps reduce hydraulic tappet noise
  • Cleans oil passages and valve bores
  • Improves engine oil lubrication properties
  • Supports oil-pressure-operated timing chain tensioners
  • Suitable for compatible petrol and diesel engines
  • Tested for turbochargers and catalytic converters
  • Suitable for engines with diesel particulate filters
  • Compatible with commercially available engine oils
  • 300ml container

LIQUI MOLY Hydraulic Lifter Additives for Porsche Engines

Hydraulic lifters rely on clean engine oil and unrestricted oil passages for reliable operation.

LIQUI MOLY Hydraulic Lifter Additive helps remove deposits that can contribute to noisy tappets and restricted lubrication in compatible Porsche petrol and diesel engines.

Design911 supplies LIQUI MOLY engine additives, lubricants, oil filters and Porsche maintenance products.

DISPLAYING 1 to 4 (of 4 products)
Also found on these pages
About Rocker Arms & Tappets

Rocker Arms (Cam Followers) & Tappets – Precision Valve Train Components for Porsche Engines

The rocker arms (also known as cam followers) and tappets are crucial components within your Porsche’s valvetrain system. They convert the rotational movement of the camshaft into the vertical motion that opens and closes the engine’s valves, allowing precise control of air, fuel, and exhaust flow.

At Design911, we offer a complete range of rocker arms and tappets developed for Porsche engines across all generations. Manufactured from high-strength, wear-resistant alloys, these components ensure smooth operation, minimal friction, and long-lasting durability. Whether you’re restoring a classic air-cooled 911 or upgrading a modern GT engine, our quality valvetrain components deliver the accuracy and reliability your Porsche demands.

What Do Rocker Arms & Tappets Do?

Rocker arms and tappets form the mechanical link between the camshaft and the valves — controlling the timing and lift that determine engine breathing efficiency.

Core Functions:

  • Transmit camshaft movement to open and close the intake and exhaust valves.
  • Maintain precise valve timing for efficient combustion.
  • Reduce friction and wear through precise geometry and lubrication.
  • Ensure smooth, quiet operation across the rev range.
  • Support consistent power delivery and optimal performance.

Well-functioning rocker arms and tappets are essential for maintaining engine efficiency, throttle response, and durability.

Why Do Rocker Arms & Tappets Fail?

Continuous exposure to high temperatures, pressure, and friction makes rocker arms and tappets susceptible to wear over time.

Common Causes of Failure Include:

  • Oil starvation due to blocked passages or poor lubrication.
  • Surface wear or pitting from high mileage or contamination.
  • Excessive valve clearance leading to noise and impact damage.
  • Camshaft wear causing uneven contact and mechanical stress.
  • Material fatigue from prolonged high RPM use.

Symptoms of failure include ticking or knocking noises, loss of power, misfires, or excessive valve noise, all indicating the need for inspection and replacement.

Why Replace Valvetrain Components?

Replacing worn rocker arms or tappets restores accurate valve timing, reduces friction, and prevents camshaft or valve damage. Our high-performance, precision-engineered replacements are designed for exact fitment and long-term durability under extreme conditions.

Key Benefits:

  • Restores proper valve timing and smooth operation.
  • Reduces engine noise and friction losses.
  • Prevents premature wear of the camshaft and valves.
  • Manufactured from heat-treated, wear-resistant materials.
  • Direct-fit compatibility for a wide range of Porsche engines.
  • Ideal for rebuilds, restorations, or performance upgrades.

A reliable valvetrain system ensures your Porsche runs smoother, quieter, and more efficiently — preserving both performance and longevity.

Highlights:

  • High-strength rocker arms, cam followers, and tappets for Porsche engines.
  • Precision-machined for durability and accurate valve control.
  • Reduces noise, friction, and wear under extreme conditions.
  • Perfect for rebuilds, tuning, and classic restoration projects.
  • Direct-fit, manufacturer-quality parts for 911, Cayman, Boxster and other models.
  • Essential for smooth, consistent engine performance.

You may also like
Popular Models