Trim Genuine Porsche part 94410522903

Cam Idler Roller,  Outer Diameter: 32 mm / Width: 21 mm.
The OE Match Cam Idler Roller is a high-quality replacement timing belt guide roller designed to support and guide the camshaft timing belt within the engine timing system. Featuring an outer diameter of 32mm and a width of 21mm, this precision-engineered idler roller helps maintain correct belt routing, alignment and stability throughout engine operation.

Fits: 

• Porsche 924S 2.5L 1986-87
• Porsche 944 2.5L 8V 1982-87
• Porsche 944 Turbo 2.5L 8V 1985-88  

Diagram Ref No 7

Manufactured to OE specifications for fit, function and durability, the roller is designed to withstand constant rotational loads, engine heat and high-speed operation. It is an essential service component during timing belt replacement and engine maintenance, helping to ensure reliable timing system performance and long-term engine protection.

What This Product Does:

• Guides and supports the camshaft timing belt.
• Maintains correct timing belt alignment and routing.
• Reduces belt vibration and unwanted movement.
• Promotes even belt wear across the timing system.
• Helps ensure accurate synchronisation between the crankshaft and camshaft.
• Supports smooth and reliable engine operation.

Symptoms Of Wear Or Failure:

• Squealing, chirping or grinding noises from the timing belt area.
• Excessive timing belt vibration.Rough or noisy bearing operation.
• Visible wear on the roller surface.Timing belt misalignment.
• Uneven or accelerated timing belt wear.
• Bearing play or looseness within the roller.
• Timing belt failure risk in severe cases.

Why Replacement Matters:

• The cam idler roller operates continuously whenever the engine is running and is subjected to constant rotational speeds, heat and bearing loads. Over time, the internal bearing can wear, lubrication can deteriorate and the roller surface may become damaged.
• A failing idler roller can cause timing belt misalignment, increased belt wear and excessive stress on other timing system components. In severe cases, bearing seizure or roller failure can lead to timing belt damage, potentially resulting in significant engine damage and expensive repairs.

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Related, superseded, cross reference or alternative numbers for comparison.

94410527302

The product you are viewing cross references to these numbers

Cam idler roller, 46mm diameter – 28mm wide.
This is a high-quality cam-/timing-belt idler/guide roller designed to replicates the original manufacturer specifications for diameter, width, bearing quality. Cam idler roller maintaining correct belt tension and alignment so that the camshafts, crankshaft (and in balance-shaft applications) remain perfectly synchronised. If the idler becomes worn or seizes, the belt can deviate, skip teeth or fail, potentially leading to catastrophic engine damage.

Fits:
Porsche 924S 1986 - 1988
Porsche 944 1983 - 1989*
Porsche 944 S, 944 S2, 944 Turbo
Porsche 968 1992 - 1995

* see Notes 2 & 3
Note 1: Also fits early 87 924S up to engine # 43H01919 (Manual Trans) & 43H60384 (Auto Trans)
Note 2: Also fits early 87 924S from engine # 43H01920 (Manual Trans) & 43H60385 (Auto Trans)
Note 3: Early cars (83-86) that have been updated to the later style water pump with belt guard rail will use this roller.

Diagram ref no 6

• Position on Vehicle: his part mounts in the timing belt drive system (camshaft-belt/guide roller area) on the front of the engine block, often adjacent to the belt guard/rail for the water pump/temporal belt path.

• Applications: Timing belt drive systems in the above-listed Porsche models (924S, 944, 968). Suitable replacement when restoring or maintaining correct cam/ crank timing and belt drive reliability.

The timing belt idler roller plays a crucial role in maintaining precise belt alignment and smooth engine operation. Over time, the bearing can wear out or seize, risking belt failure and serious engine damage. Replacing the roller during scheduled maintenance ensures long-term reliability, quiet operation, and protection of vital engine components.

When and why to replace:
• Signs of wear, noise, or rough bearing movement.
• During timing belt or water-pump service for easy access and complete system refresh.
• Preventative maintenance on high-mileage or older vehicles with original rollers.
• To prevent costly repairs caused by belt misalignment or breakage.
• To restore smooth, quiet belt operation and consistent timing performance.

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

94410524104

The product you are viewing cross references to these numbers

Cam Idler Roller.
The OE Match Cam Idler Roller is a high-quality replacement component designed to guide and support the engine's camshaft timing belt. As an integral part of the timing belt system, the idler roller helps maintain correct belt alignment and tension, ensuring precise synchronisation between the crankshaft and camshaft for optimal engine performance.

Fits:

• Porsche 944S 2.5L 16V 1987-88
• Porsche 968 3.0L 1992-94
• Porsche 968 Sport 3.0L 1994-95
• Porsche 968 CS 3.0L 1993-95
• Porsche 968 Turbo S 3.0L 1993-94  

Diagram Ref No 7

Manufactured to OE specifications for fit, function and durability, this cam idler roller is engineered to withstand high rotational speeds, engine heat and continuous operating loads. It is a recommended replacement during timing belt servicing, engine maintenance and timing system overhauls.  

What This Product Does:

• Guides and supports the timing belt during engine operation.
• Maintains correct belt alignment throughout the timing system.
• Helps reduce belt vibration and unwanted movement.
• Promotes even timing belt wear.
• Supports accurate camshaft and crankshaft synchronisation.
• Contributes to reliable engine timing and smooth performance.

Symptoms Of Wear Or Failure:

• Squealing, chirping or grinding noises from the timing belt area.
• Excessive timing belt vibration.
• Rough or noisy bearing operation.
• Timing belt misalignment.
• Uneven or accelerated timing belt wear.
• Visible wear or damage to the roller surface.
• Bearing play or looseness.
• Increased risk of timing belt failure.

Why Replacement Matters:

• The cam idler roller operates continuously whenever the engine is running and is subjected to constant rotational forces, temperature fluctuations and bearing loads. Over time, the internal bearing can wear, lubrication can degrade and the roller surface may become damaged.
• A failing idler roller can compromise timing belt alignment, leading to increased belt wear and unnecessary stress on the timing system. In severe cases, bearing seizure or roller failure may result in timing belt damage or loss of engine timing, potentially causing expensive engine repairs.

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

94410524102

The product you are viewing cross references to these numbers

Guide plate on water pump for timing belt.


Fits:
Porsche 924S 1987-88
Porsche 944 1987-91
Porsche 968 1992-95

Click 'Zoom in' for large parts diagram.
Diagram ref no 5

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

94410521302

The product you are viewing cross references to these numbers