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Belts / Tensioners / Rollers
By OE Match
- Porsche 928S4 5.0L 1987-92
- Porsche 928GT 5.0L 1989-91
- Porsche 928GTS 5.4L 1992-95
The OE Match Camshaft Idler Roller is a high-quality replacement timing belt guide roller designed to support and direct the camshaft timing belt within the engine timing system. As a critical component of the belt drive assembly, the idler roller helps maintain correct belt alignment, reduces vibration and ensures precise synchronisation between the crankshaft and camshaft.
Fits:
- Porsche 928S4 5.0L 1987-92
- Porsche 928GT 5.0L 1989-91
- Porsche 928GTS 5.4L 1992-95
Diagram Ref No 10
Manufactured to OE specifications for fit, performance and durability, this camshaft idler roller is engineered to withstand continuous operation, high rotational speeds and demanding engine conditions. It is an essential service item during timing belt replacement and preventative maintenance, helping to preserve the reliability and accuracy of the engine timing system.
What This Product Does:
- Guides and supports the camshaft timing belt.
- Maintains correct timing belt alignment and routing.
- Helps reduce belt vibration and movement.
- Promotes even belt wear and consistent operation.
- Supports accurate synchronisation between crankshaft and camshaft.
- Contributes to reliable engine timing and performance.
Symptoms Of Wear Or Failure:
- Chirping, squealing or grinding noises from the timing belt area.
- Excessive timing belt vibration.
- Rough or noisy bearing operation.
- Visible wear or damage to the roller surface.
- Timing belt misalignment.
- Uneven or accelerated timing belt wear.
- Bearing looseness or excessive play.
- Increased risk of timing belt failure.
Why Replacement Matters:
- The camshaft idler roller operates continuously while the engine is running and is subjected to constant rotational forces, heat and bearing loads. Over time, bearing wear, loss of lubrication and material fatigue can reduce the roller's effectiveness and reliability.
- A failing idler roller can negatively affect timing belt tracking and alignment, causing premature belt wear and placing additional stress on surrounding timing components. In severe cases, bearing seizure or roller failure may result in timing belt damage or loss of engine timing, potentially leading to costly engine repairs.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
92810557104
The product you are viewing cross references to these numbers
- Porsche 928S2 4.7L 1984-86
- Porsche 928S4 5.0L 1987-92
- Porsche 928GT 5.0L 1989-91
- Porsche 928GTS 5.4L 1992-95
This OE Match camshaft tensioner roller is a replacement timing belt / camshaft drive roller for Porsche 928 models from 1983 to 1995. It is designed to match the original-style fitment and function, helping maintain correct belt guidance and tension within the camshaft timing system.
Fits:
Porsche 928 S2 / S4 / GT / GTS 1983 - 1995
Diagram ref no 9.
The camshaft tensioner roller supports and guides the timing belt as it runs through the engine timing system. It works with the belt tensioning assembly to help keep the belt correctly aligned and tensioned, ensuring accurate camshaft timing and reliable valve train operation.
Functions
• Supports and guides the camshaft timing belt
• Helps maintain correct timing belt alignment
• Works with the tensioning system to support proper belt tension
• Helps ensure accurate camshaft timing
• Reduces the risk of belt tracking issues or timing instability
• Replaces worn, noisy, seized, or damaged original rollers
• OE Match replacement for timing belt service and engine repair.
Why Replace This Part?
Camshaft tensioner rollers are exposed to constant belt load, heat, vibration, and high-speed rotation. Over time, the bearing can wear, become noisy, seize, develop play, or cause uneven belt tracking. A faulty roller can lead to timing belt noise, belt wear, incorrect tension, or serious engine timing problems. Replacing the roller during timing belt service helps protect the timing system and supports long-term engine reliability.
When to Replace This Part
• The timing belt system is being serviced
• The roller is noisy, rough, seized, loose, or worn
• Bearing play is found during inspection
• Timing belt wear or tracking issues are present
• The belt tensioner or related timing components are being replaced
• The engine has timing belt noise from the front cover area
• Preventative replacement is being carried out during major service.
Where it fits on the car
This camshaft tensioner roller fits within the engine timing belt / camshaft drive system on Porsche 928 models. It is installed in the timing belt path and supports correct belt tension and routing according to the factory engine layout.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
92810551212
The product you are viewing cross references to these numbers
- Porsche 928S2 4.7L 1984-86
- Porsche 928S4 5.0L 1987-92
- Porsche 928GT 5.0L 1989-91
- Porsche 928GTS 5.4L 1992-95
This Power Steering Belt is an OE Match V-belt drive belt designed for Porsche 928 models equipped with power steering. It transfers power from the engine to the power steering pump.
Fits:
Porsche 928 1985 - 1995
for cars with power steering
Diagram ref no 20
The belt transmits rotational force from the engine to the power steering pump, enabling hydraulic pressure that assists steering. This reduces steering effort and improves control, especially at low speeds. Without a functioning belt, the power steering system will not operate correctly.
Function
• Drives the power steering pump via crankshaft pulley
• Maintains hydraulic pressure for assisted steering
• Ensures smooth and responsive steering operation
• Provides reliable power transmission under load
Over time, drive belts wear, stretch, or crack due to heat and continuous use. A worn belt can slip, reduce steering assistance, or fail completely -resulting in heavy steering and potential loss of control. Replacing the belt ensures consistent power delivery to the steering system and prevents unexpected failure.
When to replace
• Cracked, frayed, or glazed belt surface
• Squealing noise from engine bay
• Reduced or inconsistent power steering assistance
• Visible belt slack or wear
• During routine service or preventative maintenance
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99919228650
The product you are viewing cross references to these numbers
- Porsche 928S 4.7L 1981-83
- Porsche 928S2 4.7L 1984-86
- Porsche 928S4 5.0L 1987-92
- Porsche 928GT 5.0L 1989-91
- Porsche 928GTS 5.4L 1992-95
Cam Belt Tensioner Boot
High-quality replacement boot for the cam belt tensioner, designed for Porsche 928 models.
This component forms part of the tensioner assembly and
protects the internal mechanism from dirt, moisture, and debris. It is
essential for maintaining correct tensioner operation and ensuring long-term
reliability of the timing belt system.
Fits:
- Porsche 928S 4.7L 1983
- Porsche 928S2 4.7L 1984-86
- Porsche 928S4 5.0L 1987-92
- Porsche 928GT 5.0L 1989-91
- Porsche 928GTS 5.4L 1992-95
Diagram ref no 23
Model years 1983-1986 - Please compare the
rolling diaphragm with your old part, as there are different versions
Technical Specifications
• Height: approx. 18mm
• Outer diameter: approx. 49mm
• Inner diameter: approx. 20mm
As part of routine maintenance, the tensioner should be serviced and the boot replaced every time the timing belt is changed, helping to prevent premature wear and potential engine damage.
This boot provides precise fitment and durability—ideal for both scheduled servicing and full engine maintenance.
Key Features
• Cam belt tensioner protective boot
• Essential for timing belt service
• Protects tensioner internals from contamination
• Maintains correct tensioner function
• OEM-style fit and performance
• Durable construction for long-term reliability
Function and Purpose
This boot is a critical protective component within the timing system.
It helps to:
• Seal and protect the tensioner mechanism
• Prevent ingress of dirt and moisture
• Maintain smooth tensioner operation
• Support correct timing belt tension
Why Replace the Tensioner Boot
The boot is subject to heat and ageing within the engine bay.
Common issues include:
• Cracking or splitting
• Loss of sealing capability
• Contamination of tensioner components
• Reduced tensioner performance
Replacing the boot during timing belt service helps ensure reliable engine operation and longevity.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
92810555208
The product you are viewing cross references to these numbers
- Porsche 928S2 4.7L 1984-86
- Porsche 928S4 5.0L 1987-92
- Porsche 928GT 5.0L 1989-91
- Porsche 928GTS 5.4L 1992-95
Cam belt 219 Round Tooth.
This OE Match timing cam belt is a replacement engine timing belt for Porsche 928 models from 1983 to 1996. It features an RD tooth profile and is designed to match the original-style fitment and function for the correct camshaft timing system application.
Fits:
Porsche 928 S2 / S4 / GT / GTS 1983 - 1996
Diagram Ref No 1.
The timing cam belt connects the crankshaft and camshaft drive system, keeping valve timing correctly synchronised with piston movement. A good timing belt is essential for engine performance, smooth running, and preventing serious timing-related engine damage.
Functions
• Replaces the timing cam belt / camshaft belt
• RD tooth profile
• Synchronises crankshaft and camshaft movement
• Supports correct valve timing
• Helps maintain smooth engine running and performance
• Replaces cracked, worn, contaminated, stretched, or aged timing belts
• OE Match replacement for Porsche 928 timing belt service.
Why Replace This Part?
Timing belts wear with age, mileage, heat, oil contamination, tension changes, and repeated engine use. A worn or overdue cam belt can crack, lose teeth, stretch, fray, or fail without warning. Timing belt failure can cause poor running, loss of valve timing, non-start issues, or severe engine damage. Replacing the belt at the correct service interval helps protect the engine and maintain reliable operation.
When to Replace This Part
• The timing belt service interval is due
• The cam belt is cracked, frayed, glazed, contaminated, or worn
• Belt teeth are damaged or missing
• The belt has been exposed to oil, coolant, or dirt contamination
• Timing belt tension is incorrect or unstable
• The water pump, tensioners, rollers, or front engine seals are being replaced
• Preventative replacement is being carried out during major engine service.
Where it fits on the car
This belt fits within the engine timing belt / camshaft drive system on Porsche 928 models. It runs between the relevant crankshaft and camshaft pulleys according to the factory timing layout.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
92810515750
The product you are viewing cross references to these numbers
OEMatch Belts / Tensioners / Rollers — Fit, Function, Confidence
These belts, tensioners and rollers control engine timing and auxiliary drives on Porsche models and are commonly replaced during major services and engine rebuilds to restore precise operation and reduce the risk of future failures. Many owners search for genuine or OEM belts; OEMatch offers compatible alternatives engineered to match original-spec dimensions and tolerances for common Porsche applications.
- Timing belts and cambelts
- Auxiliary and serpentine belts
- Tensioner assemblies and hydraulic tensioners
- Idler and guide rollers
- Complete timing kits
Understanding OEMatch Belts / Tensioners / Rollers
OEM (Original Equipment Manufacturer) parts are made by the same company that produced your Porsche’s original belts, tensioners and rollers.
OE (Original Equipment) refers to parts matching original specifications for the belts, tensioners and rollers and may be supplied by alternative manufacturers. Aftermarket parts offer alternative options, sometimes with enhanced features or better value. OEMatch supplies non-OEM belts, tensioners and rollers engineered as direct-fit alternatives to OEM parts, made to original-spec dimensions and tolerances for Porsche models. OEMatch maintains a wide Porsche-focused catalogue and supports vehicle maintenance with thousands of cross-references and a continuing programme of new part development to help keep Porsche vehicles on the road.
Benefits Include
- Restored timing precision after rebuilds or major services
- Reduced risk of belt slip, noise and bearing failures
- Improved reliability for high-temperature and high-mileage applications
Why Belts / Tensioners / Rollers Wear and Fail
- Ageing rubber and heat exposure causing cracks or loss of flexibility
- Worn bearings in rollers or tensioners generating noise and vibration
- Loss of correct tension leading to slippage or timing misalignment
- Contamination from oil or coolant degrading belt materials
The Importance of Replacing with OEMatch Belts / Tensioners / Rollers
Replacing belts, tensioners and rollers during an engine rebuild or scheduled maintenance restores correct timing relationships, reduces the chance of catastrophic engine damage and supports long-term engine reliability on Porsche models. Using refreshed tensioners and rollers alongside new belts helps ensure even loading, quieter running and consistent operation across the rev range, protecting valves, pistons and ancillary drives.
Advantages
- Parts selected for Porsche applications and original-spec dimensions
- Complete kits available to simplify rebuilds and avoid mixing old and new components
- Options covering timing and auxiliary systems to match common service requirements
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Oil System Parts
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Gaskets & Sets
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Radial Seal / RMS / Camshaft / Balance shaft
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