Belts / Tensioners / Rollers

Air Conditioning belt for factory York compressor AVP13x1155La.



Fits:
Porsche 911 Carrera 1984-1989

Click 'Zoom in' for large parts diagram.
Diagram ref no 23

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Related, superseded, cross reference or alternative numbers for comparison.

99919225450

The product you are viewing cross references to these numbers

Air Conditioning Belt For Factory York Compressor AVP13x1155La.
Maintain reliable operation of your Porsche's air conditioning system with this OE Match Air Conditioning Belt for Factory York Compressor (AVP13x1155La). Produced to OE-style specifications, this drive belt is engineered specifically for Porsche models equipped with the factory-fitted York air conditioning compressor, providing the correct length and profile for dependable power transmission. Manufactured from high-quality, reinforced rubber compounds with high-strength tensile cords, it offers excellent resistance to heat, wear, and stretching, ensuring reliable performance for maintenance, repairs, and restoration projects.

Fits:

• Porsche 911 1984-1986 3.2L
• Porsche 911 1987-1989 3.2L G50  

Diagram Ref No 23

The air conditioning belt transfers engine power to the factory York compressor, enabling efficient operation of the air conditioning system. Over time, continual heat cycles, age, and normal use can cause the belt to harden, crack, glaze, or stretch, reducing drive efficiency and increasing the risk of belt slip or failure. Replacing a worn belt restores dependable compressor operation and helps maintain effective air conditioning performance, making this OE Match component an ideal choice for Porsche maintenance, repairs, and restoration projects.  

What This Product Does:

• Transfers engine power to the factory York air conditioning compressor.
• Ensures reliable compressor operation.
• Maintains correct belt tension and drive efficiency.
• Helps provide consistent air conditioning performance.
• Reduces the risk of belt slip and drive loss.
• Replaces worn, stretched, cracked, or glazed drive belts.
• Provides an OE-style fit for straightforward installation.

Symptoms Of Wear Or Failure:

• Cracked, frayed, or glazed belt surfaces.
• Belt squeal during start-up or compressor engagement.
• Air conditioning operating intermittently or inefficiently.
• Belt slipping or poor belt tension.Visible stretching or deterioration.
• Rubber debris around the pulleys.Complete belt failure preventing compressor operation.

Why Replacement Matters:

• The air conditioning belt is essential for transmitting engine power to the factory York compressor, allowing the air conditioning system to function efficiently. As the belt ages, it can lose tension, crack, or deteriorate, reducing compressor performance and increasing the risk of unexpected failure. A failed belt will prevent the compressor from operating and may also leave damaged belt material within the engine compartment.
• Replacing a worn drive belt restores reliable compressor operation, maintains correct belt tension, and helps ensure consistent air conditioning performance while reducing the likelihood of roadside belt failure. Manufactured as a direct replacement and produced to OE-style specifications, this OE Match Air Conditioning Belt for Factory York Compressor delivers reliable fit, performance, and durability for Porsche maintenance, repairs, and restoration projects.

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

99919225450

The product you are viewing cross references to these numbers

Air Pump Belt - 9.5 x 975.



Fits:
Porsche 911 3.2L 1978-89

Click 'Zoom in' for large parts diagram.
Diagram Ref No 35.

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

90019200550

The product you are viewing cross references to these numbers

OE Match air pump belt for Porsche 911 applications from 1978–1989. This narrow V-belt has the supplied dimensions of 9.5 x 975 and is intended for the air injection pump drive.

Fits:
Porsche 911 3.2L 1978 - 1989

Diagram ref no 35

Diagram: 108-00, item 34 — 911 SC 1978–83
Diagram: 108-00, item 35 — 911 Carrera 930.26 1987-89
Diagram: 108-00, item 35 — 930.26 (AUS) (CH) (S) 1984–86

What This Product Does

The belt provides the mechanical drive to the air injection pump. It is an auxiliary drive component, rather than a belt used to control valve timing. Correct specification and adjustment are important when renewing it.

Functions

• Transfers drive through the air pump pulley system.
• Provides a replacement for an aged, damaged or slipping air pump belt.

Technical Details

• Belt construction: narrow V-belt.
• Supplied dimensions: 9.5 x 975.

Symptoms of Fault

• Squealing during starting or changes in engine speed.
• Cracks, splitting, frayed edges or a shiny belt surface.
• Belt dust near the pulleys or visible signs of slipping.
• Fluid contamination affecting the belt surface.

Why Replacement Matters

Age, heat and contamination can deteriorate a drive belt even when the car covers few miles. Renewing a worn belt addresses deterioration in the pump drive, but associated pulley condition, alignment and adjustment should also be checked. A replacement belt alone will not correct a damaged pulley or a binding pump.

FAQs

What should be checked before fitting?
Match the vehicle details and belt dimensions, then inspect the pulleys for damage, contamination and alignment.

Why might a replacement belt still squeal?
Incorrect adjustment, pulley misalignment or contamination may remain. Identify the cause rather than simply increasing belt tension.

Can excessive tension cause problems?
Yes. Use the adjustment procedure specified for the vehicle; overtightening can place unnecessary load on the driven components.

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

90019200550

The product you are viewing cross references to these numbers

Alternator Belt, Narrow V-belt.
Belt size: 10 x 710



Fits:
Porsche 911 1965-73
Porsche 911 Turbo 1976 >>
Porsche 911 SC 1974-79 (Check Size of your Belt)
Porsche 911 SC 1980-83
Porsche 911 3.2L 1984-89
Porsche 914 1970-76

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

9991921765A

The product you are viewing cross references to these numbers

Alternator belt, Narrow V-belt.
Belt size: 10 x 713 mm
The V-belt runs between the crankshaft pulley and the alternator/fan pulley. It’s the primary mechanical link that spins the alternator to charge the battery and, on air-cooled 911s and 914-6 models, turns the engine cooling fan.

Fits:
Porsche 911 1965 - 1973
Porsche 911 Turbo 1976 >>
Porsche 911 SC 1974 - 1979 (Check Size of your Belt)
Porsche 911 SC 1980 - 1983
Porsche 911 3.2L 1984 - 1989
Porsche 914 1970 - 1976

Please note: Always confirm against the belt size currently fitted and pulley setup before ordering.

Why Replacement Matters - With age and mileage, belts:
• Crack, glaze, or harden, reducing grip
• Stretch, making correct tension impossible
• Begin to slip, causing charging issues and, on air-cooled engines, reduced cooling fan speed

A slipping or failing belt can lead to battery discharge, warning lights, overheating, or being stranded. Fitting a fresh belt restores reliable alternator and fan drive, protecting both the engine and electrical system.

When to Replace - Consider replacing the alternator belt if:
•  You see cracks, fraying, glazing, or missing chunks in the belt rubber
•  The belt squeals on startup or under load
•  The belt has stretched and can’t be tensioned correctly
•  You’re doing routine service on a classic 911 / 914-6 or preparing for a long trip
•  The car is undergoing engine-out work or restoration

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

9991921765A

The product you are viewing cross references to these numbers

Alternator Belt. Narrow V-Belt 9.5 x 695.



Belt size: 9.5 x 695

Fits:
Porsche 911 SC 1980-83
Porsche 911 1984-89

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

9991923135A

The product you are viewing cross references to these numbers

Hexagon head bolt M10 x 45 - Various applications

Sold each

Fits:
Porsche 356B / 356C - 1960 to 1965
Porsche 911 - 1978 to 1989
Porsche 924S - 1986 to 1988
Porsche 944 - 1985 to 1991
Porsche 968 - 1992 to 1995
Porsche 928 - 1978 to 1995 

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

90007437201

The product you are viewing cross references to these numbers

Shim washer for alternator belt pulley 0.5mm for Porsche 911 models, used to fine-tune alternator belt alignment and tension across classic 911 applications from 1965–1989.

What This Product Does
This 0.5mm shim washer sits between the alternator belt pulley halves to adjust pulley spacing, helping to achieve correct belt tension and alignment. Using the appropriate number of shims supports smooth belt operation and reduces the risk of premature belt wear.

Functions

• Spaces the alternator pulley halves to achieve correct belt tension
• Helps align the alternator belt with adjacent pulleys
• Allows fine tolerance adjustment in 0.5mm steps
• Contributes to stable alternator and cooling fan drive

Symptoms of Fault

• Squealing or chirping from the alternator belt area on start-up or under load
• Visible belt slack or difficulty setting correct belt tension
• Uneven belt wear or fraying at the pulley edges
• Traces of belt dust around the alternator and pulley
• Intermittent charging issues linked to belt slip
• Overheating risk on engines where the belt also drives the cooling fan

Why Replacement Matters
Alternator and fan belt systems on classic Porsche 911 models rely on a stack of correctly sized shims to set belt tension within specified tolerances. Missing, damaged, or incorrect shims can make precise adjustment difficult, leading to belt slip, noise, and accelerated wear. Replacing worn or lost shim washers when servicing the belt or pulleys helps restore proper alignment and tension control, supporting reliable charging and cooling operation on older 911 engines.

Fits

• Porsche 911 & 912 (1965–1989)
• Porsche 911 1974–1977 2.7L / 1976–1977 3.0 Carrera
• Porsche 911 1975–1977 3.0L Turbo (930)
• Porsche 911 1978–1983 3.0L SC
• Porsche 911 1984–1986 3.2L
• Porsche 911 1987–1989 3.2L G50

FAQs

• Q: How many shims should be used?
  A: Follow the Porsche workshop manual for your specific model. The total number of shims is usually fixed, with the split between in-use and parked shims determining belt tension.
• Q: Where are the spare shims stored?
  A: Typically, unused shims are kept under the pulley nut or outer pulley half so they remain available for future adjustment.
• Q: When should shims be renewed?
  A: Replace shims that are bent, corroded, damaged, or missing when changing the alternator belt or pulley components, to ensure accurate tolerance adjustment.

Support & Advice
Ensure you use the correct combination of shims to bring the belt tension within the recommended tolerances for your engine. Always confirm fitment against your vehicle details (model, year, engine) before installation.

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

9301065640Y

The product you are viewing cross references to these numbers

V-Rib Belt Crank Pulley and Tensioner Upgrade  Kit by Adapt Motorsport replaces the original V-belt arrangement while retaining the standard fan drive ratio.

Fits:

• Porsche 911 1984-1986 3.2L
• Porsche 911 1987-1989 3.2L G50

What This Product Does

This conversion uses a multi-rib belt to transfer drive to the cooling fan and alternator. The eccentric-mounted idler pulley provides controlled tension adjustment and reduces belt whip, addressing limitations that can affect the original V-belt arrangement during fast engine-speed changes, hard driving or operation with a high-current alternator.

Functions

• Transfers crankshaft rotation to the fan and alternator through a V-rib belt
• Provides precise belt-tension adjustment through the eccentric idler pulley
• Reduces belt whip during rapid changes in engine speed
• Retains the original fan drive ratio
• Provides pulley markings for base and cam timing work

Technical Details

• Precision-machined from high-grade aluminium
• Black anodised finish
• Component strength validated using finite element analysis
• Timing notches at 0, 5, 120 and 240 degrees
• Standard kit includes the V-rib crank pulley, eccentric idler pulley kit, fan pulley and fan belt
• Standard+Trigger kit adds a lightweight 36-1 crank trigger disc for a crankshaft position sensor used in EFI conversions

Symptoms Addressed

• Original V-belt being displaced during rapid engine-speed changes
• Belt slip when driving a high-current alternator
• Accelerated belt wear caused by slipping
• Excessive belt tension being used in an attempt to prevent slip
• Loss of charging voltage or cooling-fan drive following belt displacement or failure

Why Replacement Matters

A displaced or slipping fan belt can interrupt alternator and cooling-fan operation. The V-rib design increases the available belt contact area, while the adjustable idler allows tension to be set without relying on excessive belt loading that may shorten alternator-bearing life.

Kit Options

• Standard Kit: V-rib crank pulley without trigger disc, eccentric idler pulley assembly, fan pulley and fan belt.
• Standard+Trigger Kit: All Standard Kit components plus a lightweight 36-1 trigger disc for EFI crankshaft-position sensing.

FAQs

• Does this kit change the fan speed? No. The original fan drive ratio is retained.
• Is it suitable for 2.7 or 3.0 engines? No. Adapt Motorsport states that the pulleys interfere with the 2.7 and 3.0 engine consoles.
• What is the trigger option for? It adds a 36-1 crank trigger disc for a crankshaft position sensor when carrying out an EFI conversion.
• Are timing marks included? Yes. The pulleys are marked at 0, 5, 120 and 240 degrees for base and cam timing settings.

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

AMS905024

The product you are viewing cross references to these numbers