1. Introduction
The Laser 8421 Camshaft Sprocket Holding Tool is a specialized adapter designed for use with the Laser Part No. 7279 pulley holding kit or an equivalent OEM lever. This tool facilitates the secure holding of camshaft drive pulleys on specific Volkswagen Group 1.0L and 1.5L petrol engines, particularly those manufactured from 2017 onwards. Its primary function is to assist in engine timing procedures, such as timing belt replacement, by preventing camshaft rotation.
2. Safety Information
- Always wear appropriate personal protective equipment (PPE), including safety glasses and gloves, when working on vehicle engines.
- Ensure the vehicle is safely supported on jack stands and the engine is cool before beginning any work.
- Refer to the vehicle manufacturer's service manual for specific procedures and torque specifications.
- This tool is intended for professional use or by individuals with appropriate mechanical knowledge. Improper use can lead to engine damage or personal injury.
- Keep the tool clean and free from oil or grease to maintain a secure grip.
3. Package Contents
Verify that all components are present and undamaged upon opening the package:
- 1 x Laser 8421 Camshaft Sprocket Holding Tool (Conversion Disc)
- 2 x Securing Screws
Image 3.1: The Laser 8421 Camshaft Sprocket Holding Tool, a circular disc with four holes, shown with two black securing screws.
4. Specifications
| Feature | Detail |
|---|---|
| Model Number | 8421 |
| Manufacturer Part Number | 8421 |
| Equivalent OEM Tool | T10575A |
| Item Weight | 1.14 pounds (approx. 0.52 kg) |
| Package Dimensions | 9.8 x 6.5 x 0.79 inches (approx. 24.9 x 16.5 x 2.0 cm) |
5. Applications
This tool is specifically designed for 3-cylinder 1.0L and 1.5L EA 211 EVO petrol engines found in various Volkswagen Group vehicles from approximately 2017 onwards. Compatible engine codes include: DACA, DACB, DADA, DFYA, DHFA, DPBA, DPCA, and DPBE.
Compatible Vehicle Models:
- Audi: A1 (from 2018), A3 (from 2017), Q2 (from 2018), Q3 (from 2018)
- Seat: Arona (from 2017), Ateca (2018 to 2020), Ibiza (2017 to 2020), Leon (from 2018), Tarraco (from 2019)
- Skoda: Kamiq (from 2019), Karoq (from 2017), Kodiaq (from 2017), Octavia (from 2017), Scala (from 2019), Superb (from 2017)
- Volkswagen: Arteon (2017 to 2020), Golf (from 2017), Passat (from 2018), Polo (from 2017), T-Cross (from 2019), Tiguan (from 2019), Touran (from 2018), T-Roc (from 2017)
6. Setup and Operation
This tool acts as an adapter for a larger pulley holding tool (e.g., Laser Part No. 7279 or OEM T10575A). Follow these steps for proper use:
- Prepare the Engine: Ensure the engine is cool and all necessary components (e.g., engine cover, timing belt cover) have been removed to access the camshaft sprocket. Consult your vehicle's service manual for specific disassembly instructions.
- Identify the Sprocket: Locate the camshaft sprocket that requires holding.
- Position the Laser 8421 Tool: Carefully place the Laser 8421 conversion disc onto the camshaft sprocket. Align the four holes on the disc with the corresponding threaded holes on the sprocket. Ensure the tool sits flush against the sprocket surface.
Image 6.1: View of a camshaft sprocket on an engine, showing the central bolt and surrounding holes for tool attachment.
- Secure the Tool: Insert the two provided securing screws through two of the aligned holes on the Laser 8421 disc and into the camshaft sprocket. Tighten these screws hand-tight initially, then to the manufacturer's specified torque if applicable, ensuring the disc is firmly attached to the sprocket.
- Attach Main Holding Tool: Once the Laser 8421 disc is secured, attach the main pulley holding tool (Laser Part No. 7279 or OEM lever) to the Laser 8421 disc. The larger holding tool will engage with the outer perimeter or specific points on the Laser 8421 disc, allowing you to counter-hold the camshaft sprocket.
Image 6.2: Close-up view of the Laser 8421 tool secured to the camshaft sprocket, with a larger pulley holding tool attached to it.
Image 6.3: A wider perspective showing the Laser 8421 tool and the attached pulley holding tool in position on the engine's camshaft sprocket.
Image 6.4: Side view illustrating the Laser 8421 tool and the main holding tool securing the camshaft sprocket, with the timing belt visible.
- Perform Service: With the camshaft sprocket securely held, proceed with the required service operation (e.g., loosening or tightening the central bolt, replacing the timing belt).
- Remove Tools: After completing the service, carefully remove the main holding tool, then unfasten the two securing screws and remove the Laser 8421 disc from the camshaft sprocket.
7. Maintenance
- After each use, clean the tool thoroughly to remove any oil, grease, or debris. Use a clean cloth and a mild degreaser if necessary.
- Inspect the tool for any signs of wear, damage, or deformation. Do not use a damaged tool.
- Store the tool in a dry, clean environment to prevent corrosion.
8. Troubleshooting
This is a mechanical holding tool with no moving parts or electronic components. Troubleshooting is generally limited to proper application:
- Tool does not fit: Verify that the vehicle and engine code are listed in the 'Applications' section. Ensure the correct camshaft sprocket is being targeted.
- Screws do not tighten: Check for cross-threading or debris in the sprocket's threaded holes. Ensure the correct screws are being used. Do not force screws.
- Sprocket still rotates: Ensure the Laser 8421 tool is securely fastened to the sprocket and the main pulley holding tool is correctly engaged with the Laser 8421 tool.
9. Warranty and Support
Laser Tools products are manufactured to high standards. For warranty information, technical support, or inquiries regarding this product, please contact Laser Tools directly or visit their official website.
Official Website: www.lasertools.co.uk
Image 9.1: 'Made in Sheffield' logo, indicating the product's origin.
