Laser Valve Stem Seal Service Kit - 4399
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eBay£85.17Visit shop EOL STOCK CLEARANCE! Laser 4399 Valve Stem Seal Service Kit Fits Audi 20V
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eBayEOL STOCK CLEARANCE! Laser 4399 Valve Stem Seal Service Kit Fits Audi 20V
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Product Information
Full details
The Laser Valve Stem Seal Service Kit (4399) is designed for professional mechanics and experienced DIY enthusiasts working on Audi 20V engines, specifically those with engine codes ADR and APT. Its primary benefit is the ability to replace valve stem seals without the labor-intensive process of removing the cylinder head, significantly reducing maintenance time. However, users should note that this kit is highly specialized and is strictly compatible with the identified engine codes, requiring a certain level of technical proficiency to operate safely.
All features
| Model Part Number | 4399 |
|---|---|
| Brand | Laser |
Extended Product Information
FAQs
Can this kit be used on other Audi engines?
No, this kit is specifically engineered for Audi 20V engines with engine codes ADR/APT only.
Do I need to remove the cylinder head?
No, one of the primary features of this kit is that it allows for seal replacement while the cylinder head remains on the engine.
What tools are included in the kit?
The kit includes a compressor unit assembly, the OEM 3364 valve spring holding tool, the OEM 653/3 pressure hose, and the OEM 3365 valve stem seal replacer.
Do I need an air compressor?
Yes, an external compressed air source is required to use the pressure hose effectively to keep the valves closed.
Is this kit suitable for a beginner?
This kit is intended for users with professional mechanical experience, as working with valve train components requires technical precision to avoid engine damage.
Troubleshooting
Valve slips when pressure is applied
Ensure the pressure hose is correctly seated and the cylinder is at Top Dead Center (TDC) to hold the valve against the seat.
Difficulty compressing the valve spring
Check that the OEM 3364 holding tool is aligned perfectly with the valve spring retainer before applying downward force.
Pros and Cons
Pros
- Eliminates the need for cylinder head removal
- Specific tools for Audi ADR/APT engines
- High-quality build for workshop durability
- Reduces total repair time significantly
Cons
- Not compatible with engines outside of the ADR/APT specifications
- Requires professional-level mechanical knowledge
- Requires access to a compressed air supply
Setup, Compatibility & Care
Compatibility: This kit is designed exclusively for Audi engines with ADR/APT codes. Always verify your engine code before attempting to use this tool.
Setup: Before starting, ensure you have a regulated compressed air supply ready. Position the vehicle in a stable environment and remove the spark plugs. Follow the specific workshop manual for your engine to ensure the piston is at the correct position (TDC) for each cylinder being serviced to prevent valve drop.
Care: After each use, wipe down all metal components with a light machine oil to prevent surface corrosion. Store the tools in the original case to keep the OEM-specific attachments organized and protected from impact damage.