Vaico V10-3859 Engine Oil Separator

Engine Oil Separator for Audi V8 Applications

VAICO V10-3859 is a pressure-controlled engine oil separator for the cylinder head, built for Audi performance and luxury applications that require stable crankcase ventilation control. It uses a diaphragm valve design and a Polyamid 6.6 housing with FPM/ACM seals for a precise OE-style service replacement.

Key Features

• Fitting position: cylinder head
• Pressure-controlled operating mode with diaphragm valve
• Housing material: Polyamid 6.6
• Seal material: FPM (fluoride rubber) / ACM (polyacrylate rubber)
• Supplied with seal ring
• Dimensions: 195 mm length, 122 mm width, 68 mm height
• Recommended replacement interval: 60,000 km or 3 years
• VAICO part number: V10-3859

Detailed Description

This engine oil separator helps regulate oil vapor and crankcase pressure at the cylinder head, supporting cleaner intake tract operation and more consistent engine ventilation. VAICO V10-3859 is a direct-fit replacement for vehicles including Audi S5, Audi A6 Quattro, Audi A8 Quattro, Audi R8, and Audi RS4 with OE reference 079103464F. This part cross-references URO 079103464F for the same application. The VAICO product line focuses on OE-style replacement components for European vehicles, and this separator follows that approach with matched materials, pressure-controlled operation, and a diaphragm valve layout.

What It Helps Address

• Oil vapor buildup in the crankcase ventilation system
• Excessive crankcase pressure from a worn separator
• Oil contamination in the intake tract
• Rough idle or drivability issues related to ventilation faults
• Leaks or seal deterioration at the separator assembly

Installation Notes and Tips

Install at the cylinder head and verify the sealing surfaces are clean before fitting the new seal ring. Replace the separator when symptoms point to crankcase ventilation wear, and follow the recommended 60,000 km or 3-year service interval where applicable. Confirm OE number 079103464F and match the application before installation on Audi S5, Audi A6 Quattro, Audi A8 Quattro, Audi R8, or Audi RS4 models.

Quality Assurance

VAICO V10-3859 is built as an aftermarket replacement with OE-number-based fitment guidance and application-specific materials for European engine service. Its pressure-controlled diaphragm design and sealed construction support consistent replacement quality for Audi V8 applications.