These vans are becoming modern classics. If you plan on keeping your Vito or Viano for the long haul, maintaining it "by the book" ensures that you don't cause long-term damage by "making do" with incorrect procedures.
This section details major mechanical overhauls. It includes cylinder head removal procedures, timing chain replacement steps, valve adjustments, and oil pump rebuild specifications. Group 21-35: Transmission and Drivetrain w639 workshop manual
Every successful repair hinges on accurate torque values and fluid capacities. Below are standard baseline figures found within the W639 technical data sheets. Always cross-reference your specific engine code in your manual, as values change across production years. Essential Torque Values 180 Nm (133 lb-ft) Engine Oil Drain Plug (OM646/OM651): 30 Nm (22 lb-ft) Front Brake Caliper Guide Bolts: 30 Nm (22 lb-ft) These vans are becoming modern classics
Access the main fuse box in the engine bay and check Fuse 15 (40A) which powers the compressor. It includes cylinder head removal procedures, timing chain
Fixing steering rack leaks and replacing track rod ends. 4. Electrical System and Electronics
While these don't cover mechanical repairs, they are vital for locating fuse boxes and understanding basic dashboard indicators. Key Content Typically Included A standard W639 workshop manual covers: General Information: Vehicle identification and maintenance schedules. Engine Mechanical:
Whether you are an owner-operator maintaining a fleet or a DIY enthusiast restoring a high-mileage camper, having access to a is not just an option—it’s a necessity. This article explores the importance of this manual, what it covers, and why it is the key to minimizing service costs. 1. What is the W639 Workshop Manual?