Many BMW owners are faced with VANOS issues in their high mileage engines. These problems can make your smooth running BMW sound like a noisy diesel and rob you of crucial, low to mid range torque that is necessary for reliability.
What makes VAC's repaired VANOS units unique?
In our state of the art machine shop facility, each VANOS unit is cleaned, fully inspected, and refreshed using the best long-term components available on CNC equipment. This process includes:
Complete bearing replacement to eliminate VANOS rattle
Upgrading original O-Ring seals to high performance Viton
Replacing OEM seals to Teflon
Optimizing internal oil flow and pressure for quiet operation and durability
Modifying thrust washers on the cam assembly
Utilizing late-style dual spring/hydraulic tensioner for improved functionality
Installing fresh VANOS mounting gasket
What Options should I select?
OEM Style: for customers with aging or malfunctioning VANOS units. These are to be used along with factory BMW's OE cams, VAC Sport cams, or Schrick's 264/256 Sport cam set.
Big Camshaft Modification: These units are intended for use with any big cam modifications, including VAC Track & Race Cam sets. For these high lift cams, this limits the travel of the VANOS mechanism, allowing OEM pistons to be used..
VAC Tech Note: Our VANOS elimination kit is for a full race vehicle that does not see low RPM use. If you drive your BMW on the street, we highly recommend keeping your VANOS system as it provides a significant improvement in low RPM torque.
For ALL Performance Camshafts, it is highly recommended that you select the Big Camshaft option when ordering.