S52 VANOS (Variable Nockenwellensteuerung) Rebuild

 

I've finally got around to installing the Beisan Systems VANOS seal kit that I purchased a few months ago; I also picked up their Rattle Repair Kit just in case.  I used a Red Line Tools RL113240K Single VANOS Timing Kit to lock down the flywheel and valvetrain to service the VANOS assembly.

Red Line Tools RL113240K

Red Line Tools RL113240K

Although it didn't appear that my VANOS assembly needed it, I tried to install the anti-rattle bushing anyway, but even using the cut down socket from Beisan I couldn't get the assembly apart.  I didn't want to bend the aluminum VANOS housing with too much vise action; the fastener was torqued down so hard that the housing would spin out of the soft vise jaws.  I should have used a torque wrench to gauge the amount of force I was putting on things, but it was significant.  Encouraging the VANOS assembly apart with Mr. Heat Gun was also ineffective (he was previously undefeated); rather than break something, I only installed the Beisan o-ring and seal set.

Cams locked down:

Cam Locking Blocks.png

Cam chain pinned:

Cams top:

Cams - Top View.png

Cams Front:

Cams - Front View.png

S52 VANOS Assembly with old o-ring and seal:

VANOS Assembly - O-Ring + Seal.png

The idle seems smoother after the VANOS refresh, and perhaps there is a mild off-idle torque improvement since the rear Michelin PSSs squeal a bit easier on takeoff if I'm not careful.

 
Red Line Single VANOS Timing Kit

Red Line Single VANOS Timing Kit

 
Vise Jaw Pads

Vise Jaw Pads