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[ Follow Ups ] [ 5-series (E34) Message Board ] [ Msg. Board FAQ ]

Posted by moots on February 22, 2000 at 16:49:49:

In Reply to: NON VANOS ROUGH IDLE SOLUTION posted by graham on February 22, 2000 at 16:08:34:

What does advancing and retarding the cam mean?
Is it increasing/decreasing the valve clearance?
Does it apply to ALL engine models or only engines with hydraulic lifters?As far as I can tell,the cam lobes on the camshaft are one piece and can never be adjusted to advance/retard the timing and I have yet to see a camshaft assy with adjustable camlobes.Plse enlighten me.

moots '90 520i

: Terry Sayther, Chief Technical Guru for BMW CCA(Roundel) recommends: Remove valve cover, attach the cam timing blocks, advance exhaust cam and retard the intake cam each about 1/16". You'll need the factory tool to do this, but it helps the idle tremendously, and adds a little bit of power. GOOD LUCK!

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