Unless you think the valves were tampered with or if they are noisy leave them be. From new if any adjustment is needed then a repair is really needed. If you really feel the need plan to replace the adjusting screws. You will find some of them have a wear pattern. When turned this pattern will no longer match the valve stem and things can then get torn up quickly. 

Dennis

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of Neil N
Sent: Monday, February 2, 2015 5:04 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Re: Removing stuck O2 sensor

I attended a VW campout recently and was quite heartened to hear a
*very* nice sounding WBX 2.1 engine. Smooth and "right" sounding. No idea how many miles on it etc. but the bus appeared to be quite well maintained. However....

A bus can look nice but who knows what work has been done?

As a really rough estimate, anywhere from 1/3 to 1/2 the stock (or near to) engined buses I hear driving by at these campouts have lumpy idles, and-or smell rich, etc. No judgements from me. Just a small niche POV.

I've been meaning to check the valve adjustment on my 2.1  It idles much better than it did when I got it but it's still not quite right and can surge just off idle.

Neil.

On 2/2/15, Stuart MacMillan <stuartmacm@gmail.com> wrote:

> ..... Idle on all the
> WBXs I’ve seen has never been truly smooth.

--
Neil n

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