Date:         Sun, 20 May 2012 13:50:55 -0400
Reply-To:     "Chris S." <szpejankowski@GMAIL.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         "Chris S." <szpejankowski@GMAIL.COM>
Subject:      Re: valve adj.: lower compression, valvetrain noise remains
Comments: To: Dan Barrett <dbx@POBOX.COM>
In-Reply-To:  <4FB868B0.5030508@pobox.com>
Content-Type: text/plain; charset=utf-8

WBX engines are normally pretty quiet and smooth. 

The question to ask is whether there are any oil pressure issues or camshaft wear that is making the noise worse.  In other words, are lifters the problem or a symptom. 

Chris.

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Dnia May 19, 2012 o godz. 23:44 Dan Barrett <dbx@POBOX.COM> napisał(a):


> Dennis:
> 
> I adjusted them because over the years the valve clatter got louder,
> and it sounded like the lifters weren't ever pumped up, even after
> highway driving.  When I opened the valve covers, some of the
> adjustment screws were pretty far from the end of the valve stem -- I
> could move the rocker arm back and forth a millimeter or so at TDC.
> 
> Best,
> d.
> 
> 
> 
> Date:    Sat, 19 May 2012 17:36:27 -0400
> From:    Dennis Haynes <d23haynes57@HOTMAIL.COM>
> Subject: Re: valve adj.: lower compression, valvetrain noise remains
> 
> Why did you see the need to adjust them in the first place? Once properly
> set up they are self adjusting with a significant amount of tolerance. If
> they should need an adjustment something is wrong.
> 
> One thing to be aware of is that there will be a wear pattern-groove
> on the
> valve adjusting screws. Adjusting the screws and miss matching the groove
> can cause the valve stem and screw to wear rapidly.
> 
> As has been posted it is common for the lifters to get air bound and
> make a
> lot of racket. The fix for this is really to let the engine run until the
> oil is warm and then either drive it or rev the engine at 3,000 to
> 4,000 rpm
> to get the lifters pass oil and pump up. While adjusting you will be
> able to
> feel the ones that are soft. You need to be careful during adjusting that
> you don't miss take the slack being taken out of the pushrod for bottoming

> out the lifter.
> 
> Dennis