It won't hurt to put one new lifter in to see if it fixes the problem.
If it is a fix then you did the right thing.
Depending on the engine miles and cam condition you then have to decide
if you're going to install a whole set of new lifters.
I'm not familiar with Waser boxers but I'd done single lifter
replacements in Air Cooled and got the fix.

Stan Wilder

On Mon, 7 Oct 2002 08:56:33 -0700 Todd Last <Rubatoguy@MINDSPRING.COM>
writes:
> Can the hydraulic lifters in the 2.1L motor be removed and replaced
> without having to replace any other valvetrain components?
> I seem to have a noisy lifter, and even after a number of tries
> with
> mystery oil and the like, it is still noisy. Its usually worst when
> cold
> and first started - it does improve somewhat after driving a few
> hundred
> miles, but I can still hear the noise.
>
> I was wondering if I could remove them with the motor in place,
> clean or
> replace them, and be on my way.
>
>
> Todd
> '88 Vanagon
>
>

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