Valve lifters - again

[Radek]

OK, so it looks like softness, especially after the engine hasn't been run 
for a while, is OK?
I wonder about putting in used ones from another engine.  Bentley 
specifically advises, when removing lifters, to put them back in the same 
place. That, I suppose, because they "settle" in their place.  If I were to 
replace the soft ones on the 90Q with used but hard ones from the EV, 
wouldn't that cause problems because the old ones were "settled" for a 
different engine?  Just curious.
Thanks for your advice guys.

Radek.

> ------------------------------
>
> Message: 3
> Date: Sat, 6 Oct 2012 12:21:18 -0400
> From: Grant Lenahan <glenahan at vfemail.net>
> To: "Radek" <radek at uniserve.com>
> Cc: quattro at audifans.com
> Subject: Re: Valve lifters - again
> Message-ID: <6218457E-E143-4531-A84B-D070141A7CCD at vfemail.net>
> Content-Type: text/plain; charset=us-ascii
>
> In most of my audis, especially older ones, they ALL go soft when they 
> stand even for a couple days, and clatter until they pump up.  Deposits 
> (varnish) can also cause them to be sticky.  So i'd suggest caution before 
> throwing money and time at it; clean them too.
>
> Grant
> On Oct 6, 2012, at 12:06 PM, Radek wrote:
>
>> Two questions about valve lifters:
>> 1. is it OK to put used ones in (from another car), provided they are 
>> still good?
>> 2. How to tell they are good?
>> Background:  my son's 1988 90Q has been out of commission for a couple of 
>> months now, due to rear differential problems (nearly solved now, 
>> separate topic).   I remember checking valve lifters about a year ago, 
>> two of them were soft (don't remember which ones).  So I decided to open 
>> up the front, change the timing belt and the two lifters while the car is 
>> on stands in the garage.
>> First, I did a leakdown test to see if the valves are good - no issues. 
>> Second, I checked all lifters for softness (rolling the camshaft to get 
>> the lobes up and pushing down on the lifters with a small piece of wood). 
>> To my surprise, 7 out of 10 were soft.  Tolerance according to Bentley is 
>> just 0.01 mm.
>> Is it possible that because the engine hasn't been started for over two 
>> months, oil leaked out of the lifters and they are soft, but when the 
>> engine starts again they will be OK?
>> I went a step farther, removed the camshaft and took the lifters out one 
>> by one.  Squeezing them with my thumb and forefinger, I could very easily 
>> squeeze oil out of 7 of them, while the other 3 would not budge at all. 
>> Same about the 2 brand new lifters I have, can't squeeze them at all.
>> So now, more questions in my mind:
>> a) are the soft ones bad?
>> b) if they are, do I replace them with brand new ones or can I put in 
>> used ones from my Eurovan, privided these are hard?
>> Thanks for all thoughts.
>>
>> Radek.
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>
>
>
> ------------------------------
>
> Message: 4
> Date: Sat, 6 Oct 2012 12:18:34 -0500
> From: Tony Hoffman <auditony at gmail.com>
> To: Radek <radek at uniserve.com>
> Cc: quattro at audifans.com
> Subject: Re: Valve lifters - again
> Message-ID:
> <CAJM_R3rTAyBM6syQ8hark7TYCy6fKYj4cotnt-i0VZNtEcq-Qw at mail.gmail.com>
> Content-Type: text/plain; charset=ISO-8859-1
>
> In addition to what Grant mentioned, you can use used ones. However, let
> them bleed down installed for 24 hrs, or valve bending can occur. Also, if
> replacing with new, use the newer style ones for a V8Q. Also the same as
> the newer VAG exhaust ones (1.8T, 2.8 30V, etc).
>
> These are what I run on my cars, when I decide the tic-tic is too much. It
> usually isn't ;-)
>
> Tony
>
> On Sat, Oct 6, 2012 at 11:06 AM, Radek <radek at uniserve.com> wrote:
>
>> So now, more questions in my mind:
>> a) are the soft ones bad?
>> b) if they are, do I replace them with brand new ones or can I put in 
>> used
>> ones from my Eurovan, privided these are hard?
>> Thanks for all thoughts.
>>
>