Diesel fuel engine flush.. was RE: Valve lifters - again

[Pat]

This discussion reminds me of a tech that said use a quart of diesel with
the oil in the crankcase.
He runs it for a minute or so, then drains and adds new oil and filter.
Says it works better than anything else.

Anybody heard of this or any experience with it?
 

-----Original Message-----
From: quattro-bounces at audifans.com [mailto:quattro-bounces at audifans.com] On
Behalf Of Steve B
Sent: Monday, October 08, 2012 12:47 PM
To: Qlist
Subject: Re: Valve lifters - again

I never disassembled any, but I did run some Marvell Mystery Oil in my
5kCSQA to try to quiet noisy lifters a hundred miles or so before an oil
change.  They were quiet right after the oil change, but put up a terrible
racket shortly thereafter ... I ended up having to pull the cam and replace
them.

I suspect the bores wear, sealed by oil residue, and any attempt to clean
them will result in causing oil to leak around the piston.  I've decided
that if I'm not going to replace them I'm going to leave them as they are
(no attempt to clean them to quiet them).

Steve Buchholz

Grant Lenahan <glenahan at vfemail.net> wrote:

>now THAT's an answer.
>
>I learned too
>
>$8 huh?
>
>Grant
>On Oct 8, 2012, at 6:59 AM, Tony Hoffman wrote:
>
>> Radek,
>> 
>> Yes, you can take them apart. BTDT with plenty, they are generally gummed
>> up and some good brake parts cleaner will clean them nicely. There are
five
>> parts IIRC. The bucket, the small insert part in the bottom, and then a
>> keeper, spring, and small ball valve. Clean everything and reassemble.
>> 
>> To take them apart, put it the way it goes in the engine, and hit it HARD
>> on a piece of wood. The bottom insert piece will come out. I wrap it in a
>> rag to do this, make sure you use one that can go in the trash after, as
it
>> will have holes in it from hitting (remember the HARD comment?).
>> 
>> However, having done this on my personal cars several times, I'd say I've
>> still had three or four that did not quiet (out of probably fifty I've
>> done). So in the end it's not worth the effort for me. I just buy new
ones
>> for a V8 these days. about $8 each, well worth it for my time of removing
>> the cam.
>> 
>> Tony
>> 
>> 
>> 
>> On Sat, Oct 6, 2012 at 4:48 PM, Radek <radek at uniserve.com> wrote:
>> 
>>> They look clean on the outside, is there a way to take them apart?  Or
>>> flush them with a solvent?
>>> Radek.
>>> 
>>> Dunno. I'd focus on making the ones you have work right - there's not
much
>>>> to them; two halves, a valve.  If they aren;t >badly worn, and they are
>>>> clean, they should work.  I expect they are not so clean
>>>> 
>>> 
>>> Grant
>>>> On Oct 6, 2012, at 4:37 PM, Radek wrote:
>>>> 
>>> 
>>> 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.
>>>> 
>>>> ------------------------------
>>>>> 
>>>> 
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