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RE: 4000csq valve tapping gone possible cure

How does Shell gas compare to Chevron?


> -----Original Message-----
> From:	Buchholz, Steven [SMTP:Steven.Buchholz@kla-tencor.com]
> Sent:	Friday, October 30, 1998 1:19 PM
> To:	quattro USA; 'Joe Rae'
> Subject:	RE: 4000csq valve tapping gone possible cure
> > by the oils department. Looking down I saw a bottle of STP oil
> treatment,
> > so
> > I bought a bottle. It has been 3 weeks since my last oil change and the
> > valves on the 4000 were tapping quite loudly. So I decided what the
> hell,
> > I
> > would sue STP if the engine blew up ;] then drop in a MC turbo engine.
> > Well
> > I poured about 3/4 of the bottle ( the stuff is like slime) and half a
> > bottle of oil. The next morning I was a little worried to start the car
> > up,
> > but cranking it up and no more tapping. It has been a full week and
> about
> > 800 miles  with still no tapping.???
> > Has anyone else tried this because I am usually very skeptical about the
> > snake oil/ techron additives/oil cleaners but this seems to have stopped
> > the
> > noise.
> > 
> ... not sure I would consider Techron in the snake oil category ... I
> personnaly just buy gas that already has it in rather than to buy the
> bottles ...
> There are a number of products out there that you can add to your oil to
> quiet the lifters.  From my single experience with the '88 5kCSQA at first
> I
> could tell when it was about time to change the oil when the lifters would
> start making noise.  I tried some stuff from Berrymans which did the trick
> almost immediately ... quiet lifters!  The way this stuff was meant to be
> used was that you put it in before you changed the oil and drove it around
> for a week or so and then changed the oil.  After I changed oil things
> were
> still quiet, but I found that over time the noise got louder, sooner after
> the oil change.  It finally got to the point where I replaced the lifters
> ... problem solved.  
> BTW, Audi has some TSBs on this subject as well, and there is one about
> replacing an oil return valve on the spark plug side of the engine.  This
> is
> for the MC, but it may apply to other engines as well.  I replaced this
> valve to no effect ...
> HTH!
> Steve Buchholz
> San Jose, CA (USA)