Tat..Tat Noise in Engine

[LL - NY]

I had lifter tap from my 200Q, sometimes at startup (after a LONG cold sit,
as
in storage) and surprisingly after a typical 40 - 50 second autocross run
(it didn't
do that very often, there's better iron out there for that purpose).
Contrary to Eric,
I had the most trouble with Castrol (Syntec) and the least with Mobil 1. Car
did
always (since I had it, from 80 K mniles to 198 K miles) have synthetic, and
I
did an engine flush (Rislone) once at around 110K miles, just to hope to
kill the
tap. It never worked. YMMV.

LL - NY

On 7/6/06, Huppert, Eric <eric.huppert at us.army.mil> wrote:
>
> Max,
>
>
>
> Have had experience with the lifters tapping in several older Audis. My
> first
> 5000TQ tapped on startup until 400k. My 89 200TQ still has some light
> lifter
> noise on startup with 300k. (Thankfully my 91 20v doesn't) Both cars
> quieted
> down once run for a minute or so.
>
>
>
> Found that some brands of oil just didn't work well, even right after oil
> change. I've had good luck with Castrol and (believe it or not) Havoline!
> (Synthetic believers flame away!) 700k between two cars using conventional
> oil works for me, then again these cars were commuters, mainly highway
> miles!
>
>
>
> Also could tell when oil was starting to break down as the lifters would
> tick
> a little longer than normal.
>
>
>
> Eric
>
>
>
>
>
>
>
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