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Re: Valve Springs
- To: quattro <firstname.lastname@example.org>
- Subject: Re: Valve Springs
- From: Dave Lawson <email@example.com>
- Date: Wed, 10 Aug 94 13:00:00 mdt
- Encoding: 32 TEXT
- Reply-To: quattro
- Sender: quattro-owner
>The valve springs were not replaced when they did the original rebuild of
>the engine, but why should they habe replaced them? The head only had
>about 30K on it. I don't know if Abt put in new springs when they rebuilt
>the head, but when Sport Wheels measured the spring stiffness of the old
>springs (those that survived!) and compared them to a stock spring from a
>10V turbo motor, they said that the old springs were about 30% LIGHTER
>than stock! This leads me to believe that Abt used the stock springs when
>they built the head, and Audi upped the spring pressure in later model
So the stock valve springs that John was comparing were from a late model
>Yes, as a matter of fact he has, but he's never seen a complication quite
>as bad as mine. He thinks that Audi springs from the early days
>tended to break more than the later ones, as evidenced by their having to
>repair more heads with broken valve springs on the earlier model turbo cars
>versus virtually no problems on the later models.
At what mileage on the earlier cars are these valve springs breaking? As you
can see I am beginning to wonder if I will experience this in the future.
>These lubricants wouln't happen to be Teflon based, would they?
They mention a 'Teflon like' substance for oil-shedding applications. Other
compounds listed are moly-tungsten-disulfide for the low friction
self-lubrication dry film, nickle/chrome/aluminum/yitrium for thermal
barrier coatings and copper oxides/vanadium for heat dissipating.
Dave Lawson firstname.lastname@example.org