Larry wrote,
>After a pollution tax was added to leaded petrol in Finland, leaded
fuels
>disappeared in few months. I have used 98/99 petrol with sodium
additives
>(these are added at oil refinery, and such petrol is available here at
>every gas station). Now I have run my Mk 4 for three years with no
problems
>with exthause valves, seats or guides, neither elsewhere in the engine.
>
>I have heard, that about 1 to 5 % of old engine types can not use
petrol
>with sodium additives, and a valve-seat conversion must be done.
Obviously
>Rootes unit is among those 99 % lucky ones.
>
>Larry, Helsinki
I'm not sure if the Alpine engine is really equiped to deal with no-lead
fuels in the long run. Dont get me wrong here "no criticism", I really
dont know.
The valves are not stainless, as the newer engines are, and the valve
giudes are cast iron.
I've heard rumors that the seats are stellite, which should be OK for
lead free fuels.
Since none of us are really likely to put enough miles on one of these
cars to really know if our motors are up to snuff, I doubt we will be
certain for some time now.
Anyone know what the stock seats are made of?
Some will argue that the Petrochemical Society wanted to convince us
that we really
needed these lubricants in our fuel, when in reality we may not.
Anyone have any data regarding the removal of of Tetra-Ethyl-Lead from
fuel, and its effects upon the life of valves and seats?.
Jarrid Gross
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