On Tue, 29 May 2001, Faure, Marin wrote:
:We've talked about the potential valve seat recession problems
:in the 2.25 petrol engine as a result of the elimination of leaded
:gasoline in this country (US). I'm curious if the owners of
:2.25 diesel engines are facing similar potential problems as the
:sulfur in diesel fuel is phased out? Our trawler, which was built
:in 1973, is fitted with two, large, six-cylinder diesels. These engines
:were designed to be run on fuel containing sulfur. I don't know why
:the fuel companies put sulfur in diesel fuel, but they did. Now the sulfur
They didn't put it in, they just neglected to remove it. Sulfur occurs
naturally in crude oil, and may be a byproduct of distillation (sulfur
content is certainly controllable by distillation processes). It's in the
fuel because it's more expensive to make fuel without it.
Low-sulfur fuels can be a problem for fuel pumps, distributor pumps, and
injectors, as these things are often dependent on the lubricity of fuel.
I don't think there are problems with valves and valve seats. I've
certainly never heard of any. High-quality low-sulfur has additives
already in compenstate for lack of sulfur. I think there are some
standards for this. Check with your fuel supplier.
-- dscheidt@tumbolia.com Bipedalism is only a fad.
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