20-10-2020, 10:11 PM
I note that, at page 18 of my handbook (Publication No: 972B) the following is found:-
""Leaded" Fuels.
"The advent of "leaded" fuels (petrols containing a small proportion of tetraethyl lead) on the British market has led to a number of queries concerning their use and effect in engines.
"Provided that the same reasonable attention is given to valves and adjustments as with ordinary petrols there will be no trouble when using these fuels.
"The appearance of the valves when running on "leaded" fuel, differs from that associated with ordinary petrol, but this is a well recognized fact to which no significance should be attached.
"The deposit from such fuels can be removed by "scrubbing" the valves and their seats with a stiff wire brush of the type used for cleaning files (a file card) after which the valves can be "ground in" in the normal manner.
"We would recommend this method of cleaning for all valves whether they have operated with "leaded" or ordinary fuels as it eliminates the possibility of leaving small amounts of deposit on the valve seats which tend to cause damage, or prolong the "grinding in" process."
""Leaded" Fuels.
"The advent of "leaded" fuels (petrols containing a small proportion of tetraethyl lead) on the British market has led to a number of queries concerning their use and effect in engines.
"Provided that the same reasonable attention is given to valves and adjustments as with ordinary petrols there will be no trouble when using these fuels.
"The appearance of the valves when running on "leaded" fuel, differs from that associated with ordinary petrol, but this is a well recognized fact to which no significance should be attached.
"The deposit from such fuels can be removed by "scrubbing" the valves and their seats with a stiff wire brush of the type used for cleaning files (a file card) after which the valves can be "ground in" in the normal manner.
"We would recommend this method of cleaning for all valves whether they have operated with "leaded" or ordinary fuels as it eliminates the possibility of leaving small amounts of deposit on the valve seats which tend to cause damage, or prolong the "grinding in" process."