Gary---The usual reasons for float valves to stick open is some form of
dirt holding the needle in an open position. Another cause would be too
much (electric) fuel pump pressure. Since all you did was to replace the
needles with the original, I guess we can rule out pressure.
So far as...was it necessary to change to new oil more than once, I
suppose it would depend on how long raw fuel was standing in the cam
follower bores, and other valleys, before the oil was changed. (Some
evaporization could take place).
If it mixed with the oil, it would all come out with the first change.
Years ago, before detergent oil became the norm, service stations would
encourage car owners to flush their crankcase with kerosene. About a
gallon of this was allowed to circulate thru the running engine for
about a minute, then drained. Some of this had to remain in the engine,
but apparantly no one thought it hurt anything. Again, it would come
down to the percentage of how much of the dilutant was left behind.
Sometimes erring on the side of caution, as you may have done by
changing twice, is worth some peace of mind.
For those owners who store their car over the winter, and might worry
about flooding the crankcase, doing this with less than a half tank of
gas will put the level below the carb floats. Or pinch off the rubber
fuel hose before the pump.
Dick
Gary Fluke wrote:
Jim,
My TR6's engine crankcase filled up with gas due to brand new stuck
float valves, so I put the old ones back in and all is well. Sorry, but
I don't know what brands either the new ones or old ones are. I did
change the oil twice right after the mishap, running the engine very
briefly after the first oil change. I was afraid that just changing the
oil once would not allow for the flushing of areas which don't drain
well, causing the oil to be slightly diluted with gas and therefore
failing to provide the required lubricity.
I am interested to know what others more knowledgeable than me think
about changing the oil twice, rather than once, after gasoline dilution
of the crankcase oil.
Gary
'73
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