C-85F engine question
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C-85F engine question
Dear all,
hoping that someone may be able to shed some light on this ....
I flew yesterday for an hour and it was cold, minus 4C on the ground, and when I got back looked in the engine and saw goopy stuff on the outside of my gascolator. It was soft to the touch, maybe solidified because of the cold, but what is it and where did it come from ?
The drip pattern suggested it had come from above, there was a small 'droplet' of it on the lower back edge of the generator and small splashes on the firewall behind/above the gascolator.
The engine does weep a little oil, I think it’s from the gasket on the oil sump, but this ‘mystery liquid’ was slightly more viscous, almost like waxy grease, any thoughts ?
thanks
Graham
hoping that someone may be able to shed some light on this ....
I flew yesterday for an hour and it was cold, minus 4C on the ground, and when I got back looked in the engine and saw goopy stuff on the outside of my gascolator. It was soft to the touch, maybe solidified because of the cold, but what is it and where did it come from ?
The drip pattern suggested it had come from above, there was a small 'droplet' of it on the lower back edge of the generator and small splashes on the firewall behind/above the gascolator.
The engine does weep a little oil, I think it’s from the gasket on the oil sump, but this ‘mystery liquid’ was slightly more viscous, almost like waxy grease, any thoughts ?
thanks
Graham
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Nick,
thanks for your reply, I received this suggestion from elsewhere too, and yes the oil breather is in similar place, port side of fire wall, probably 6" from gascolator.
I have also received suggestions of possible breakdown of rubber shaft seal on the generator or burned oil from a crack in the piston ring wear area of a cylinder barrel.... I have a slight oil weep which leaves oil smearing on the gascolator but this remains normal viscosity and did so on this day too, the 'goopy' deposits were something quite different.
thanks
Graham
thanks for your reply, I received this suggestion from elsewhere too, and yes the oil breather is in similar place, port side of fire wall, probably 6" from gascolator.
I have also received suggestions of possible breakdown of rubber shaft seal on the generator or burned oil from a crack in the piston ring wear area of a cylinder barrel.... I have a slight oil weep which leaves oil smearing on the gascolator but this remains normal viscosity and did so on this day too, the 'goopy' deposits were something quite different.
thanks
Graham
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I have known of breather pipes freezing up in weather like this - a mate blew out a crankshaft seal last year on his Pitts.
Of course all had defrosted and was aparently OK in the hangar afterwards - that is, except for a small plug of icy emulsion goop under the outlet of the breather tube....
Hope this helps
Adrian
Of course all had defrosted and was aparently OK in the hangar afterwards - that is, except for a small plug of icy emulsion goop under the outlet of the breather tube....
Hope this helps
Adrian
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