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A 65 oil leaks
Why does the puchrod tubes leak oil? Is there an good fix them?
Len
Len
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I loved airplane seens I was a kid.
The T- craft # 1 aircraft for me.
Foundation Member # 712
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Len:
they leak because the tubes are a steel tube pressed into an aluminium head with no means of sealing (other than a bead in the tube which presses against the inside diameter of the hole it sits in). Differential expansion, vibration etc always causes leaks between the metal-to-metal contact.
The cure:
1. Re-bead the steel tubes periodically using a pushrod tube re-beading tool, and a smidgin of sealing compound. No cylinder removal required, but the rocker covers, rockers and pushrods need to be temporarily removed.
2. Or replace each pushrod tube with a sealed assembly, quite expensive but details can be found in the Aircraft Spruce catalogue.
Rob
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