moosepileit
Well Known Member
I cross threaded a tube stem 30 hours ago. The valve cap on the left, with less rubber seal in it, caused a leak. It would thread on 4 turns. The replacement cap, on the right, from a spare tube, threads on 2.5 turns.
The cap on the left held air for 30 hours and more than 50 taxi, takeoff and landings.
Checked tire, tube, wheel, no issues.
Inflated to 40#, removed cap several times and heard a faint momentary sizzle of air- (that stopped).
The cap on the left held air, until it didn't. It threaded on deep enough to depress the stem.
So, if you'e ever cross threaded and fixed tube stem threads, check that your cap looks like the one on the right and doesn't thread on too many turns.
The cap on the left held air for 30 hours and more than 50 taxi, takeoff and landings.
Checked tire, tube, wheel, no issues.
Inflated to 40#, removed cap several times and heard a faint momentary sizzle of air- (that stopped).
The cap on the left held air, until it didn't. It threaded on deep enough to depress the stem.
So, if you'e ever cross threaded and fixed tube stem threads, check that your cap looks like the one on the right and doesn't thread on too many turns.
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