Oil dip stick

[RedButte]

I have an O290-D with standard dip stick and tube. I noticed the same engine that had a much shorter tube and dip stick. I can't find this option in the Lycoming parts manual, was wondering if it is legally available or did someone just modify it.

[frequent_flyer]

I have an O290-D with standard dip stick and tube. I noticed the same engine that had a much shorter tube and dip stick. I can't find this option in the Lycoming parts manual, was wondering if it is legally available or did someone just modify it.

May or may not be related but my YIO-360 has a 2 part dipstick tube comprising of one long section and one short section. I wonder if the pictured tube is that short section. It's easy to make a dipstick shorter.

Caution - any question about how to calibrate the shorter dipsick will result in a discussion of whether the dipstick should indicate the quantity of oil in the sump or the quantity of oil in the engine.

[skywagon8a]

The really short ones screw directly into the case without even that short tube.

[Steve Pierce]

Those are pressed in if memory serves me correctly. I know of some that were replaced and PRC was used to seal the tube to the case.

[stewartb]

No flats to wrench it in, no safety wire? It must be pressed in. I wouldn’t mess with it. You need a funnel with the longer tube, too. Buy a longer funnel and leave it alone. If you think the case is threaded and want a longer tube? I have a Lycoming tube and dipstick on the shelf. I had to change mine for the Superior sump.

[frequent_flyer]

No flats to wrench it in, no safety wire? It must be pressed in.

I had only heard of, and seen, threaded dipstick/filler tubes but found the answer in post 5 of this thread -

https://www.supercub.org/forum/showt...il-tube-length

These seem to be several different lengths of threaded filler tubes but that won't help if the crankcase is not threaded.

[frequent_flyer]

Unthreaded filler tubes are available NOS and used on eBay. I didn't find one as short as shown in the orginal post but they should be easy to shorten to taste. E.g.

https://www.ebay.com/itm/266063637248

[dgapilot]

My O-235 has no tube, just screws right into the case.


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[Cub Builder]

Those are pressed in if memory serves me correctly. I know of some that were replaced and PRC was used to seal the tube to the case.

Your memory is correct. I have an O-290-D originally out of a SuperCub apart in the hangar for overhaul now. This one is pressed in.

-Cub Builder