WTB Oil gage rod and cap TCM PN 656616-3 (dipstick))

[admin]

from a TSIO-550-E

The possible sources I have tried include the factory/AirPower and every stateside salvage yard - which are TNTL (too numerous to list) so this would likely only be answered by someone with a bunch of engine parts or an engine they are parting out. I wish I could be more hopeful about this.
I am using a correction scale on my current dipstick.

Last edited by admin on Fri Oct 18, 2024 8:33 am, edited 1 time in total.
Reason: WTB

HI, Bryan. I have a similar issue. During my engine overhaul, I had the choice between an 8 quart pan on the IO-550N and a 12 quart pan. The engine came from a wrecked Cirrus, with the 8 quart pan. The IO-520 pan, which I got used, is a 12 quart pan, and fits fine, also providing a larger oil quantity. As with you, I have used a conversion scale for the 8 quart dipstick, but would prefer a properly marked dipstick. There are at least a few companies I found on the internet that will fit a custom dipstick. I haven't pulled the trigger on this project yet, but intend to do so soon. If you decide to do that before I do, please let me know what you find, and I'll do the same if I get there first. Jim

Jim,
it doesnt sound like we could just swap; we have the same issue
would love to know where the two 12qt stix got to!
Thks for the tip.
Dave

If my memory is correct, the oil filler tube and caps differ between the 550 and the 520. So it may not be just a matter of finding a 520 dipstick. I’ll make a serious dive into the solution fairly soon, probably at next oil change, so that I can double-check my measurements. I am told emphatically not to try to re-mark dipsticks, however, as mechanical etching may encourage stress cracking and possible failure.

some details...

I checked Dodson also. They have dipsticks but not that part number,

thanks for checking

Thanks, Dave. Those numbers correspond closely to my measurements. Did the charts come from TCM? Jim

Thanks, Dave. Those numbers correspond closely to my measurements. Did the charts come from TCM? Jim

They did, Jim.

Dave: Have you considered having your 616-1 dipstick laser engraved on the back side of the blade? Without looking, my memory is that the -1 dipstick I have is engraved on only one side. That has been suggested to me by a company that builds dipsticks. They don't do experimental work, but have been very helpful. They say that their laser etching equipment is really no different from a trophy engraving shop, and will not change the properties of the blade. Jim