It's definitely not new, but with all the new oil flowing over it lately, it's not getting any crud on it. Honestly, I expected to get laughed off the forum and have my account locked by the mods for asking such, as I figured someone would say, "No seal allowed, because of the risk of the engine ingesting it."I was gonna guess it is a NEW dipstick.......
Never seen an old one that clean...
It's definitely not new, but with all the new oil flowing over it lately, it's not getting any crud on it. Honestly, I expected to get laughed off the forum and have my account locked by the mods for asking such, as I figured someone would say, "No seal allowed, because of the risk of the engine ingesting it."
It's definitely not new, but with all the new oil flowing over it lately, it's not getting any crud on it. Honestly, I expected to get laughed off the forum and have my account locked by the mods for asking such, as I figured someone would say, "No seal allowed, because of the risk of the engine ingesting it."
It's been awhile since I've had my A75 apart, but at least on it, I think I recall it having a screen on the pickup tube that went into the oil sump. So in theory on my engine it would still be in the sump. Not sure about others.
That'd probably bug me enough that I'd take apart the entire airplane into little pieces in search of the original o-ring.
There are some references, now maybe someone who actually knows (TomD) will answer.
There are some references, now maybe someone who actually knows (TomD) will answer.
In recent years, TCM has supplied oil gauge rods with new and rebuilt engines. At times, TCM
has not been able to identify the specific oil gauge rod required for an engine, or supplied the
incorrect oil gauge rod due to field conversion of the engine from one model to another or a
change in engine specification in the field.
After all the discussion in the thread about the oil leak, I began to wonder, is my dipstick missing an o-ring?
Sure looks like a place for one, what say you?View attachment 38023
It's been awhile since I've had my A75 apart, but at least on it, I think I recall it having a screen on the pickup tube that went into the oil sump. So in theory on my engine it would still be in the sump. Not sure about others.
That'd probably bug me enough that I'd take apart the entire airplane into little pieces in search of the original o-ring.
Jesse, thanks for that, I'll certainly check for the PN when I'm out next but I'm tending to agree there is no ring shown. There actually isn't an oil coming from the neck of the dipstick tube. And, there is a clip that allows the dipper to click into place.http://www.tcmlink.com/pdf2/SIL00-7A.pdf
O-300 on a 172 according to that would be oil dip stick PN 628413A1 which I do not believe has an O-ring.
O-300 on a 170 is a different dipstick according to that.
There are some dip sticks on there that reference o ring MS 9021-011 but neither of the above dip sticks reference an o ring.
Sounds like they've had problems with the wrong dip sticks being used which resulted in that service letter:
OP: Is there a PN on the dipstick? If so what is it?
Jesse, thanks for that, I'll certainly check for the PN when I'm out next but I'm tending to agree there is no ring shown. There actually isn't an oil coming from the neck of the dipstick tube. And, there is a clip that allows the dipper to click into place.
No, my mess is coming from overtightened/mis-installed valve cover gaskets and from leaky pushrod tubes. We only did the left side upgrade kits last year, so this year its time for the right side.
One thing about my O300, I'm beginning to think it likes to drip oil from somewhere. Every time I plug a hole, it comes from someplace else. All the while the breather tube is making mocha lattes on the ramp.
I say you need the part number of the Stick. there are about 5 variations to the dip sticks used on the TCM engines. some have an "O" ring some go to a snap clip that holds the stick in the engine.After all the discussion in the thread about the oil leak, I began to wonder, is my dipstick missing an o-ring?
Sure looks like a place for one, what say you?View attachment 38023
what make model of engine used in what aircraft?
The 170 alone has 3 different dip sticks used.
there are some applications that have both a snap clip, and an "O" ring.
when a 170 has the 0-300-D there is no proper dip stick. any one using that application uses the 0-300-D stick and knows 6.5 quarts indicated is 8 qts in the engine.
So... the bottom line =
you may have the wrong stick in the wrong engine in a wrong aircraft.
Yes you should have a clip, and an "O" ringit's a 66 172G w/ the O-300D engine.
My current dipstick has factory markings on one side and my scribed markings on the other. They're 2 qts different. Simple stuff for an owner. Not as simple for a renter or club guy. Ask.
That's an interesting thought...could that be why my engine throws anything > @ 5 qts overboard? I assume the factory marks were artificially low, meaning you showed 6 qts after adding 8 bottles of oil?The scribed lines I referred to were scribed by me to accurately show a known quantity of oil that I had just put i
n and run in. The point was that my lines are two quarts different than the factory's.
That's an interesting thought...could that be why my engine throws anything > @ 5 qts overboard? I assume the factory marks were artificially low, meaning you showed 6 qts after adding 8 bottles of oil?
I have two IO-470-VO's on my plane. The dipsticks look a little different than your's but yes, in the groove in the same area as your's I do have o-rings.
I have verified the part numbers of my two dipsticks and they are correct for each engine. The left engine shows known quantity after oil change/run-up perfectly. The right engine is exactly two quarts low as well. I didn't scribe anything but just keep it in mind.The scribed lines I referred to were scribed by me to accurately show a known quantity of oil that I had just put in and run in. The point was that my lines are two quarts different than the factory's.
Mines the exact same.Or it's just a normal plane, mine shows what I put into it, that said it like a hair over 9 out of 12 qts, much over 10 it just end up on the belly. Just airplanes being airplanes
I have verified the part numbers of my two dipsticks and they are correct for each engine. The left engine shows known quantity after oil change/run-up perfectly. The right engine is exactly two quarts low as well. I didn't scribe anything but just keep it in mind.
They are canted differently. Inboard sides of the engines are slightly lower than outboard sides. Both dipsticks are on the left side of the engines (as viewed from the pilot seat). They are suppose to be calibrated with this in mind as they each have a different part number.Are the engines canted differently (opposing cylinders not level due to wing dihedral)? Or do twin's engine mounts take that into account so each engine sits flat relative to the ground?
Not until some gives me a positive ID on the engine.There are some references, now maybe someone who actually knows (TomD) will answer.
Look like I got a missing oring? IO-470F
That might be the groove that the snap ring grabs when the dipstick is fully inserted. I'll look at mine the next time I'm at the airport to check...If you don't get a REAL answer in the meantime.