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How best to remove an overfill?

E-Class (W210) 1995-2002: E 200, E 220D, E 240, E 290TD, E 300TD, E 200, E 240, E 280, E 320, E 420, E 430 (Wagon, Touring, 4Matic)

How best to remove an overfill?

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Old 03-12-2018, 05:31 PM
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How best to remove an overfill? SOLVED

SOLVED:

Hey everyone. I've misread my first attempt on this 48 inch transmission dipstick tool, as a result I'm overfilled. The picture shows with an arrow exactly where I registered the level at after a one hour drive, engine continuing running, parked on a flat surface.

How would you best suggest removing the overage? I'm going with a 24 dollar Mityvac at Harbor Freight. But I want to confirm with the experts here if this level reading is dangerous or capable of being ignored? It's a 722.6 trans in an v6 2001 e320. I remember reading someone saying there's a blow off if too much oil is present?

Dang it! Missed the mark.

Last edited by CanuckMerc; 03-14-2018 at 12:07 PM. Reason: Solved
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Old 03-13-2018, 12:49 PM
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Is that level with fluid at 80C and transmission in D ?
Mityvac is good idea and you should get one for motor oil changes anyway.
I had the 9l unit for years, but friend "borrow it" and then I bought electric pump.
Pump is smaller to storage and easier to operate, but both systems will do the job.
I read somewhere that those transmissions have valve that protect them from fluid overfill, but there is no way to confirm it in real life.
Years ago I bought W123 where seller overfilled ATF. The car drove fine for several miles till on freeway grade everything got hot and ATF blow out venting hole.
Hitting hot muffler it generated cloud of smoke 1/4 mile long.
Did not catch the fire, but I would not recommend the experience.

Last edited by kajtek1; 03-13-2018 at 12:52 PM.
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Old 03-13-2018, 01:05 PM
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Hey Kajtek! Yes that measurement was taken after a one hour drive, parked on level surface with the engine running and in Park.

I've pulled out a liter and a half so far before the 1/4 tubing wasn't able to suck out anymore from the dipstick, I'm sure the system was just too warm and the hose too flexible to maintain a seal. I'll try pulling a bit more out today but the level at current is just above the star point, still high.

I can't imagine how I was able to drive this car from Winnipeg, Manitoba, Canada all the way here to New Mexico without a single symptom of an overfill until just last week! The car isn't a daily driver and maybe that has something to do with it but dang, that was a few thousand kilometers down to here. Amazing the seals didn't blow on me at all.

I never saw any smoke but then again, my car was PACKED and all I had was the side mirrors...then again I'm sure I would have seen a blast of blue had it happened.

It is truly a mystery to me.
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Old 03-13-2018, 03:05 PM
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W210 Transmission tubes have sharp curve that is catching even factory dipstick if inserted in wrong position.
So I think your 1/4" tubing got stuck on it. You should have 1/8" tubing in the kit, that should make it to the pan bottom.
Your experience does confirm that 722.6 transmission is design to hold the overfill, where the older models would simply spit.
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Old 03-13-2018, 03:20 PM
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That is correct. I had cut a 4 foot section and it wasn't able to get past that last curve. I had planned today to go back to the store and pick up a smaller diameter to get into the pan and get the remainder left, I'll got with a 1/8.

I'm amazed the 722.6 is designed to hold overfill, but then it explains how I could have driven this so far, then drove it for almost two years to this point without a single sign of a leak. The only reason why a small bit leaked out was because I had this car sitting parked and covered for 6 months, firing it up and of course the seals would have dried.

The leak hasn't persisted at all since over a week now and with this extra fluid drained out, I'm sure she'll be good until I pull it out of the car for a full seal rebuild project in a year or so.
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Old 03-13-2018, 09:15 PM
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Originally Posted by kajtek1 View Post
....Your experience does confirm that 722.6 transmission is design to hold the overfill, where the older models would simply spit.
CanuckMerc,

Not to hijack your thread here:
Question for kajtek1: when you say "older models would simply spit.", are you referring to the previous years of the 722.6 trannys? (What specific years?) or perhaps previous model transmissions?
Cheers
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Old 03-14-2018, 12:02 PM
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I just lossen atf line at radiator
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Old 03-14-2018, 12:06 PM
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Hijack away! I'm not possessive about open conversations!
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Old 03-14-2018, 12:07 PM
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Interesting. I got say the first time for me using a brake bleeding hand pump and 1/8 vacuum line. Worked like a charm and no mess!
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Old 03-16-2018, 12:44 PM
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Originally Posted by khomer2 View Post
CanuckMerc,

Not to hijack your thread here:
Question for kajtek1: when you say "older models would simply spit.", are you referring to the previous years of the 722.6 trannys? (What specific years?) or perhaps previous model transmissions?
Cheers
I was referring to older, transmissions before 722.6 era.
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