Pagoda SL Group
W113 Pagoda SL Group => Drive train, fuel, suspension, steering & brakes => Topic started by: rgafitanu@gmail.com on May 29, 2017, 12:52:23
-
Started a new thread. The leak appears to be coming from the transmission vent. I am trying to attach a short clip that I took with a snake camera. anybody knows about this vent? It appears to be a 10mm hex bolted onto a cap, below there is a body with 17mm or 19mm hex. The 10mm bolt is very tight and I couldn't turn it. The big hex may require a slim wrench.
-
It should not leak out the vent unless the transmission is overfilled or possibly the wrong fluid is foaming.
-
The one on the bottom is the vent that I unscrewed from the transmission and the one on the top is what I got as a replacement. Obviously I could not replace the original so I added a sealing copper washer and put it back. Is this an early version of vent?
-
I agree with Joe and these are just open vents with a cover. No check valves or seals other than the sealing ring at the threads. If it foams up into the vent, it is something other than the vent unless it is itself clogged. The replacement shown is very much like the vents on both my rear axle and my auto transmission on my '68 280SE. Your original is just like the vent on the manual trans case on my '60 220SE W128. Both I have taken apart.
I really do not see why the old vent can not be reused. I did just that on my 220SE and just re-plated the parts. Good as new. The replacement vent is just a cheaper version of the old one. Less parts but does the job. On the replacement type vent, you can easily pry the top off and inspect to see if clogged. Also with the replacement type, check that you can blow air into it with the cap held down. If not, it could be a bad vent. I had a new one like that and sent it back to the Classic Center a few years ago. It should have a small groove that allows air to pass even if the cap is held down.
-
Thank you Wallace.