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..Only a few drops in the underside cover, but there is evidence that more oil is being blown further towards the back of the car. So, I assume that the leak is happening mostly during driving while hot and the majority ends picked up by passing air and sprayed around the underside of the car.
Sounds like my car too I have 173K miles and yours? I clean it off during the oil change and I get a thin film on the bottom of the bell housing, wiring to the O sensors, and trans pan but no puddles on the under cover and never to the floor. It's the main seal on mine. I use(?)/weep about 1 qt. every 10K miles so I've learned to live with it.
....Has your leak remained fairly consistent or has the flow increased over time?
It seems to have started at about 100K and remained fairly consistent. It's so little that I've even considered some kind of device to contain it (but not stop it) but it's so easy to clean off that I don't bother. It still annoys me though as I don't like any fluid leaks from my cars.
Hi guys! Trying to find source of this leak on my old 02' C240. Friend thought it was coming from the valve cover (1st pic) but I'm just not sure as it's barely showing. Or if it's (2nd pic) coming from the seal and/or just the bongo bolt. Any help would be most appreciated!
-Andrea
Me looking up from ground at the bottom of the valve cover. Seems like too much fluid on transmission area to be coming from here.
Not sure if leak from valve cover up top dripping down to here, the seal, or just the bongo bolt leaking
I assume you've ruled out the "tranmission bushing" aka 'plug' that carries the wiring inside the trans? You could have a rear main leak/weep. How much does it leak? Do you wipe off the oil and check for buildup? Do you add oil between changes? Does the leak ever overflow from the underside cover and on to the floor after you clean it off?
Originally Posted by ericgoh
Yes, the transmission plug was replaced 4 years ago or so and it looks dry. I'm pretty sure this is engine oil since it doesn't have the ATF color. It's not a ton of leakage since the oil doesn't need topping off.
Only a few drops in the underside cover, but there is evidence that more oil is being blown further towards the back of the car. So, I assume that the leak is happening mostly during driving while hot and the majority ends picked up by passing air and sprayed around the underside of the car.
Originally Posted by slammer111
Anyone else have this problem, or any updates?
Hey guys, same questions....Any updates? What's the current situation looking like?
Hello All,
I have a new to me 2001 C240. I went change the trans fluid today and when I dropped the pan I found: A wet trans pan, some oily fluid on the plastic panel(NOT REDDISH) and some oil on various areas at the rear of the engine(Nothing like the amount I used to find there on my C230 Coupe). I read the threads above and I'm not overly concerned and will monitor the oil and ATF use/loss. However I am confounded by the apparent lack of a Trans Drain Plug. Is the topside extraction method the only course I have available? I'm hoping to do the simple drain/filter change/gasket replace on this transmission? I was under the impression this "earlier" 722.6 HAD a drain plug, Please Advise.
ATF oil pan should have a drain plug, torque converter does not. This was eliminated on cars bet. 99/00 or thereabout to a few years later after that. You can use the banjo disconnect method to drain it all, or drain/fill 4 times (with every oil change, after x miles...whatever, you decide) and you will end up with new atf or if you are lucky your car has connector nuts to radiator (like w211s) that you can loosen the return line-i have high-pressure crimp connectors in my 03 c240, no TC drain but I have atf pan drain. So I used the banjo method.
08-09-2011, 01:50 PM
I have 173K miles and yours? I clean it off during the oil change and I get a thin film on the bottom of the bell housing, wiring to the O sensors, and trans pan but no puddles on the under cover and never to the floor. It's the main seal on mine. I use(?)/weep about 1 qt. every 10K miles so I've learned to live with it.
Trying to find source of this leak on my old 02' C240. Friend thought it was coming from the valve cover (1st pic) but I'm just not sure as it's barely showing. Or if it's (2nd pic) coming from the seal and/or just the bongo bolt. Any help would be most appreciated!
