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transmission pan torx bolt torque

79K views 8 replies 7 participants last post by  khomer2  
#1 ·
The DIY sticky here says 8 nm.

But this website for 722.6 says 106 inch pound which converts to 12 nm.

MercedesShopWiki: 722.6 Transmission Fluid and Filter Change

So which is correct? I recently dropped my pan and changed filter and tightened to 8nm and there seems to be a very slight leak at the rear of the pan.

I was wondering if I should have used the 12nm torque figures.
 
#2 ·
Don't think it really matters. Those transmissions pans are not bolted directly, but the metal clips that hold them have solid base. Meaning no matter what torque you apply, it makes no difference for the gasket.
Breaking. or loosing the bolt is potential for different issue.
I didn't use torque wrench on mine at all.
 
#8 ·
Don't think it really matters. Those transmissions pans are not bolted directly, but the metal clips that hold them have solid base. Meaning no matter what torque you apply, it makes no difference for the gasket.
Breaking. or loosing the bolt is potential for different issue.
I didn't use torque wrench on mine at all.
“Metal Clips”? I do not have any clips at all…..is there a part number I’m missing?
zeke
 
#3 · (Edited)
Do the

8-12nm in steps, however he may have not pointed out in the diy to place the pan on a flat surface to make sure it is not warped.
ohlord:bowdown:
 
#4 ·
The DIY sticky here says 8 nm.

But this website for 722.6 says 106 inch pound which converts to 12 nm.

MercedesShopWiki: 722.6 Transmission Fluid and Filter Change

So which is correct? I recently dropped my pan and changed filter and tightened to 8nm and there seems to be a very slight leak at the rear of the pan.
I was wondering if I should have used the 12nm torque figures.
Yumling,
After how many miles did you drive before you saw the leak ?
I just did mine this morning and got worried because I used the wrong tool to loosen the drain plug. Resulting to shaving the metal until I could no longer loosen it. So I just losened the 6 screws being carefull.
Upon returning the pan, I just made sure they were all fitted well starting with the front , the one whose clip won't come off , and then criss crossing. That was G-
AMG's diy and it worked.
I am checking for leak, drove for 30 miles with different speeds and prayed hard, and still no leak. Thank God.
I did not over tightened the 6 screws. I think that's the secret, or else the gasket will flatten and serve no purpose. Probably 9 lbs. . I used my wifes weighing scale to see how much it feels to make an 8 to 10 lb push with my hand. I am crossing my fingers still.
 
#5 ·
List of Torque Values

Just to prove I am not just "pulling numbers out of the air", I have enclosed the Mercedes Benz, official Workshop Manual (WIS) torque values.

I think I would trust this as a higher authority than some after-market manual which states 12Nm.

Also, does one normally check for warped parts if there is no history of leak, etc???
 

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#6 ·
I believe in your 8nm torque value. Just that I read other figures. My suspicion is that 8 or 12 nm is still ok. You just do not want to strip it.

Just to prove I am not just "pulling numbers out of the air", I have enclosed the Mercedes Benz, official Workshop Manual (WIS) torque values.

I think I would trust this as a higher authority than some after-market manual which states 12Nm.

Also, does one normally check for warped parts if there is no history of leak, etc???
 
#7 ·
No question

as to the 8-12 nm and to the warp issue we have had several members remove non leaking pans only to set them down and find severe warpage from the factory that required a little massaging to get straight again for proper gasket seal.
ohlord:bowdown: