Trying to swap diff fluid but the fill plug is facing the fuel tank. I don’t have a tool slim enough to fit between, is there a DIY posted for this? I’ve seen the e34 DIY but it’s clearly a different layout under there.
Is there other disassembly required to gain access to the fill plug?
Thanks for any guidance!
Scroll down to the last two pics on this page. Its a good trick to get at it. You might have to buy a couple items, but if it saves you a headache, do it. Shogun maybe has another idea.
http://bmwe32.masscom.net/sean750/di...OutputSeal.htm
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1992 750iL
That’s interesting, but i don’t have a hex bit or fancy box wrenches lol.
I did it the same way as in the link from unity done by Sean750. The box wrench is a standard one, probably you have that, hex bit is cheap.
Or check in your tool box if you have a hex key wrench Set, use the right size and a pipe as extension for more power.
Note: before you open the drain plug, first see if you can open/remove the fill plug.
And here you have some pics of the drain plug https://www.ecstuning.com/b-genuine-...h/33117525064/
Last edited by shogun; 05-12-2018 at 10:13 PM.
Shogun tricks and tips for the E32 series are HERE!
Some diff fill plugs have a 14mm hex socket indent, which is conveniently close to the 9/16" hex head on a 3/8" bolt. Grip the bolt shank as hard as you can. You may need to file the flats slightly to get it to seat all the way into the socket. If you try this, get at least a Grade 5 bolt (3 hash marks) or better, a Grade 8 (6 hash marks). If yours has a 10mm hex, then I don't recommend this method as the 6mm bolt will surely twist the head off in the socket.
diffw.jpg
You might get lucky and find an all-thread coupler nut or 1/4" NPT hex coupler at Home Depot, etc., to use with a box end wrench as per the previous link:
the-hillman-group-rod-coupling-nuts-45132-64_400_compressed.jpg
Last edited by TheStigg; 05-12-2018 at 10:21 PM.
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TheStigg (aka "gale")
92 735i 5-spd, turbo pending
89 535i 5-spd (may she rest in pieces)
94 325ic 5-spd
87 325is
shoot some pics how you finally did it and which tools you used.
Shogun tricks and tips for the E32 series are HERE!
I have an Allen key set (hex) but only goes up to 10mm. I’ll try to hit Harbor Freight tomorrow and figure something out.
thanks for the ideas, I’m sure I’ll make one of them work for me.
I had the same problem. I bought this wrench from BavAuto and it worked well!
https://www.bavauto.com/bmw-wrench-b8800025
I actually ended up ordering a 17mm stubby hex socket from amazon, it fit perfectly in there. If I remember right upon reinstallation I had to thread it in there the first few turns before my socket and ratchet would fit but it did allow the use of a breaker bar to get it loose.
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04 BMW 325xi 143k
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94' BMW 740i 308k miles
Fresh 72k mile engine with all new seals. True E34 Manual Trans Engine Harness. 6spd Transmission Swap, Getrag 420G. RHD LW Single Mass Flywheel. E39 M5 Clutch. E39 M5 Shifter. Factory Car Phone. Factory 6CD Changer. Factory Electric Sunshade. Not So Factory Factory Electric/Heated Rear Seats. E38 Heater Valves. E43 M5 calipers/brakes
Sold:
1996 Oldsmobile Aurora; 194k miles but with a bad paint job and dented fender resulting in a payout to buy the 740i
I’m feeling dumb now. I never bothered to actually try to match up my Allen key to the plug.
the plug is not 14mm it’s actually 10mm (Allen key) which i do have.
So basically all i need now is a pipe to extend off the Allen key, but short enough to clear the floor. (No lift here)
How about an angled pipe as enforcer? which E32 do you have, maybe it depends on the size of the final drive? Double check the size of fitting allen key.
Bentley manual says on page 331-1 and there is no difference between E32 models:
Use a 14mm allen bit socket to remove the drain plug. Alternatively cut approx 30mm (1.2 in.) from an allen key and use an open wrench on the key stub.
tightening torque
oil drain plug 70 Nm 52 ft-lb
oil fill plug 70 Nm 52 ft-lb
EDIT: just checked on my spare final drive which comes out of an 11/1993 750iL = large case final drive, the fill plug is not 14mm it’s actually 10mm (Allen key), confirmed to fit.
The drain plug is with hex head.
Bentley is wrong here.
Last edited by shogun; 05-14-2018 at 12:07 AM. Reason: added info
Shogun tricks and tips for the E32 series are HERE!
See photo, both my plugs were 10mm Allen. Removal required a box wrench extension and busted knuckles.
fresh fluid is in, success!
thanks all!
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