Large 3.91 lsd oil capacity?

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Nato_e30
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Post Sat Dec 08, 2012 9:57 pm

Hi guys ive just brought a large case 3.91 lsd, the problem is the oil fill plug is rounded.... :? so I drained the oil and need to refill it through the drainage hole before I fit the diff (intime I will get a new rear plate) does anyone know the oil capacity? Thanx in advance :)
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maggspower
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Post Sat Dec 08, 2012 10:01 pm

1.7 litres :D
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Rav335uk
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Post Sat Dec 08, 2012 10:16 pm

maggspower wrote:1.7 litres :D
You know he means Medium case.
Thought they needed 900ml
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Nato_e30
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Post Sat Dec 08, 2012 10:16 pm

Much appreciated maggs :cool:
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Nato_e30
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Post Sat Dec 08, 2012 10:17 pm

Its 8 bolt back plate mate im sure its big case mate
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Rav335uk
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Post Sat Dec 08, 2012 10:20 pm

Medium Case Graham, if it's the one you painted.
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maxfield
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Post Sat Dec 08, 2012 10:20 pm

Big case for E30 but classed as a medium case.

I always thought they only took a litre. Sure that's all I bought last time to fill it.
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Nato_e30
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Post Sat Dec 08, 2012 10:23 pm

Hmmm confused lol geezer I brought it off said it was a big case :?
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Rav335uk
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Post Sat Dec 08, 2012 10:28 pm

Largecase Diffs are on E34/E28's
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maxfield
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Post Sat Dec 08, 2012 10:29 pm

Yeah it is a big case for an E30, But not the biggest in the BMW range.

It is the right diff dude :D
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e30topless
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Post Sat Dec 08, 2012 10:32 pm

medium case - 1.5 litres, I only remember because it pi55es me off buying 2 litres !
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Nato_e30
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Post Sat Dec 08, 2012 10:37 pm

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Thats the diff... so its 1.7L or 1.5L?
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Rav335uk
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Post Sat Dec 08, 2012 10:42 pm

I've seen posts in the Tech section advising 900ml.
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maggspower
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Post Sat Dec 08, 2012 10:51 pm

The largest available diff on an e30 is the medium case. I takes 1.7 litres of oil! :D

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Screen shot from the bentley manual.
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Brianmoooore
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Post Sat Dec 08, 2012 11:42 pm

Listen to maggspower. Ignore all others!
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Rav335uk
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Post Sat Dec 08, 2012 11:45 pm

Brianmoooore wrote:Listen to maggspower. Ignore all others!
Brianmoooore wrote:Whatever the stated capacity, you should fill until oil just begins to flow back out of the filler hole, with the car level.
From

http://www.e30zone.net/modules.php?name ... ht=lsd+oil
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Brianmoooore
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Post Sat Dec 08, 2012 11:52 pm

Rav335uk wrote:
Brianmoooore wrote:Whatever the stated capacity, you should fill until oil just begins to flow back out of the filler hole, with the car level.
From

http://www.e30zone.net/modules.php?name ... ht=lsd+oil
Agreed, but not of much use if you can't unscrew the fill plug!
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Rav335uk
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Post Sun Dec 09, 2012 12:05 am

True, and that should always be the first priority :D
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If you Got "Haters",Then your doing something Right!
CR24v??? Where's it all gone?? LOL
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Demlotcrew
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Post Sun Dec 09, 2012 10:14 am

I take my differential off to fill it on its nose, I overfill by 1l (So 3l in total).

I have bought a whole bunch of AN connectors, just need to get them welded on to the back cover at the top, will save my the job of taking it off every couple of track days :cry:

Have also done a sneaky fill through the pulse sensor holes when the filler looked like it was never coming off! :o:
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Nato_e30
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Post Sun Dec 09, 2012 1:15 pm

Cheers for the advise guys im going to take the back plate of and drill the old plug out on the lathe at work, re thread it and fit anew plug :)
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