HELP!! What size is the differential fill/drain plug hex key?

jrt67ss350

jrt67ss350

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Well, I was told it was a 17mm allen key, so I went to Sears and got one today before I got started changing the fluids. $10 for the fool thing!

Anyhow, I get under the car, and the plugs aren't 17mm!! The 17 mm allen key is way too big. I have a set of metric allen keys, but the largest one in my set is 8mm, and that is too small.

So, what size are these things on a 325e?? I would guess either 10 or 15 mm, but I hate to guess wrong and buy the wrong size again.
 
xLibelle

xLibelle

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if its not 17, then its 15.... uhhh

i was gonna say, give me a sec and i will measure my clutch stop screw head, but i dont have my car. maybe later when my friend gets home .... he can check my car for me
 
jrt67ss350

jrt67ss350

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I found it on the internet - it requires a 10 mm hex key.

The 17 mm is aparently for the transmission plugs. However, my transmission just has normal hex bolt head plugs that you can put a wrench or socket on. Go figure.
 
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epj3

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jrt67ss350 said:
Stupid bentley doesn't tell you what size the things are (How hard would it have been for them to put that in there?? [poke] ). The official tool (yes, believe it or not, BMW has yet another special tool to unscrew a plug) uses a 10mm allen.
Click to expand...
BMW has a lot of special tools that in reality are the exact same thing - except slightly different - than a normal tool.
 
mjbst111

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jrt67ss350 said:
Well, I was told it was a 17mm allen key, so I went to Sears and got one today before I got started changing the fluids. $10 for the fool thing!

Anyhow, I get under the car, and the plugs aren't 17mm!! The 17 mm allen key is way too big. I have a set of metric allen keys, but the largest one in my set is 8mm, and that is too small.

So, what size are these things on a 325e?? I would guess either 10 or 15 mm, but I hate to guess wrong and buy the wrong size again.
Click to expand...
wow man, HUGE apologies on the incorrect info.

I swear i took mine out with the 17mm before.... Very sorry about that inconvenience.
 
jrt67ss350

jrt67ss350

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Don't worry about it!! [thumb] Apparently some of the manual trannys use a 17 mm allen key for their fill and drain plugs (maybe that's why you had a 17 mm??), but myy tranny has hex head bolts for the fill and drain plugs.

The diff fill and drain plugs require a 10 mm key (I know for sure now, because I successfully changed the fluid yesterday). Sears gladly refunded me for the 17 mm allen key.
 
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