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Old 02-20-2011, 07:49 PM   #46
Stagehand
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Quote:
Originally Posted by fishkens View Post
Correct you are. But how do millions of oil pressure senders hold back 80 psi while a few hundred (maybe a few thousand?) airhead neutral switches leak? It's got to be that our neutral switches fell off the caboose of the train of technology.
I dont think the switching action is the same. The neutral safety switch has a long lever arm, and has to touch the transmission parts to physically bump it closed in a hot oil bath, and the oil sensor just needs to feel liquid pressure, essentially, and on a very small point of actuation.
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Old 02-20-2011, 07:54 PM   #47
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No that's bigger. I just checked

Oilhead sump and FD drain plugs- 14x1.5
The FD for K's are the same too 14x1.5
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Old 02-20-2011, 08:02 PM   #48
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I dont think the switching action is the same. The neutral safety switch has a long lever arm, and has to touch the transmission parts to physically bump it closed in a hot oil bath, and the oil sensor just needs to feel liquid pressure, essentially, and on a very small point of actuation.
Yep, it's very different. I'm just extrapolating. Partly because it also seems that these neutral switches are failing at a much higher rate lately. My original was good for 15 years. Others have said that too. I never had a problem with these on my 78 or 76. I'm thinking that the latest batch of a few hundred was bad and that's what we've been getting lately. Something was left out of the plastic compound because a bean counter wouldn't buy that ingredient...or something.

All I'm saying is that we seem to have the technology to make these so they don't leak. We've done it before and it seems we can do it again.
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Old 02-20-2011, 08:12 PM   #49
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If you look at the sealing washer can't even call it a o-ring you'd understand why there's a problem. The inner plastic rotated easily by hand. Heck at least an o-ring would compress!!

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Old 02-20-2011, 09:01 PM   #50
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I still have the bolt Datchew cut off for his plug Sorry, man! I'll bring it by when I get a chance.

Oh, and yeah my first one leaked so I replaced it. I took my gearbox back to Nathan that last time and he put in a different neutral switch that was backwards to mine. The neutral switch came on when I was in gear. At that point I was tired of taking him the gearbox so I jumped it out. I'd like to have a working neutral switch but I won't spend money on them when they have such a high failure rate.
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Old 02-20-2011, 09:26 PM   #51
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Originally Posted by bmweuro View Post
Looks like a K100 or K75 final drive fill plug.
nope it's a 12, those are 14
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Old 02-20-2011, 09:27 PM   #52
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Airhead air injector plugs same size as oilhead rear diff drain, maybe this is same size as that?
nope.
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Old 02-20-2011, 09:32 PM   #53
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It's just a bolt. It doesn't have to be a BMW part made purely of metal mined in the motherland.
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Old 02-20-2011, 09:59 PM   #54
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It's just a bolt. It doesn't have to be a BMW part made purely of metal mined in the motherland.
That's only half of the requirement. It also need to be blessed by der Vater deep in a cave in the Black Forest.
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Old 02-20-2011, 11:10 PM   #55
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Nobody says ya gotta use something fancy, but I just like cool plug like this.
Just installed it.
Piece of cake, ( already had the exhaust off anyway.)
I'll find out where this came from and come up with a part number.
the crush ring for it is the same as the oil cooler lines at the engine
#07119963130
OKAY here it is.
This allen plug is the fork fill plug for R100GS
#31422312031 it's rather pricey at $ 8.5
BUT!
the swing arm fill'n drain plug is a hex head and is the thread size, but it's stupidly short and you risk stripping the threads out of the trans case.
# 01119919225 $0.87
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Old 02-20-2011, 11:14 PM   #56
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Try fitting a Harley neutral switch. In 33 years of riding it, I've never had any trouble with the neutral switch on my Harley.
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Old 02-21-2011, 04:35 AM   #57
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This allen plug is the fork fill plug for R100GS #31422312031 it's rather pricey at $8.15
In cases like this I've visited the BMW car dealer. They must have one for a normal price - like say, two bucks.
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Old 02-21-2011, 04:43 AM   #58
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Try fitting a Harley neutral switch. In 33 years of riding it, I've never had any trouble with the neutral switch on my Harley.
I'm sure, the Asians sure do know electrics. German electrics on the other hand........
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Old 02-21-2011, 04:48 AM   #59
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We need to find the alternative. There is ALWAYS an alternative. Is it the 4wd switch in an X5, the reverse switch on an M3, or a switch located on an MZ, KTM or a Porsche.
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Old 02-21-2011, 05:11 AM   #60
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OK, I went and posted the question on the 2-ventiler board. No better way of finding a solution than asking from the source of mfg.
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