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Old 06-29-2007, 06:12 PM   #1
CaptRick OP
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HELP O2 sensor removal and Y pipe

OK I am trying to install a Y pipe on my 1150GS. I got the muffler off, no problem, dropped the cat but I cant get the dam O2 sensor loose for the life of me!!!
Before I resort to violence, am I missing something really simple????
Any one else have a problem with the dam thing?
It looks like a simple nut to turn and loosen????
Help please I want to ride tomorrow AM early.....
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Old 06-29-2007, 06:35 PM   #2
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If memory serves me , you have to trace the O2 sensor wire to it's source, which I believe is under the fuel tank and unplug it from there, then spray the O2 sensor in the cat with WD40 or Liquid Wrench and let it soak in and then you shold find it'll come out with ease. Install it in the Y pipe, etc..

You could take the easier way and try to get the O2 sensor without unplugging it first, but the twisting of the wire might break it.
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Old 06-29-2007, 06:47 PM   #3
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If you have the sensor unplugged, slip a 6 or 12 point box-end wrench on there, tip the catalyst onto it's side, and give the wrench a whack with a hard metal-head hammer. Just remember, lefty loosey

Reinstall the sensor into the y-pipe with any flavor of anti-seize. Any flavor will work because at max torque, the exhaust temp isn't ever much more than 600C right at the cylinder port. And is cooler by the time it reaches the sensor. After the catalyst it warms up again.


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Old 06-29-2007, 07:52 PM   #4
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*#%$@#%^&*&^%()
Blast dam O2 sensor!!!!
Arghhh walk the plank yer scum dog
Ill nail yer tits to the table bitch
happy place happy place.......
anger managment.....
Ok I took offf the gas tank unpluged the sensor and willlet it soak over night with some liquid wrench, if in the AM I cant get it loose its over to the dealer for a new sensor. Hope its a stock item......
On the plus side the bike is getting a good dusting and cob web removal!
Oh the joys of a BMW, as the germans say YOU WILL DO IT MY WAY!!!
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Old 06-29-2007, 11:41 PM   #5
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It'll likely be a stock item at the BMW store. But there's another option.

If the sensor cannot be removed, you do not need to buy the OEM BMW replacement part. It's a 4 wire heated O2 sensor that's identical to several hundred million installed in vehicles since time began. The only difference is the electrical connector. (And I think the sensor body comes in 2 different physical sizes)

Auto parts stores have 4 wire and 5 wire UNIVERSAL replacement O2 sensors with a wire splice kit included. Cut the OEM cable and connector from the old sensor, and splice in the new sensor.

To avoid the blank stare at the parts store when you say "Its for a BMW motorcycle", tell them its for a 2002 BMW 320. Not that I know that that sensor is the right physical size mind you, but rather it avoids triggering the reflexive response of "We don't have motorcycle parts, sir"

Bring the catalyst with you and physically match up one of the universal O2 sensors. Really there's only like two different flavors.

The 4 wire colors are White-White-Black-Gray. The whites are the heater, not polarity sensitive. Gray is signal ground, and Black is the signal.


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Poolside screwed with this post 06-29-2007 at 11:59 PM
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Old 06-30-2007, 05:27 AM   #6
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Thanks poolside!
If my cycle dealer is out I will hit the auto zone. I had no idea it was a universal thing. I would also think the universal will be a little less coin since it wont come over the magic parts counter. It's magioc cause it turns penny parts into gold plated parts!
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Old 06-30-2007, 05:39 AM   #7
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Quote:
Originally Posted by CaptRick
Arghhh walk the plank yer scum dog
Ill nail yer tits to the table bitch
Oh my!

At least give the WD40 a try
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Old 06-30-2007, 06:18 AM   #8
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WD40 or Liquid wrench should do the trick, no need for violence Just be sure to use a good size wrench and the cat is held in place so it doesn't move.. get a helper! The hardest part is getting the tank off to unplug it. When reinstalling it the sensor, you might want to use some anti seize compound on its threads just in case you have to remove it again without resorting to threats of violence!
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Old 07-01-2007, 03:10 PM   #9
Steve W.
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No O2

Hate to bring this up, but my 01 GS runs just fine sans O2 . It's been unplugged for about 10k miles. Runnng a Y pipe Remus. Without the cat a 02 isn't needed.
Cheers
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Old 07-01-2007, 03:19 PM   #10
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So your saying I went through all that for no reason???

Dammmm....

Well for the record the o2 sensor I am now running is a Bosch # 13231,
it costs half of what the BMW dealer wanted.

I gotit at a local NAPA when the mc shop did not have one in stock, As I sadi earlier the mc shop wanted $ 186.00 at NAPA around $ 92.00.

Went for a 270 mile ride today and it runs great, i will say with the Y pipe there is some poping on deacceleration. Yes I used high temp RTV, it still pops.
The bike sounds a little more gutsy, only sounds I cant tell any performance difference from cat to Y pipe. What I did notice is that the temp runs one bar cooler then it did with the cat.
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Old 07-02-2007, 04:24 AM   #11
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You are ahead of the game compared to me, at least you are using what you bought. I paid full papa for a new OEM sensor when the bike was 1 year old, then I cut the signal lead lead and ran an extension wire out from under the tank so I could get to it for testing.

It's been disconnected like in the picture below for I don't know, two years now? The brown and gray wires are the O2 signal extension leads. You can see they're just hanging there. The sensor still works. They are pretty stout too, the signal lead can be shorted to ground indefinitely with no harm to the sensor.

You can rig something like this if you want, and experiment with twisting the leads together for a time, then disconnect them for a time. See which works better.




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