No_Twilight Posted April 21, 2006 Share Posted April 21, 2006 Remember Derek's 97 R850R that wouldn't run until he changed the motronic and pulled the cat code plug??? It was the At Wit's End thread, http://bmwsporttouring.com/ubbthreads/showflat.php/Cat/0/Number/656822/page/0/fpart/1/vc/1 . Well Derek decided he liked my K-bike and I sold it to him. I took the 850R on trade and now I'm going to leisurely fix it up. I figure the first thing to do is either change or swap the 02 sensor with my other bike to see if that fixes the problem. From the previous thread I see the bosch part number is 13474. Anybody bough O2 sensors from non-bmw suppliers before? Anybody got any tips on removing these w/o cutting the wire? I put a 22mm open end wrench on it today and it didn't want to budge. I was thinking of machining a slot into my box end wrench but figured it's not made heavy enough for that and would just break. I guess the right answer is to just buy a new one, cut the wire off and remove it with a box end wrench... --Jerry Link to comment
Ken H. Posted April 21, 2006 Share Posted April 21, 2006 Anybody got any tips on removing these w/o cutting the wire? I put a 22mm open end wrench on it today and it didn't want to budge. I was thinking of machining a slot into my box end wrench but figured it's not made heavy enough for that and would just break. I guess the right answer is to just buy a new one, cut the wire off and remove it with a box end wrench... If your going to splice in an after market one, cut and splice gets you there. OTOH, with a BMW part it's worth tracing back to the wiring harness connector which is just under the tank, right side. ISFA removing it from the pipe, one really needs to have a O2 sensor socket to do it right. (It's a socket with a slot in the side for the wires to hang out.) Link to comment
No_Twilight Posted April 21, 2006 Author Share Posted April 21, 2006 If your going to splice in an after market one, cut and splice gets you there. OTOH, with a BMW part it's worth tracing back to the wiring harness connector which is just under the tank, right side. ISFA removing it from the pipe, one really needs to have a O2 sensor socket to do it right. (It's a socket with a slot in the side for the wires to hang out.) Ken, Thanks. I guess the aftermarket ones don't have the same connector. Seems like auto manufacturers would standardize this but then people would buy Cadillac O2 sensors from Saturn dealers and profits would shift. So it looks like I'll be splicing in an aftermarket one but that doesn't make it easy to just swap them from the other bike. I traced it back to the connector and the connector is too big to fit thru a box end wrench. Now that is some foreward thinking. I have an O2 sensor socket but because of the location of the sensor I'd have to take the exhaust system off to use it!!! Looks like cutting the wires is the plan. Thanks, Jerry Link to comment
DEF Posted April 21, 2006 Share Posted April 21, 2006 I would not recommend splicing wires on a Lambda sensor. The circuit is a high impedance circuit and disrupting the impedance will cause problems. Link to comment
RFW Posted April 21, 2006 Share Posted April 21, 2006 I would not recommend splicing wires on a Lambda sensor. The circuit is a high impedance circuit and disrupting the impedance will cause problems. Actually, there in no problem if the splice is done properly. After all, the connectors they use are generally just plain AMP "Faston" types (or similar), which are hardly the latest thing in high impedance type connectors. Obviously, just twisting the wires together is not acceptable, but a splice made using a standard crimp "butt" connector is a far better connection than any connector, anyhow. Bob. Link to comment
No_Twilight Posted April 21, 2006 Author Share Posted April 21, 2006 [... the connectors they use are generally just plain AMP "Faston" types (or similar), which are hardly the latest thing in high impedance type connectors. Obviously, just twisting the wires together is not acceptable, but a splice made using a standard crimp "butt" connector is a far better connection than any connector, anyhow. Bob. Bob, Thanks for reminding me I have a good selections of the crimp butt connectors. I would probably have used the ones that come with it. I like them because they are "Fast on" but that's pretty much where my admiration ends. They seem to work though. Thanks, Jerry Link to comment
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