O2 sensor extension SSI install

[Matt7127]

I just installed SSI's on my 82SC and the O2 sensor dosen't reach the SSI O2 port. What have other done? Can you splice, heat shrink an extension in place?

[porsche0nut]

I don't see why you couldn't add an extension.

Cut the 3 wires, strip them, solder your extension in with the same gauge wire, and then heat shrink them.

Post pics and let us know how it goes!


WAIT.... I thought the SC didn't have an O2 sensor??

[Matt7127]

My setup looks to be a single wire O2 sensor.

[suprxman]

When I replaced mine, the instructions had me match the wire length on the new sensor to the length of the original wire. That's on an 80 sc.

[sennasixty8]

I have heard that soldering damages the o2 sensor. Best to cut,strip crimp and heatshrink

[gtc]

How could soldering a wire a foot away from the sensor cause any damage?

I spliced mine and it works just fine.

[James Brown]

the single wire O2 sensor gets some O2 from the wire permeating through the wire it self. it is allowed to splice but not solder. at least that's what i was told many years ago

[dicklague]

a standard one wire o2 sensor carries 0 to 1 volt DC to whatever is reading it. You can crimp it, solder it, or just make a good solid connection.

No O2 is carried up the wire.

[VFR750]

Cut, splice longer wire, solder, heat shrink tubes, overwrap. Working for two years now.

[James Brown]

here is a blurb from Bosch installation manual for O2 sensor:

Installation instructions
The Lambda sensor should be installed at a point which permits the measurement of a representative exhaust-gas mixture, and which does not exceed the maximum permissible temperature. The sensor is screwed into a mating thread and tightened with 50...60 N · m.
– Install at a point where the gas is as hot as possible.
– Observe the maximum permissible temperatures.
– As far as possible install the sensor vertically, whereby the electrical connections should point upwards.
– The sensor is not to be fitted near to the exhaust outlet so that the influence of the outside air can be ruled out. The exhaust- gas passage opposite the sensor must be free of leaks in order to avoid the effects of leak-air.
– Protect the sensor against condensation water.
– The sensor body must be ventilated from the outside in order to avoid overheating.
– The sensor is not to be painted, nor is wax to be applied or any other forms of treatment. Only the recommended grease is to be used for lubricating the threads.
– The sensor receives the reference air through the connection cable. This means that the connector must be clean and dry. Contact spray, and anti-corrosion agents etc. are forbidden.
– The connection cable must not be soldered. It must only be crimped, clamped, or secured by screws.

[Matt7127]

What would you recommend for crimping. Can I just get some decent butt connectors splice in some wire and heat shrink?

[sennasixty8]

Originally Posted by Matt7127

What would you recommend for crimping. Can I just get some decent butt connectors splice in some wire and heat shrink?

Yes! I would visit your local graybar or quality electronics supply store for high quality butt connectors, however I'm sure plenty of others have gotten away with using 'normal everyday' butt connectors from radio shack, etc.