Honda Car Forum

I've read a mechanic book. It says on Oxygen Sensor page that
do not solder Oxygen sensor wire because it might cause
misleading the voltage. I'm kind of doubt if soldered wire
would make different voltage reading from unsoldered wire.
How can a soldered wire and unsoldered wire make different
voltage reading? Does anyone ever heard of this or know this is true or
false?

<mmdir2005@yahoo.com> wrote in message
news:1141377961.625238.241100@i40g2000cwc.googlegr oups.com...
>
> I've read a mechanic book. It says on Oxygen Sensor page that
> do not solder Oxygen sensor wire because it might cause
> misleading the voltage. I'm kind of doubt if soldered wire
> would make different voltage reading from unsoldered wire.
> How can a soldered wire and unsoldered wire make different
> voltage reading? Does anyone ever heard of this or know this is true or
> false?
>
Yes, this is called the galvanic effect and is the basis of how
thermocouples are made. Dissimilar metals have a contact potential that
varies with temperature. If the solder is between the two wires, any small
temperature difference will create a voltage across the joint, hence giving
a bad reading. You got good advice.

Dave

mmdir2005@yahoo.com wrote:
>
> I've read a mechanic book. It says on Oxygen Sensor page that
> do not solder Oxygen sensor wire because it might cause
> misleading the voltage. I'm kind of doubt if soldered wire
> would make different voltage reading from unsoldered wire.
> How can a soldered wire and unsoldered wire make different
> voltage reading? Does anyone ever heard of this or know this is true or
> false?


--------------------------

If you're talking about cutting off the connector half-way from the
sensor, resoldering and heat-shrinking the joints, why not? No salt can
penetrate, like it would on a 'crimp' style.

'Curly'

"'Curly Q. Links'" <motsco__@interbaun.com> wrote in
news:44089B3D.3EDD5736@interbaun.com:

> mmdir2005@yahoo.com wrote:
>>
>> I've read a mechanic book. It says on Oxygen Sensor page that
>> do not solder Oxygen sensor wire because it might cause
>> misleading the voltage. I'm kind of doubt if soldered wire
>> would make different voltage reading from unsoldered wire.
>> How can a soldered wire and unsoldered wire make different
>> voltage reading? Does anyone ever heard of this or know this is true or
>> false?
>
>
> --------------------------
>
> If you're talking about cutting off the connector half-way from the
> sensor, resoldering and heat-shrinking the joints, why not? No salt can
> penetrate, like it would on a 'crimp' style.
>



My mechanic says soldering is the *only* way to go, combined with a good
heat-shrink tubing seal.

In fact, he says a crimp connection is far more likely to affect voltage
over time than a soldered connection, because a crimped connection will
attract far more moisture -- and be affected far more by vibration -- than
a soldered connection.


--
TeGGeR®

The Unofficial Honda/Acura FAQ
www.tegger.com/hondafaq/

Makes sense. Is there not a special kind of solder for situations like this?
There are many different types.

TeGGeR® wrote:
>>> I've read a mechanic book. It says on Oxygen Sensor page that
>>> do not solder Oxygen sensor wire because it might cause
>[quoted text clipped - 9 lines]
>> sensor, resoldering and heat-shrinking the joints, why not? No salt can
>> penetrate, like it would on a 'crimp' style.
>
>My mechanic says soldering is the *only* way to go, combined with a good
>heat-shrink tubing seal.
>
>In fact, he says a crimp connection is far more likely to affect voltage
>over time than a soldered connection, because a crimped connection will
>attract far more moisture -- and be affected far more by vibration -- than
>a soldered connection.
>

--
Message posted via CarKB.com
http://www.carkb.com/Uwe/Forums.aspx...-cars/200603/1

Just make sure that you have very good copper-to-copper contact, and
then solder. You won't have a dissimilar metal in the way at that
point, but the solder will chemically and mechanically protect the
joint. This is the essence of good soldering technique. The book is
"right," in that some people (mechanics) just are not electronic techs,
and don't really appreciate the correct way to solder a joint.

In article <1141377961.625238.241100@i40g2000cwc.googlegroups .com>,
mmdir2005@yahoo.com wrote:

> I've read a mechanic book. It says on Oxygen Sensor page that
> do not solder Oxygen sensor wire because it might cause
> misleading the voltage. I'm kind of doubt if soldered wire
> would make different voltage reading from unsoldered wire.
> How can a soldered wire and unsoldered wire make different
> voltage reading? Does anyone ever heard of this or know this is true or
> false?

I checked some online replacement guides. One sensor has stainless
steel wires so it is not compatible with standard electronics solder.
Others recommend soldering.

Stainless steel soldering requires a very powerful flux like phosphoric
acid.

On 2006-03-04, Kevin McMurtrie <mcmurtri@dslextreme.com> wrote:

> steel wires so it is not compatible with standard electronics solder.
> Others recommend soldering.

> Stainless steel soldering requires a very powerful flux like phosphoric
> acid.

Use silver solder and flux. Requires high heat. A BernzOmatic MAPP
gas torch will do the trick.

nb

notbob wrote:
> On 2006-03-04, Kevin McMurtrie <mcmurtri@dslextreme.com> wrote:
>
>
>>steel wires so it is not compatible with standard electronics solder.
>>Others recommend soldering.
>
>
>>Stainless steel soldering requires a very powerful flux like phosphoric
>>acid.
>
>
> Use silver solder and flux. Requires high heat. A BernzOmatic MAPP
> gas torch will do the trick.
>
> nb
>
how long do you want this to last? that kind of flux corrodes and eats
the joint, even if you /think/ it's clean. it's /not/ used in
electrical work.

jmattis@attglobal.net wrote:
> Just make sure that you have very good copper-to-copper contact, and
> then solder. You won't have a dissimilar metal in the way at that
> point, but the solder will chemically and mechanically protect the
> joint. This is the essence of good soldering technique. The book is
> "right," in that some people (mechanics) just are not electronic techs,
> and don't really appreciate the correct way to solder a joint.
>
but if you read the book further, you'll learn that solder is /NOT/ used
where high thermal cycling is involved, or where vibration is involved.
ask anyone in the aerospace industry - it's all crimp joints in these
applications to ensure reliability. look at your oem honda connections
for that matter.