Probably not a good choice for an engine compartment. Not designed for the heat or any contamination. The inner insulation will quickly fail. 

Dennis

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of Neil N
Sent: Friday, September 19, 2014 4:27 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Re: Wire gauge for the shielded wire for the O2 signal?

Mobile CB coaxial wire?  Image:
http://upload.wikimedia.org/wikipedia/commons/thumb/7/73/RG-59.jpg/400px-RG-59.jpg

Does the shield on your current O2 wire connect to your ECU? If so, and if you replace the entire wire, connecting that shield to the ECU pin might pose a small challenge.

The O2 "signal" current must be incredibly small. Wire gauge of coaxial wire is small but should handle it.

My only thought is heat-vibration possibly affecting the coax wire.
The centre lead isn't stranded. Might fail soon at point it connects to O2 connector?

Route thoughtfully?

On 9/19/14, Don Hanson <dhanson928@gmail.com> wrote:

> .so I am wanting to replace the whole wire, all the way from the O2 
> sensor to the ECU..
>
> Second question:  Where might I source wire like that

--
Neil n

Blog: tubaneil.blogspot.ca

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http://tinyurl.com/d7gd5ej