Thread: Aem 30-300
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kuehl kuehl is offline
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Join Date: Aug 2004
Location: Stuck in NJ
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Originally Posted by Quicksilver View Post
ALWAYS CRIMP but there is a different reason.
The O2 sensor actually pulls in atmospheric air through the multi-strand core of the wire!
Hmmm. That's interesting.
I have a Bosch 4.9 LSU in my hand. Its a 5 wire. I'm trying to figure out how air is pulled in through any of the PTFE coated stranded wires.

I was reading Bosch's Tech spec Y 258 K01 020-000e and they refer to the following in terms of air reference:
The PTFE formed hose is part of the reference air volume of the sensor and
must be kept sealed and undamaged. For installation, the minimum bending
radius of the hose must be 20mm (for long PTFE hose) resp. 12mm (for short
hose). Keep the PTFE formed hose away from sharp edges and avoid contact/
friction with frame/engine assembly.
The first fixing point for the cable to the car body should be 200mm to
400mm after the end of the PTFE formed hose, depending on movement of the
exhaust system.
1987 911 cab, modified
Old 06-06-2018, 10:16 AM
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