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YOGIVW
Samba Member
Joined: February 04, 2005
Posts: 263
Location: Olsztyn/POLAND
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 Posted: Sat Aug 21, 2010 3:51 am Post subject: A1 and O2 sensor position |
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I'm going to weld in bung to my A1 side winder for O2 sensor. What is the correct position? Horizontally, vertically or does not matter?
Any pictures. Searched the gallery but there is nothing.
thanks
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Pawel
Vw 1303 1979 Black&Beige convertible
VW T4 2001 Caravelle Business 2.8 V6
Westfalia James Cook 2.9TD |
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hoghead
Samba Member
Joined: May 28, 2006
Posts: 548
Location: Chiangmai
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| Posted: Sat Aug 21, 2010 4:18 am Post subject: |
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| Mine is ceramic coated so I am planning on welding it into the pipe leading to the muffler, on the other side of the flange |
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vince1
Samba Member
Joined: December 14, 2003
Posts: 823
Location: Burgundy, France
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YOGIVW
Samba Member
Joined: February 04, 2005
Posts: 263
Location: Olsztyn/POLAND
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| Posted: Sat Aug 21, 2010 6:24 am Post subject: |
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Vince, thanks for the picture but mine header is also ceramis coated so I rather think to weld it to the second part of the exaust
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Pawel
Vw 1303 1979 Black&Beige convertible
VW T4 2001 Caravelle Business 2.8 V6
Westfalia James Cook 2.9TD |
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1955ccbug
Samba Member
Joined: October 03, 2004
Posts: 730
Location: Olympia wa
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| Posted: Sat Aug 21, 2010 7:18 am Post subject: |
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| I don't think it matters......just don't put it on the bottom where moisture can collect in it. Mine goes out the side of the muffler pipe just after the flange, lots of newer cars have them on the top...... |
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tencentlife
Samba Member
Joined: May 02, 2006
Posts: 10078
Location: Abiquiu, NM, USA
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| Posted: Sat Aug 21, 2010 12:36 pm Post subject: |
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The sensor cell requires a high temp to produce a consistent signal, and even with heated narrowband sensors and widebands it is still helped greatly by being heated by the exhaust gas itself, so you want it positioned upstream where the gases are still hot, but if it's a single sensor it also has to be after the last merge, so it is sampling a mix of all the cylinders' outputs. The bung should always be welded to the upper half of the pipe's circumference, to prevent water condensate being able to pool in the sensor tip, which will kill it.
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YOGIVW
Samba Member
Joined: February 04, 2005
Posts: 263
Location: Olsztyn/POLAND
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| Posted: Wed Aug 25, 2010 2:21 pm Post subject: |
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I going to weld it as on the picture. for me it will be easy to route the wiring
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Pawel
Vw 1303 1979 Black&Beige convertible
VW T4 2001 Caravelle Business 2.8 V6
Westfalia James Cook 2.9TD |
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