1996 Sentra oxygen sensor

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som - 24 Apr 2005 13:01 GMT

I need to change my oxygen sensor. However the sensor is attached to a nut
which fits into the engine. I cant get that nut off no matter how hard i
try. Can anyone tell me where i can get a replacement nut off the internet.
i looked in the local auto stores, and none had them.

Thanks

Som

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gary - 24 Apr 2005 14:09 GMT

The O2 sensors will not be on the engine. They are in
the exhaust manifold & pipes ( I know SR20DE motors
have more than 1 in '96, not sure about the 1.6 liters).
in the case of headers, there is an insert that is welded
into the manifold, and the sensor screws into that. I had
to rent a special socket to remove the last O2 sensor
I removed (due to the wires feeding to it).

Gary K

>I need to change my oxygen sensor. However the sensor is attached to a nut
>which fits into the engine. I cant get that nut off no matter how hard i
[quoted text clipped - 4 lines]
>
> Som

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JimV - 24 Apr 2005 15:06 GMT

> I need to change my oxygen sensor. However the sensor is attached to a nut
> which fits into the engine. I cant get that nut off no matter how hard i
[quoted text clipped - 4 lines]
>
> Som

Huh? The O2 sensors are in the exhaust stream, not the engine (unless
you mean exhaust manifold?) and there is no "nut" on them. They have
their own hex at the base. An "oxygen sensor socket" is usually the best
tool to remove them.

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Professor - 26 Apr 2005 13:28 GMT

Jim is right... actually I have used a propane torch to heat up the
base of the sensor to aid in removal. Those sensors get siezed in place
by the constant high-heat environment they must live in. The key is
patience (maybe some penetrating oil) and use a wrench that fits the
hex well, like a six point deep socket or equivalent is best.

Professor
www.telstar-electronics.com

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