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Old 11-23-2004, 01:47 AM   #1
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Default o2 sensors

well its been about time for me to change my o2 sensor for about a few years now hahaha. i'm wondering where i can exactly locate it on my 91 le and if there are multiple ones. on and if anyone would be kind enought to point me in a direction of what kind of o2 sensor i would need ( i now ac delco is the best so i plan on using that brand)

thanks a lot
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Old 11-23-2004, 01:50 AM   #2
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You've only got one. Stand at the front of the car, Lean waaaay over it and look directly down behind the engine. That'* it right there.
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Old 11-23-2004, 02:11 AM   #3
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Anything but bosch....I've had my bosch in for 4 months now though and it'* still working......lol don't ask me how or why. .....but it is.
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Old 11-23-2004, 07:32 AM   #4
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Also, to help a little in finding it. The EGR valve has a large tube going to the rear header. Follow that down. Now, keep following the header, until to find this smaller thing, with one little purple wire going to it. That'* the o2 sensor.


-justin
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Old 11-23-2004, 11:09 AM   #5
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Quote:
Originally Posted by LakevilleSSEi
Anything but bosch....I've had my bosch in for 4 months now though and it'* still working......lol don't ask me how or why. .....but it is.
gets no easier then that
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Old 11-24-2004, 12:54 AM   #6
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sweet you guys rock
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Old 11-24-2004, 09:19 AM   #7
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Have had a Boshe sensor in one car for about a year now - seems OK though MPG may have dropped slightly. Biggest issue is that it is enough longer than a Delco that it barely fits in my socket and must be removed to get the #6 spark plug out.
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Old 11-24-2004, 07:31 PM   #8
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Make sure you have (access to) a torch and/or threading tools just in case, if you're doing it DIY.
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Old 11-25-2004, 12:16 PM   #9
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Have heard of one (1) O2 sensor being far too difficult to remove, have never had any difficulty (more than two grunts) on any I have replaced.

Always use anti-seize and tighten like a spark plug but that is all. I do use a slotted O2 socket with about a foot of extensions but nothing special.

Now if someone in the past played godzilla with it, no doubt it would be difficult but I have been fortunate so far. Of course I also have lived in the south for thutty yar so have missed many experiences like rotted cradles and brake lines.
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Old 12-10-2004, 11:59 AM   #10
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You could always soak it overnight in penetant like I did. Warm the car a few min. to heat the manifold then put a cold socket on it if its stuck.
My Bosch 02 on my 96 has worked well so far for about a year.
Maybe Bosch has improved them.
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