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Oil on O2 sensor

1K views 24 replies 9 participants last post by  swooshdave 
#1 ·
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I’m trying to replace my sensor and notice there’s a bit of oil on it.

Heating up the manifold as so far it’s not budging.

Wondering where the oil could be coming from.
 
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#9 ·
I Think So. he should double check this, as far as i know there are 3 main reasons,
1. The gasket is aging (broken/poor quality)
2. The screw is not tightened properly
3. the lid is oval (no flat surface, often encountered if the car was be keep drive for a long time)
 
#19 ·
Dave your thread makes no sense.

Oil on O2 sensor
That's the title, Oil on the o2 sensors? Ok so what?

Wondering where the oil could be coming from.
The valve cover, the only place that can replicate a leak like that short of a rod going to the moon, even then it's a stretch it would get over and up on the heat shield.
Were you needing suggestions on breaking free the seized, oil covered O2?

Is this a blog entry or a solicitation for help? - I'm asking because you're giving people flack for answering your original question
Thanks.
 
#20 ·
Dave your thread makes no sense.

Oil on O2 sensor
That's the title, Oil on the o2 sensors? Ok so what?



The valve cover, the only place that can replicate a leak like that short of a rod going to the moon, even then it's a stretch it would get over and up on the heat shield.
Were you needing suggestions on breaking free the seized, oil covered O2?

Is this a blog entry or a solicitation for help? - I'm asking because you're giving people flack for answering your original question
Thanks.
The flack is for answering without bothering to see if it had been answered.

And yes, the thread got intermixed with an O2 sensor replacement in the middle.
 
#25 ·
After two short drives (up to op temp) I think it’s doing better. After the first drive I think it was still burning off residual oil. First pic shows it a little wet.

But by the second pic it seems dry.

I’ll keep an eye on it. But I won’t get too excited until I can get a longer drive on it.

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