LLT Sv6 Pre Cat o2 sensor Removal

[Grapejuice47]

I might swap o2 sensors around to see if values change or anything

 

[lmoengnr]

How many kilometres has the car done?

 

[greenacc]

Is your sensor socket 1/2" drive or 3/8?
I have had similar issues trying to get one of my O2 sensors out. I think the socket starts to open up when it's under pressure. So I might try a strong hose clamp around it next time!

 

[vr304]

I might swap o2 sensors around to see if values change or anything

You’d be better just to replace them with new ones and be done with mate, go for Bosch or Ntk

 

[Grapejuice47]

How many kilometres has the car done?

It’s only got 160kms
As for the socket size I’m not too sure I returned it back coz it seemed pretty weak so might use one from mates workshop
That clamping idea might just work lol idk why I didn’t think of that

 

[Grapejuice47]

You’d be better just to replace them with new ones and be done with mate, go for Bosch or Ntk

You’re right however we still don’t know what the real issue is
I’m just swapping the sensors as one banks fuel trims is 18+ while other is 27+ so if they change around or something then we have found the problem

 

[Fu Manchu]

I read in the manual that these are designed to be undone at temps above 48ºC. They were quite specific about the temp :lol:
They are ridiculously difficult to undo when cold.
Don't forget to unplug the sensor when undoing them and best to disconnect the battery first.

 

[syked]

You’re right however we still don’t know what the real issue is
I’m just swapping the sensors as one banks fuel trims is 18+ while other is 27+ so if they change around or something then we have found the problem

Either way you have a problem on both banks so swapping them for each other doesn't prove anything .

Whilst checking for vacuum leaks did you check for unmetered air before the inlet manifold like the breather hose, air filter box and the big inlet hose?

Have you checked the exhaust and catalytic converter for physical damage causing restrictions?

Have you done any work recently with the inlet manifold that required you to remove it and if so did you use a new gasket when you put it back together?

 

[Grapejuice47]

Either way you have a problem on both banks so swapping them for each other doesn't prove anything .

Whilst checking for vacuum leaks did you check for unmetered air before the inlet manifold like the breather hose, air filter box and the big inlet hose?

Have you checked the exhaust and catalytic converter for physical damage causing restrictions?

Have you done any work recently with the inlet manifold that required you to remove it and if so did you use a new gasket when you put it back together?

Exhaust is in perfect shape
As for vacuum leaks I’ve checked every connection after the maf sensor

It could possibly be the inlet manifold gasket however I never knew that needed to be replaced every time it’s opened as it’s a solid plastic part, besides I always used to remove it to work on things and it would work perfectly fine after wards
But I’ll give it a go anyways

 

[greenacc]

Sometimes you get lucky with the old gasket and sometimes you don't. If you have reused it several times then definitely time to try a new one. It's easy to dislodge it when placing the manifold on top too. It happened to me once.