2001 S8 Lambda Sensor info please?

[Goran]

Originally Posted by brasiliangringo

He did the pre cats on an S8 without removing the pipes ?

Yup, both from above, I watched him do it, they are accessible, and yes, the 'crows foot' wrench is a diesel/O2 deep socket that can be bought on ebay.
I suspect someone with long arms and with guidance from above could even access them from below without removing the downpipes. Is there enough room to swing a hammer though, to dislodge them?

This is what you need, maybe not this exact one, together with a long extension bar.

http://www.ebay.co.uk/itm/O2-Oxygen-...item51ccc3e7e7

[brasiliangringo]

Not that I recall and those crows foot vgood if they release with a bar. You wld need a direct one not offset for Impact wrench but obv ideal for the application your mech used.

[Goran]

The offset one gave more leverage for undoing the old lambdas at least I think this is the one he used, you cant use it for doing it back up to the correct torque unless you do some maths and adjust for the lever action of the crows foot.

Edit - although thinking about it, maybe a direct one with a longer wrench on the end of the extension is better.

[brasiliangringo]

Its for access they offset them, the leverage is compromised given the offset join - torque is lost (or not fully transferred to the target) given the 'play' in the connection at the offset joint.

[Cornershop]

Sourced the parts from eBay - user autokrake-autoteil offering them for circa £60 delivered.

Genuine Bosch items, sealed boxes with Bosch holograms etc. good deal I thought.

[brasiliangringo]

yep sounds alright to me, cheaper than buying from Audi !