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What do you think should be used....?


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Any ideas ?

On an exhaust that will have a lambda sensor removed for a while and a blanking plug inserted in its place, so that when some months later the plug needs to be removed and the lambda sensor shoved back in again the plug will come undone ?

Copperslip ?

Nothing ?

Or something else ?....in which case WHAT ! :lol: ?

nige

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Gallons of copperslip :)

Don't use nothing, when my last Discovery was built it had "nothing" on the downpipe to manifold studs and I had a hell of a job getting them out - dry as a bone :angry: refitted with lots of copperslip and when I took it off again to do the auto box conversion, it was much easier :)

I think you have to be careful not to get anything on the lambda sensor though... or it buggers them up.

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Copperslip ?

Copperslip works, but only to a degree. I find that I always expect more than it gives.

I would go for brass or (completely off-the-wall and never tried this so might be a pile'o'poo but...) how about ptfe tape and a shake-proof washer?

Rog

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why not shove an old Lambda sensor in the hole?

Are the latest Tesco fuel fiasco most garages will have a spare or two

I would agree and say that's the best suggestion yet just unplug them and protect the plug ;)

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why not shove an old Lambda sensor in the hole?

Are the latest Tesco fuel fiasco most garages will have a spare or two

That's probably the best idea.

I'm not sure about a copper / brass plug, though. The problem is that it'll expand faster / more than steel (remember the bi-metalic strip experiment at school?) and so a plug will become tighter when its warmed rather than looser (in the case of a nut). you're only chance of getting it off will be to do it when the engines cold and if it gets stuck don't bother trying to heat it. The only plus side is you won't get the plug and the exhaust corroding together and, if it does get stuck, it'll be easy to drill.

P.S. Tony, you have far too much time on your hands!

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Nige - the thing gets so hot it shouldn't corrode, the reason exhaust fixings do is they're exposed for years, the thread of the lambda is not exposed once it's wound into the hole, I've never had a problem getting one undone from anything in the scrapyard. Wind a dead one or an old spark plug in, use coppaslip if you want but I doubt you'll have hassle getting it out.

Is PTFE tape rated to 900°C? :huh:

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The correct solution is anti-seize paste which smeared on all(?) new lambda sensors from the packet. I understand this to be a paste medium carrying glass balls or bits in it.

"Apply anti-seize (ex. GM #5613695) to the threads before installing", quoted from MS site. I did briefly chase this at my local Vauxhall dealer parts department, was promised a phone call back but as usual, no result.

Have a chase yourself for it, somebody in this country must make something like that.

jw

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Gave up looking, there's loads of them, mainly copper based.

Did note two things;

Innovate say not to run their LC1 disconnected, so if yours is WB then be careful.

New oxygen sensors will be packaged with a special anti-seize lubricant already applied to the threads. If a sensor is removed from the exhaust and is to be reinstalled for any reason, the sensor threads must be coated with a fresh anti-seize compound. Use a G.M. anti-seize compound no. 5613695, no. 3613695 or an equivalent compound made of liquid graphite and glass beads. This is not a conventional anti-seize paste, the graphite will tend to burn away but the glass beads will remain. The use of a regular compound may electrically insulate the sensor, rendering it inoperative. You must coat the threads with an electrically conductive anti-seize compound.

Depends upon whether you have an earth connection to the device or if it relies on the thread into the exhaust.

jw

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