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CAT removal

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Old Jun 19th, 2021, 20:51   #21
Stephen Edwin
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EDIT: quote didn't quite work.



Thank you Clan.

I will unplug promptly.

And when the time comes to fit a new sensor I will look for the clips.

Stephen

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Old Jun 23rd, 2021, 17:49   #22
Stephen Edwin
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Hello

I am still applying PlusGas.

Is the blanking plug perhaps needing an AF or BS/WHIT spanner or socket please?

Stephen

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Old Jun 23rd, 2021, 18:32   #23
heckflosse
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Lambda sensor connectors are on the bulkhead under the bonnet behind the Offside strut tower.
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Old Jun 23rd, 2021, 18:52   #24
Stephen Edwin
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Thanks. Mine appear to bu in-line connectors in that place. Unless there are similar connectors in that area.

The hex of the blanking plug I can't get a fit for yet. I must be very tired 'cos I can't get a confident measure of the size yet.

Stephen

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Old Jun 24th, 2021, 00:34   #25
Clan
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Quote:
Originally Posted by Stephen Edwin View Post
Thanks. Mine appear to bu in-line connectors in that place. Unless there are similar connectors in that area.

The hex of the blanking plug I can't get a fit for yet. I must be very tired 'cos I can't get a confident measure of the size yet.

Stephen

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it must be very rusty now , its originally metric but use which ever socket is a tight fit even if you need to tap it on with a hammer.
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Old Jun 24th, 2021, 12:27   #26
Clifford Pope
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If the worst comes to the worst I've always found the easiest way of unscrewing a rusty sensor is to remove the cat and whatever length of exhaust pipe is necessary, clamp the sensor in a hefty vice, and then use the cat/pipe as a lever to unwind the cat from the sensor.

The trouble with trying to apply leverage to the sensor in situ is that the cat is not rock solid - the engine and exhaust hangers move and absorb all your efforts.
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Old Jun 24th, 2021, 22:06   #27
Stephen Edwin
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Thank you Heckflosse, Clan and Clifford

Quote:
Originally Posted by Clan View Post
it must be very rusty now , its originally metric but use which ever socket is a tight fit even if you need to tap it on with a hammer.

Oh yes corroded. More than I had realised. It has been decided as 17mm. I should have worked that out earlier. Age and health.

I am continuing with PlusGas. Daily. And my 17mm impact socket is wall drive. My first experience of using a hex impact socket was dismantling an 1100 sub-frame, a seriously rusted bolt head. Impact socket, an extension, a "breaker" bar. Job done. So I do hope PlusGas and wall drive will do this job. I especially learnt the value of daily PlusGas doing 240 headlight removal, for reflector replacement. Perhaps Dave's magic mixture would help. But it is not the easiest fixing to apply a mixture to. And for me so far PlusGas is tried and tested. For me that is important.

I am being patient with the PlusGas. When I eventually try to undo the blanking plug, I have a good impact driver available. Many micro impacts are a good way to deal with tough fixing undoing.

If none of that works, whether to resort to a worn, corroded, &c remover extractor could become a cost decision. Having a new boss welded in by the mechanic could be cheaper than a set of extractors.

All will be well, I hope.

Quote:
Originally Posted by Clifford Pope View Post
If the worst comes to the worst I've always found the easiest way of unscrewing a rusty sensor is to remove the cat and whatever length of exhaust pipe is necessary, clamp the sensor in a hefty vice, and then use the cat/pipe as a lever to unwind the cat from the sensor.

The trouble with trying to apply leverage to the sensor in situ is that the cat is not rock solid - the engine and exhaust hangers move and absorb all your efforts.
Good advice thanks. I'm following up on your good advice re the blanking plug on the down pipe. The cat has been stolen.

The down pipe is fairly firm, and the impact driver has more hope than leverage, I think. Many strong swift impacts.

*****

Early in this mini saga. I had a horrible chest pain. I am known to have cardiac "issues". It was probably angina. But. I am further below my best than before. Just to put the job in my personal perspective. And I acknowledge that some other members must have more difficult health than me.

Obviously I am all the more grateful for advice. Thank you.


Stephen

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Last edited by Stephen Edwin; Jun 24th, 2021 at 22:14.
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