Plenum Check - The Reason Why **ALL OWNERS PLEASE NOTE** - Page 31

HarryM1BYT · 17th July 2017, 18:49

Quote:

Originally Posted by alanaslan

Another interesting point quality stainless steel does not conduct electricity either.

Well that, I had to research, because it goes against all that I knew - all metals are conductive.

All that I was able to find was that the chromium oxide, like very many metal oxides can be none conductive, or a semi-conductor. The chromium oxide appears on the surface of stainless steel and can make the surface none conductive, the underlying stainless steel remains conductive. As confirmed sometimes, by being unable to get a decent connection to the metal surface with a test meter. Stainless steel, depending on the type, has a conductivity between 3% and 15% of that of copper - so not a good conductor, but certainly a conductor.

Arctic · 18th July 2017, 00:27

Quote:

Originally Posted by T-Cut

Later models have full bore drains without the flattened/fanned ends.

TC

The photo's in my post above were of my Tourer late 04 plate so some do have the flat/fanned ends

alanaslan · 13th August 2017, 20:50

Quote:

Originally Posted by HarryM1BYT

Well that, I had to research, because it goes against all that I knew - all metals are conductive.

All that I was able to find was that the chromium oxide, like very many metal oxides can be none conductive, or a semi-conductor. The chromium oxide appears on the surface of stainless steel and can make the surface none conductive, the underlying stainless steel remains conductive. As confirmed sometimes, by being unable to get a decent connection to the metal surface with a test meter. Stainless steel, depending on the type, has a conductivity between 3% and 15% of that of copper - so not a good conductor, but certainly a conductor.

The conductivity of quality stainless steel is lower than 0.000001% which is as good as rubber or plastic. As quality stainless steel has no carbon in it only silicon. Brings us back to the free electrons again. If there are no free electrons in the material then it can't conduct a current as it is the free electrons that allow the magic electricity to be conducted through it. I Remember reading an article half a century ago that when electricity was first discovered they thought it to be like water and would only flow down hill, until someone dropped the high end of the cable and it still worked.
I am going to invent a square wheel next year so when you stop the car will not run away from you it will just stay where you put it.
Only kidding!

suzublu · 13th August 2017, 21:12

Quote:

Originally Posted by alanaslan

The conductivity of quality stainless steel is lower than 0.000001% which is as good as rubber or plastic. As quality stainless steel has no carbon in it only silicon. Brings us back to the free electrons again. If there are no free electrons in the material then it can't conduct a current as it is the free electrons that allow the magic electricity to be conducted through it. I Remember reading an article half a century ago that when electricity was first discovered they thought it to be like water and would only flow down hill, until someone dropped the high end of the cable and it still worked.
I am going to invent a square wheel next year so when you stop the car will not run away from you it will just stay where you put it.
Only kidding!

Carry On Cleo

sent

Arctic · 14th August 2017, 09:38

I note that Aldi /Lidi have the rolls of gutter leaf stopper in again as it is coming towards September, I think you can also buy the from the pound shop, here is the link below worth doing before the onset of the autumn leaf dropping etc

https://www.the75andztclub.co.uk/for...6&postcount=19

Alikris · 15th August 2017, 16:34

That would be useless for me, given the four pine trees a stonesthrow from my drive which drop their needles every autumn. I use open cell filter foam, which does the trick and keeps the pine needles out.

Ali.

Arctic · 21st August 2017, 00:41

Quote:

Originally Posted by Alikris

That would be useless for me, given the four pine trees a stonesthrow from my drive which drop their needles every autumn. I use open cell filter foam, which does the trick and keeps the pine needles out.

Ali.

Hi Ali.
I can see where you are coming from with the fact that those pine needles get into very place possible, to add another note this time of year anyone with a sunroof which have not done the sunroof drain mod can also be vigilant if take the risk at your own peril.

Jules · 21st August 2017, 08:03

Couldn't agree more.
Pine needles are all around here which is what gave me the idea of introducing my plenum guard.

In extreme cases more precautions need to be taken to stop the small debris going in the plenum area.

Cover the underside of the plastic plenum hatches with either fine netting or open cell sponge.

Arctic · 16th September 2017, 07:19

Sadly it as to be said the summer is over, and the wet seasons are now upon us, so lets not for get to check those plenums each weekend when you do your weekly oil and fluids checks I hope

cheers Arctic

HarryBowie · 17th September 2017, 15:28

Hiya. Can anyone tell me how long it takes roughly for your plenum drain to collect standing water 2 inches up the pollen filter and the drain hole full of leaves that won't shift?
I had my local garage clean it out approximately six weeks ago because those leaves just would not budge... I also had to physically show them where the drain was…
I'm finding the same today.
I have managed to drain the water but not the leaves. Can the drain really get clogged up that badly in six weeks? Laura

Sent from my iPhone using Tapatalk

14th August 2017, 09:38	#305
Arctic Give to Learn Freelander 2 Join Date: Aug 2010 Location: West Midlands Posts: 18,709 Thanks: 1,155 Thanked 6,407 Times in 3,874 Posts	Leaf stopper I note that Aldi /Lidi have the rolls of gutter leaf stopper in again as it is coming towards September, I think you can also buy the from the pound shop, here is the link below worth doing before the onset of the autumn leaf dropping etc https://www.the75andztclub.co.uk/for...6&postcount=19 __________________ Arctic Givology Learn to Give Everything is Achievable ad altiora tendo. Check out our Nano meet dates http://www.midlandsnanomeets.co.uk/ http://www.the75andztclub.co.uk/index.php?thepage=howto " You do the work , we supply the expertise "

15th August 2017, 16:34	#306
Alikris Gets stuck in Rover 75 1.8 Connie SE Join Date: Dec 2015 Location: Vindolanda, Northumberland Posts: 539 Thanks: 111 Thanked 153 Times in 105 Posts	That would be useless for me, given the four pine trees a stonesthrow from my drive which drop their needles every autumn. I use open cell filter foam, which does the trick and keeps the pine needles out. Ali. __________________ Vicky: born Thursday, 15th April 2004 @ 08:20:55. The 95,246th 75 to be produced, and the 4,783rd 75 in British Racing Green Pearlescent.

21st August 2017, 08:03	#308
Jules This is my second home ZT 260 SE Twilight and 10 other 75 ZT's :O Join Date: Jan 2007 Location: Conwy NORTH WALES Posts: 11,094 Thanks: 512 Thanked 1,116 Times in 763 Posts	Couldn't agree more. Pine needles are all around here which is what gave me the idea of introducing my plenum guard. In extreme cases more precautions need to be taken to stop the small debris going in the plenum area. Cover the underside of the plastic plenum hatches with either fine netting or open cell sponge. __________________ [SIGPIC][/SIGPIC] Newbies do now!! 1. Plenum drains..all 3 or 4 year dependent 2. Cooling fan..All speeds functioning 3. Bonnet cable divider block

16th September 2017, 07:19	#309
Arctic Give to Learn Freelander 2 Join Date: Aug 2010 Location: West Midlands Posts: 18,709 Thanks: 1,155 Thanked 6,407 Times in 3,874 Posts	Sadly it as to be said the summer is over, and the wet seasons are now upon us, so lets not for get to check those plenums each weekend when you do your weekly oil and fluids checks I hope cheers Arctic __________________ Arctic Givology Learn to Give Everything is Achievable ad altiora tendo. Check out our Nano meet dates http://www.midlandsnanomeets.co.uk/ http://www.the75andztclub.co.uk/index.php?thepage=howto " You do the work , we supply the expertise "

17th September 2017, 15:28	#310
HarryBowie Regular poster Rover 75 Join Date: Apr 2017 Location: Hull Posts: 35 Thanks: 22 Thanked 5 Times in 4 Posts	Hiya. Can anyone tell me how long it takes roughly for your plenum drain to collect standing water 2 inches up the pollen filter and the drain hole full of leaves that won't shift? I had my local garage clean it out approximately six weeks ago because those leaves just would not budge... I also had to physically show them where the drain was… I'm finding the same today. I have managed to drain the water but not the leaves. Can the drain really get clogged up that badly in six weeks? Laura Sent from my iPhone using Tapatalk