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Old 18th August 2013, 12:58   #1
Avulon
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Exclamation Check Plenums ! **NEW MEMBERS TAKE NOTE**

As above, if you haven't checked the plenum since that last bout of heavy rain across the UK then do so, ASAP.

Despite having had a recent full service by my regular mech - who knows to check the plenum drains - only a month or so ago. I've just found 1/2 an inch of water in the bottom of the plenum. I only checked as every time I've put the A/C on recently I've been getting a slightly off smell for the first 20 to 30 seconds of cold air before it clears, I had wondered weather the pollen filter had gotten damp: it looks like it must have got wet at the bottom. Evidently those last heavy rains had managed to wash some debris down to block the drain and start filling the plenum. I'm glad I checked it now.

The following links to the 'Spyhole mod' how to (I really should get around to doing this).

http://www.the75andztclub.co.uk/foru...d.php?t=100130

Maybe another member who know a good link can link to an explanation/how-to for how to check/drain the plenum?
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PCV vortex 'filter'; bluetooth; inline thermostat; reversing sensors; plenum spyhole ; headlamp washers ; Diy mp3 player replacing CD multichanger; FBH with remote; Headlamp washers; black/chrome front grille, rear blind; Xenon projectors
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puddle lights; 2 Din cd/nav to fit; boot release button

Last edited by Avulon; 21st November 2013 at 20:58..
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Old 18th August 2013, 13:04   #2
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Just make this a job , as i do weekly, when checking levels...
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Old 18th August 2013, 13:48   #3
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A very good article on the Reason Why you check plenums is shown here and contains photo's of how to do it.
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Old 18th August 2013, 13:55   #4
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Done yesterday and checked pretty much weekly with the spy mode
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Old 18th August 2013, 14:15   #5
Avulon
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And that's why I should get around to doing the spyhole mod, as at the moment it's once a month at best (still only takes 15minutes though).

Thanks to the guys who've posted the right links.
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Need a T4 ?: T4 Owners Map thanks to Stevestrat ( use at your own risk)

Where?:
https://en.wikipedia.org/wiki/Tanelorn
Mods/Retrofits:

PCV vortex 'filter'; bluetooth; inline thermostat; reversing sensors; plenum spyhole ; headlamp washers ; Diy mp3 player replacing CD multichanger; FBH with remote; Headlamp washers; black/chrome front grille, rear blind; Xenon projectors
To do:
puddle lights; 2 Din cd/nav to fit; boot release button
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Old 18th August 2013, 14:47   #6
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Just checked mine....

As dry as a camels ****

Although Ive just ordered a pollen filter as the one in there is a bit pongy lol
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Old 24th November 2019, 19:54   #7
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No photos in the link from this one.
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Old 25th November 2019, 14:10   #8
Avulon
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Also it is probably well worth noting that even on cars with both plenum drains, that if the nearside drain is blocked then at least the cabin filter will get wet and most likely the bottom of the ECU. The drivers side drain is higher up!
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Need a T4 ?: T4 Owners Map thanks to Stevestrat ( use at your own risk)

Where?:
https://en.wikipedia.org/wiki/Tanelorn
Mods/Retrofits:

PCV vortex 'filter'; bluetooth; inline thermostat; reversing sensors; plenum spyhole ; headlamp washers ; Diy mp3 player replacing CD multichanger; FBH with remote; Headlamp washers; black/chrome front grille, rear blind; Xenon projectors
To do:
puddle lights; 2 Din cd/nav to fit; boot release button
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Old 26th November 2019, 19:11   #9
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Quote:
Originally Posted by oswestryalex View Post
No photos in the link from this one.
Bit more info please.---
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Old 3rd October 2021, 12:51   #10
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I did the spy hole mod some time ago, and checked the compartment drain today, all ok. One question though, my ZT only seems to have a top (wing) drain fitted on the n/s, on the off-side it has a blanking plug. Is this correct?

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