Go Back   The 75 and ZT Owners Club Forums > The 75 and ZT Owners Club Forums > Technical Help Forum
Register FAQ Image Gallery Members List Calendar Search Today's Posts Mark Forums Read
Notices

Reply
 
Thread Tools Display Modes
Old 5th September 2019, 15:42   #161
COLVERT
Foreign correspondent.
 
COLVERT's Avatar
 
R75 Saloon.

Join Date: Feb 2009
Location: France/or Devon.
Posts: 10,966
Thanks: 2,726
Thanked 1,275 Times in 1,105 Posts
Default

Quote:
Originally Posted by Jules View Post
You are confusing upper drains with lower drains.

ALL 75's have 2 lower drains.
From mid 2003ish the driver's side upper drain was replaced with a grommet.

The upper drains are not related to problems with ECU !
From your post then some of the earlier cars did have two drain tubes. Has anyone ever posted on here that BOTH tubes had got blocked ??

It could be that that many of the damaged ECU's could have escaped water damage with two drains rather than one.- __________________
Don't think so. Jules, read post 156 above.---

PS. Sorry got the post number wrong.--Now corrected.
__________________

Last edited by COLVERT; 5th September 2019 at 21:44..
COLVERT is offline   Reply With Quote
Old 5th September 2019, 18:31   #162
Jules
This is my second home
 
Jules's Avatar
 
ZT 260 SE Twilight and 10 other 75 ZT's :O

Join Date: Jan 2007
Location: Conwy NORTH WALES Tel 07831 457011
Posts: 11,458
Thanks: 514
Thanked 1,074 Times in 741 Posts
Default

You've lost me there
__________________


Newbies do now!!
1. Plenum drains..all 3 or 4 year dependent
2. Cooling fan..All speeds functioning
3. Bonnet cable divider block
Jules is offline   Reply With Quote
Old 28th October 2019, 00:28   #163
robeire
robeire
 
robeire's Avatar
 
Rover 75

Join Date: Sep 2019
Location: co.meath
Posts: 132
Thanks: 42
Thanked 51 Times in 31 Posts
Default

Quote:
Originally Posted by Avulon View Post
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).

https://www.the75andztclub.co.uk/for...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?
when changing the cabin filter gently lift back the ecu and clear the the plenum. this is the lat chance saloon ....
mine was blocked ,so in effect plenum 1 gets blocked this is your last resort , i cleaned it out with a clothes hanger and a small tip power washer .
hope this helps .

rob
__________________
pink floyd playing wile driving a rover
The Raven .
robeire is offline   Reply With Quote
Old 28th October 2019, 15:34   #164
Jules
This is my second home
 
Jules's Avatar
 
ZT 260 SE Twilight and 10 other 75 ZT's :O

Join Date: Jan 2007
Location: Conwy NORTH WALES Tel 07831 457011
Posts: 11,458
Thanks: 514
Thanked 1,074 Times in 741 Posts
Default

Let me re reiterate for everyone.

Every variant from 99-2005 have 2 lower drains.
One in front of pollen filter and one below the brake servo.

BOTH must have the flat end cut off. (best done from underneath.

The visible drains near the bonnet hinges (2 on early cars only one on later cars as drivers side was blocked off) are nothing to do with the plenum area but still need to be kept clear.


The Spyhole mod is only half the job !!
You have to get underneath and clear the drain below the servo for when the car is parked on a slope leaning towards the driver's side!!!
__________________


Newbies do now!!
1. Plenum drains..all 3 or 4 year dependent
2. Cooling fan..All speeds functioning
3. Bonnet cable divider block
Jules is offline   Reply With Quote
Old 17th November 2019, 16:43   #165
JohnnyBG
Regular poster
 
Rover 75 Tourer

Join Date: Sep 2019
Location: Teesside
Posts: 77
Thanks: 41
Thanked 17 Times in 14 Posts
Default

Checked plenum passenger side. Water clearly drains out as none present despite the horrid weather over last few days. But couldn't get enough light in to see where to rod through!


I'll have to have another go when it's dry again.


The pin things of the passenger side had all popped out only one was present but I had bought some ready for the job. The trim immediately below the windscreen broken where the perforated guard clips in and what's more at the other end where the bolt is too. The PO was very fond of cable ties!


I'll get some replacements.


JohnnyBG

Last edited by JohnnyBG; 17th November 2019 at 16:44.. Reason: missing info.
JohnnyBG is offline   Reply With Quote
Old 19th November 2019, 18:07   #166
COLVERT
Foreign correspondent.
 
COLVERT's Avatar
 
R75 Saloon.

Join Date: Feb 2009
Location: France/or Devon.
Posts: 10,966
Thanks: 2,726
Thanked 1,275 Times in 1,105 Posts
Default

I now have done the spy hole mod.

I must live in a leaf less zone as I've only cleaned the plenum out once in 13 years.

Pic below shows the last visual check quite some while ago.

Ran the rod through earlier this year when I drilled the hole.


Attached Images
File Type: jpg Plenum chamber..jpg (132.1 KB, 15 views)
File Type: jpg Plenum chamber 2.jpg (133.5 KB, 16 views)
__________________
COLVERT is offline   Reply With Quote
Old 19th November 2019, 19:06   #167
Arctic
Give to Learn
 
Arctic's Avatar
 
Rover 75 Tourer

Join Date: Aug 2010
Location: West Midlands
Posts: 14,308
Thanks: 759
Thanked 4,288 Times in 2,602 Posts
Default

Quote:
Quote:
Originally Posted by COLVERT View Post
I now have done the spy hole mod.

I must live in a leaf less zone as I've only cleaned the plenum out once in 13 years.

Pic below shows the last visual check quite some while ago.

Ran the rod through earlier this year when I drilled the hole.


Hi Jon
you can see from your photo's that the plenum tube is filled up with debris so the rodding would have cleared it, hopefully you managed to crawl under the car and cut off the first 15mm of the tubes so this kind of debris can be washed out of the tube.

Also I would most certainly changed that horrid pollen filter it looks like its been there for an age.
__________________
Arctic
Givology Learn to Give
Everything is Achievable

ad altiora tendo.

Check out the 2020 meet dates
http://www.midlandsnanomeets.co.uk/meets_2014.html

http://www.the75andztclub.co.uk/index.php?thepage=howto

" You do the work , we supply the expertise "
Arctic is offline   Reply With Quote
Old 21st November 2019, 18:11   #168
COLVERT
Foreign correspondent.
 
COLVERT's Avatar
 
R75 Saloon.

Join Date: Feb 2009
Location: France/or Devon.
Posts: 10,966
Thanks: 2,726
Thanked 1,275 Times in 1,105 Posts
Default

Quote:
Originally Posted by Arctic View Post
Hi Jon
you can see from your photo's that the plenum tube is filled up with debris so the rodding would have cleared it, hopefully you managed to crawl under the car and cut off the first 15mm of the tubes so this kind of debris can be washed out of the tube.

Also I would most certainly changed that horrid pollen filter it looks like its been there for an age.
That pollen filter is the same age as the car----16 years.
__________________
COLVERT is offline   Reply With Quote
Old 24th November 2019, 19:54   #169
oswestryalex
Loves to post
 
Rover 75 1.8T connoisseur saloon 2003 in blue , MG ZT 190+ 2003

Join Date: Jul 2012
Location: Oswestry
Posts: 303
Thanks: 157
Thanked 98 Times in 57 Posts
Default

No photos in the link from this one.
oswestryalex is offline   Reply With Quote
Old 25th November 2019, 14:10   #170
Avulon
This is my second home
 
75/75

Join Date: Oct 2011
Location: Tanelorn
Posts: 4,570
Thanks: 875
Thanked 1,046 Times in 848 Posts
Default

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!
__________________
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
Avulon is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT +1. The time now is 07:01.


Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.
Copyright © 2006-2020, The Rover 75 & MG ZT Owners Club Ltd