|
||
|
|
3rd November 2020, 14:39 | #1 |
Posted a thing or two
Rover 75 Saloon Join Date: Apr 2019
Location: Under the car
Posts: 1,840
Thanks: 210
Thanked 244 Times in 221 Posts
|
Rust warning - drain tube exit points
Keep a beady eye on this folks.
The two drain tubes that exit under the car (near the ABS modulator bracket on the LHS and the steering column UJ on the RHS) cause rust on the upper surface of the metal around the holes. Here's the LH tube - I've pulled it out of the hole to show the problem. The rubber tubes themselves are clear of debris btw so something funny is going on. More pics later. |
3rd November 2020, 17:17 | #2 |
Posted a thing or two
Rover 75 Saloon Join Date: Apr 2019
Location: Under the car
Posts: 1,840
Thanks: 210
Thanked 244 Times in 221 Posts
|
Caught in the act - the RH tube with an actual drop of rain water.
I pushed this one in (up) and the whole of the upper surface of the metal is soaked with water. The seal on the tube stops it from escaping so the metal stays soaked. I think the compartment that the tube is in is separated by a wall so the water is not getting as far as the steering column UJ area. https://www.the75andztclub.co.uk/forum/showthread.php?t=256144&page=4 Last edited by Blink; 6th November 2020 at 15:53.. Reason: Link added |
18th November 2020, 18:40 | #3 |
Posted a thing or two
Rover 75 Saloon Join Date: Apr 2019
Location: Under the car
Posts: 1,840
Thanks: 210
Thanked 244 Times in 221 Posts
|
More pics
Here's another pic taken from under the car looking up through the hole in the LH lower plenum chamber (i.e. the tube exit hole)(which is out of focus). It shows there's rust around the hole in the upper chamber as well (i.e. the hole in the floor of the ECU/pollen filter chamber) .
This proves that water is running down the outside of the rubber drain tubes and causing rust around both the upper and the lower holes. I whipped the cover off the LH plenum and here's the view looking down through the ECU/pollen chamber to the lower chamber beneath. Here's the tube with the water trail (& muck) clearly visible on the outside. It doesn't help that it's turned into an oval (!) when the hole it's supposed to fit is round. So this is what's happening on the LH side: water runs off the windscreen and drains down under/through the foam strip that's supposed to seal the little plastic bulkhead thingy. Then it runs along the upper chamber floor behind the pollen filter and forward towards the hole. The oval rubber tube doesn't seal the round hole properly so water travels through to the lower chamber on the outside of the tube - it can't drain out through the exit hole so it just sits there. Exactly the same thing happens on the RH side, except there's no plastic bulkhead because the wiper mechanism is in the way. I can't do anything about this side without taking the servo out - or taking the closing panel off. The sealing /waterproofing of these plenums really is lousy! Last edited by Blink; 18th November 2020 at 18:54.. |
18th November 2020, 21:43 | #4 |
This is my second home
R75 Saloon. Join Date: Feb 2009
Location: France/or Devon.
Posts: 14,003
Thanks: 3,851
Thanked 2,167 Times in 1,816 Posts
|
I really like this pic.--Did you draw it yourself ???---
|
19th November 2020, 10:10 | #5 |
Precise
Rover 75 Tourer 2.5KV6 Connoisseur SE Join Date: Mar 2013
Location: Fleet
Posts: 2,956
Thanks: 630
Thanked 617 Times in 480 Posts
|
Blink
"The sealing /waterproofing of these plenums really is lousy!" Could you do better? Design a mass production vehicle which remains completely rust proof 18 years later?? |
19th November 2020, 10:28 | #6 |
This is my second home
MG ZT and Rover 75, Join Date: Jul 2013
Location: Wigan
Posts: 3,276
Thanks: 2,556
Thanked 2,685 Times in 1,037 Posts
|
What if?
If a long rubber tube was bonded to the upper tube, and put through to the underside of the car it would stop any contact with the metal, that's provided a good seal is made at the top. The tubes could be also made slightly longer to give a better run off underneath.
|
19th November 2020, 11:26 | #7 |
Posted a thing or two
Rover 75 Saloon Join Date: Apr 2019
Location: Under the car
Posts: 1,840
Thanks: 210
Thanked 244 Times in 221 Posts
|
|
19th November 2020, 11:22 | #8 |
Posted a thing or two
Rover 75 Saloon Join Date: Apr 2019
Location: Under the car
Posts: 1,840
Thanks: 210
Thanked 244 Times in 221 Posts
|
|
19th November 2020, 16:42 | #9 |
Gets stuck in
MG ZT 260, Rover 75 Connie SE auto Join Date: Feb 2013
Location: Redruth
Posts: 984
Thanks: 1,324
Thanked 399 Times in 271 Posts
|
|
|
|