Engine pics (looking for the hard ribbed plastic pipe)

Post pictures of your Volkswagen T-Roc here
Post Reply
Florin
Posts: 4
Joined: Tue May 04, 2021 9:48 pm

Engine pics (looking for the hard ribbed plastic pipe)

Post by Florin » Sat May 08, 2021 11:50 am

This has to do do with "the strange whistle-like noise" post that I wrote a couple of days before. In reply to my post, Rocadoodledo, whose car has the same problem, came with a possible solution, suggested on another forum by another member, though it seems the whistle-like noise was similar : "Right, so looking under the bonnet, just behind the engine coolant header tank, there is a space/partition etc where there are two small pipes coming up out of, they are connected to hard plastic connectors, one is a smooth walled rubber pipe and the other, from factory, is a hard ribbed plastic pipe. If you follow this hard ribbed plastic pipe, you will see that it ends up getting connected to a "blob" that is clipped into the driver's side of the engine area. That pipe is only 9 inches > 12 inches long, it is that second pipe that gets replaced with a smooth wall rubber pipe with the quoted part number printed on to it."

I have no idea if the T-Roc 1.0 TSI engine is the same as a 1.2 TSI Polo's ( probably not), though, who knows, maybe there's a hard ribbed plastic pipe somewhere here as well that is causing the noise I'm complaining about. So, if anyone can identify it ( I couldn't, but I'm totally "illiterate" when it comes to engines), please draw a circle around it. Thanks so much!

Engine 1.jpg

Engine 2.jpg

Engine 3.jpg


User avatar
Deleted user 925
Posts: 276
Joined: Sun Dec 20, 2020 1:53 pm

Re: Engine pics (looking for the hard ribbed plastic pipe)

Post by Deleted user 925 » Sat May 08, 2021 12:06 pm

I would think the ribbed pipe is probably just a protective sleeve over a smooth rubber pipe inside 🤷‍♂️
September 2018 1.5 tsi R-line manual,
revena blue,
black roof,
towbar.

Rocadoodledo
Posts: 122
Joined: Wed Aug 14, 2019 4:18 pm
Location: Cambridgeshire

Re: Engine pics (looking for the hard ribbed plastic pipe)

Post by Rocadoodledo » Sat May 08, 2021 7:00 pm

Hi Florin.
Here are a couple of photos of the EVAP components of my engine taken from the back of the engine bay looking forward. I looks to me as if there are two parts to the hard ribbed plastic pipe, one from the fuel tank via the bulkhead to the EVAP unit, and another section from the EVAP to the engine. I'm wondering if the Polo owner actually had the whole EVAP setup replaced rather than just a single pipe, without knowing it. It would make more sense if the noise was coming from the actual valve rather than a single pipe. Perhaps the part number he gave was for the whole setup. Unfortunately my engine only makes the noise occasionally, and only on the move, so I can't stick my ear on the unit to check.
I'm not sure if the smooth pipe seen next to the ribbed pipe has anything to do with the EVAP system.

20210507_164421.jpg

20210507_164342.jpg

T-Roc 1.0L Design, Turmeric Yellow/Black
Act Displ, Nav, Dr Modes, R-Camera, Fogs, Pk Ass.
Winter Pk, Silver Rails, Voice Activ, Lumb Sup.
Ordered 21/3/19
St2 : 26/3/19
St3 : 18/10/19
St5a&5b : 13/11/19
St6 : 03/12/19
St7 : 13/12/19
Collected 20/12/19

Tricky2
Posts: 195
Joined: Sun Mar 22, 2020 2:37 pm

Re: Engine pics (looking for the hard ribbed plastic pipe)

Post by Tricky2 » Sat May 08, 2021 10:50 pm

Florin wrote:
Sat May 08, 2021 11:50 am

I have no idea if the T-Roc 1.0 TSI engine is the same as a 1.2 TSI Polo's ( probably not), though, who knows,
No, the 1.2 engine is 4 cylinder, the 1.0 is 3 cylinder. Totally different.

Tricky2
Posts: 195
Joined: Sun Mar 22, 2020 2:37 pm

Re: Engine pics (looking for the hard ribbed plastic pipe)

Post by Tricky2 » Sun May 09, 2021 1:49 pm

I think this may be a red herring: My T-CROSS has exactly the same pipes and layout and i have no whistling. This sounds (sorry for the pun) like a ROC specific issue.

WIN_20210509_14_43_11_Pro.jpg

WIN_20210509_14_42_57_Pro.jpg


Impala
Posts: 2077
Joined: Sat May 12, 2018 3:03 pm

Re: Engine pics (looking for the hard ribbed plastic pipe)

Post by Impala » Sun May 09, 2021 2:33 pm

Maybe the whistling is coming from the Infotainment system while it waits for the new map data to be transferred from usb :lol: :lol: :lol: :lol:
1.5 TSI DSG R-Line MY19 Indium Grey, rear view camera, park assist.
Ordered 22/06/18
Built w/c 25/03/19 :(
With dealer 13/05/19 :P
Collected 20/05/19 :D

Rocadoodledo
Posts: 122
Joined: Wed Aug 14, 2019 4:18 pm
Location: Cambridgeshire

Re: Engine pics (looking for the hard ribbed plastic pipe)

Post by Rocadoodledo » Sun May 09, 2021 4:21 pm

Impala wrote:
Sun May 09, 2021 2:33 pm
Maybe the whistling is coming from the Infotainment system while it waits for the new map data to be transferred from usb :lol: :lol: :lol: :lol:
:lol: :lol: :lol: :lol: :lol:
T-Roc 1.0L Design, Turmeric Yellow/Black
Act Displ, Nav, Dr Modes, R-Camera, Fogs, Pk Ass.
Winter Pk, Silver Rails, Voice Activ, Lumb Sup.
Ordered 21/3/19
St2 : 26/3/19
St3 : 18/10/19
St5a&5b : 13/11/19
St6 : 03/12/19
St7 : 13/12/19
Collected 20/12/19

Rocadoodledo
Posts: 122
Joined: Wed Aug 14, 2019 4:18 pm
Location: Cambridgeshire

Re: Engine pics (looking for the hard ribbed plastic pipe)

Post by Rocadoodledo » Sun May 09, 2021 5:09 pm

Glad, Tricky, that your T-Cross with exactly the same EVAP system doesn't have the intermittent " whistle - peeeeping " noise as the T-Rocs owned by Florin and myself. However, exactly the same noise under the same conditions was traced to the EVAP purge system in a polo owners car and cured by replacement. Whether, more recently, the " fault " is confined to T-Rocs remains to be seen. It would seem that manufacturing quality control of the EVAP system parts could be at fault here, or simply wear and tear on a substandard part. As our two T-Rocs are both MY20 it may be that our purge valves are both from a bad batch. Recent VW cars seem to be hit and miss where quality is concerned, look at the mooing brakes and kangarooing issues, some identical cars did and others didn't. I'm going to monitor the peeeeping noise, which is infrequent and intermittent at the moment and see what happens. If it gets worse it'll be a visit to the workshop, if not then I can probably wait until the next scheduled service. I still love the T-Roc though.
T-Roc 1.0L Design, Turmeric Yellow/Black
Act Displ, Nav, Dr Modes, R-Camera, Fogs, Pk Ass.
Winter Pk, Silver Rails, Voice Activ, Lumb Sup.
Ordered 21/3/19
St2 : 26/3/19
St3 : 18/10/19
St5a&5b : 13/11/19
St6 : 03/12/19
St7 : 13/12/19
Collected 20/12/19

Post Reply