Next time you're under have a look 👀

[Sloppysod]

Just serviced my C5, and while doing an inspection of pipework I noticed this, on closer thought, it looks like aluminium heatshield attached to the undertray has been rubbing on this pipe and starting to wear a hole. - new pipe required.......££'s

[KennyW]

Got the same on my C5, took a cable tie pulled the pipe away and attached it to part of the aluminium support for the front bumper.

Kenny

[Sloppysod]

Got the same on my C5, took a cable tie pulled the pipe away and attached it to part of the aluminium support for the front bumper.
Kenny

Yep, done exactly the same until I can get a replacement pipe.
Update, looked at price of part around £100 so going to cover worn area with cycle innertube repair patches
https://peugeotcitroendsparts.com/produ ... 35222.html

[aerodynamica]

Erk, better check mine. Thanks for the heads up!

[MattBLancs]

.
Update, looked at price of part around £100 so going to cover worn area with cycle innertube repair patches

A good idea, can't help wonder if the rubber patch's adhesive will tolerate the temperatures on a hose like that? (No idea of a bike tyre operating temperature, am sure someone will chip in saying it's 150°C or much higher than I would guess!)

Matt

[Sloppysod]

Hi Matt, did think of that but, its the lower pipe, which is the colder of the two, and the rubber patches are to reinforce the damaged area to try to prevent a tare starting. But I think I'll add a bit of duct tape to the outside over the patches, because as they say - "every little helps"

[MattBLancs]

Ok, I had a quick Google search, I've learnt:

• Cycling forums can be right bitchy places

• You might see 230°C surface temperature at the wheel surface

https://weightweenies.starbike.com/foru ... hp?t=56710

I've not found duct tape very durable, long term, adhesive dries out and it just falls off! So would leave that off personally. Try the patch and see what happens is my suggestion

Matt

[myglaren]

What about aluminium tape?
That is from Screwfix but there are sure to be lots of options.

Or heat resistant tape (Amazon).

[Sloppysod]

Ok, I had a quick Google search, I've learnt:

• Cycling forums can be right bitchy places

• You might see 230°C surface temperature at the wheel surface

230°C is hight, but don't car cooling systems run at about 110°C so I would presume that the lower pipe would be less.

https://weightweenies.starbike.com/foru ... hp?t=56710

I've not found duct tape very durable, long term, adhesive dries out and it just falls off! So would leave that off personally. Try the patch and see what happens is my suggestion

Matt

Yes, you could be right about the duct tape failing after a while. it was more to give the area some protection.

What about aluminium tape?
That is from Screwfix but there are sure to be lots of options.

Or heat resistant tape (Amazon).

Aliminium tape is probably not flexible enough.
Back to the thinking board...........I do have some Butyl tape left over from laying my composite deck during the summer.

[CitroJim]

Using a cycling tyre repair patch might work for a while but in my experience the patch and adhesive have absolutely no resistance to oil whatsoever...

Ok, I had a quick Google search, I've learnt:

• Cycling forums can be right bitchy places

• You might see 230°C surface temperature at the wheel surface

You're not wrong about cycling forums Matt and I speak as a cyclist - I go nowhere near them...

230 degrees? No way, not even when I'm TT racing can I get my tyres that hot!

[MattBLancs]

230°C is hight, but don't car cooling systems run at about 110°C so I would presume that the lower pipe would be less.

Yep, agree. Normal operation about 90°C, worse case stop start traffic towing a trailer through Death Valley probably still under 120°C - start to reach the artificially increased boiling point limit of the radiator expansion cap about that point I think.

[MattBLancs]

Using a cycling tyre repair patch might work for a while but in my experience the patch and adhesive have absolutely no resistance to oil whatsoever...


You're not wrong about cycling forums Matt and I speak as a cyclist - I go nowhere near them...

230 degrees? No way, not even when I'm TT racing can I get my tyres that hot!

Ah good point about oil resistance,

Yes I was more than a little surprised at the figures quoted, seemed very high.


Thinking about this again, as we are seeking only abrasion resistance, and not an attempt to seal the hose - would it best course of action to:

• bash the aluminium heat shield / Add additional pop rivets if moving away from the plastic undertray?? To ensure is well clear of the hose

• Add a plastic spiral wrap (like the cable tidy stuff?) To offer a sacrificial material for the heat shield to chomp on. Will see if I can find a picture of what I mean

[MattBLancs]

https://www.screwfix.com/p/philex-5-x-8 ... y-2m/62303

This kind of stuff

[Sloppysod]

https://www.screwfix.com/p/philex-5-x-8 ... y-2m/62303

This kind of stuff

Yes but it's got he around 1½ inches (38.1mm to the youngsters) diameter. The original pipe has a plastic/nylon type expandable sleeve so even the Citroën engineers thought this may be a problem.

[elkc5]

Self-amalgamating tape is really good, clean (very) the pipe and wrap it round, in hours it becomes solid rubber to protect the worn bit, I always have it, finding it's another matter.