brake hoses rusting

afennell

Member
good evening,

I have been keeping my eye in the market, I have Ben running the mot history on a few cars and there are a significant number flagging up with corroded brake hoses.

Is this a common issue?
 
yes on the Daily drivers... goes the same for any DD car imo. However IDK if they are more exposed on this platform but the z4 in general does seem to have this issue more than other cars for the same age bracket.... then again, they are a decade old....
 
Same as most BMW's many of which use the same brakes, and to be fair most makes these days. Standard hoses are currently about £12 a piece on Eurocarparts and an easy DIY fix, or relatively cheap to have done particularly if you are having a service and brake fluid change anyway. Not a biggie but a worthwhile bargaining point.

Good luck with your search :thumbsup:
 
Beedub said:
I'm guessing the OP means the actual metal lines that run the length of the car??

Could be I suppose but the OP said hoses which are the most common MOT advisory/failure when the metal ferrules corrode. Pipes are obviously a far, far bigger job but a big percentage are actually hidden and often not picked up on. Worthwhile checking if the advisories are actually the hose or pipes then :thumbsup:
 
A favourite on the z4 is the front to rear brake pipe as it emerges from under a plastic cover, it's worth cleaning up & coating with grease etc to preserve it :thumbsup:
Rob
 
My indy highlighted that my brake lines were starting to look a bit corroded within the arches on one of my inspections.

I cleaned them up with a bit of brake cleaner and once all the crud was off them they didn't look that bad at all. Once clean I gave them a coat of black hammerite. :thumbsup:
 
Most common fail point seems to be where they emerge from the underbody plastic shield and follow the ns wheel liner. That point there and where one emerges on the os having crossed the car. There's also the horrible short length of pipe down each rear suspension arm that can easily be eliminated by longer braided hoses.

As posted above in fairness it's the most common point on most cars. More water thrown up and less engine/ exhaust heat to keep them dry, plus up to 14 years old or a decade for ///M's
 
cj10jeeper said:
Most common fail point seems to be where they emerge from the underbody plastic shield and follow the ns wheel liner. That point there and where one emerges on the os having crossed the car. There's also the horrible short length of pipe down each rear suspension arm that can easily be eliminated by longer braided hoses.

Spot on, these were the worst sections on mine with most build up of caked on dirt. Good tip on extending the braided hoses at the rear too. :thumbsup:
 
frazell said:
cj10jeeper said:
Most common fail point seems to be where they emerge from the underbody plastic shield and follow the ns wheel liner. That point there and where one emerges on the os having crossed the car. There's also the horrible short length of pipe down each rear suspension arm that can easily be eliminated by longer braided hoses.

Spot on, these were the worst sections on mine with most build up of caked on dirt. Good tip on extending the braided hoses at the rear too. :thumbsup:

A few of us have done the conversion using HEL hoses. Spec is in the forum if anyone needs it
 
cj10jeeper said:
frazell wrote:cj10jeeper wrote:Most common fail point seems to be where they emerge from the underbody plastic shield and follow the ns wheel liner. That point there and where one emerges on the os having crossed the car. There's also the horrible short length of pipe down each rear suspension arm that can easily be eliminated by longer braided hoses.Spot on, these were the worst sections on mine with most build up of caked on dirt. Good tip on extending the braided hoses at the rear too. A few of us have done the conversion using HEL hoses. Spec is in the forum if anyone needs it

Bit annoying I didn't know about this sooner as converted to Goodridge steel braided hoses all around about 18months ago. Another job on the list now, damn this forum! :rofl:
 
frazell said:
cj10jeeper said:
frazell wrote:cj10jeeper wrote:Most common fail point seems to be where they emerge from the underbody plastic shield and follow the ns wheel liner. That point there and where one emerges on the os having crossed the car. There's also the horrible short length of pipe down each rear suspension arm that can easily be eliminated by longer braided hoses.Spot on, these were the worst sections on mine with most build up of caked on dirt. Good tip on extending the braided hoses at the rear too. A few of us have done the conversion using HEL hoses. Spec is in the forum if anyone needs it

Bit annoying I didn't know about this sooner as converted to Goodridge steel braided hoses all around about 18months ago. Another job on the list now, damn this forum! :rofl:

Goodridge/HEL practically the same thing, yours will be fine I'm sure. The main area of concern as mentioned is where the actual pipes protrude in the ns rear wheel liner, these cannot be replaced easily. Preventative measures need to be taken with these imo.
 
Thank you for the replies.
I am referring to the pipes running from the front to the back.

I have replaced a few of the small hoses from the caliber but never the solid lines running the length of the car. Just wondered if it's common. Sounds like it's worth checking.
 
afennell said:
Thank you for the replies.
I am referring to the pipes running from the front to the back.

I have replaced a few of the small hoses from the caliber but never the solid lines running the length of the car. Just wondered if it's common. Sounds like it's worth checking.

As noted in the posts above these brake lines corrode at the rear end. Never heard of them going forward of the rear of the underside plastic cover (say 30cm from wheel arch)

That's the point at which I cut off the old pipes and joined in new.

Certainly worth taking the wheels off and checking. If you clean them up you'll avoid a big job in the future.
 
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