Re: Flexi joints can do one
Quote:
Originally Posted by
Butcher
That's not the underside, it's the front. The lower flexi seems less knackered if anything.
Still unidirectional, though, suggesting sustained ingress of sh... err, I mean road cack, from one point?
Re: Flexi joints can do one
That part of the exhaust is very hot typically. Just off the top right of the photo is the exhaust port from the engine block. So I wouldn't envisage a lot of condensation there under normal circumstances. Also, that's the side of the pipe, not the bottom, so unlikely to be collected condensate.
Re: Flexi joints can do one
Quote:
Originally Posted by
Ttaskmaster
Still unidirectional, though, suggesting sustained ingress of sh... err, I mean road cack, from one point?
Could be, it's right behind the radiator, so cack could be getting blown in on to it through the front grille.
Re: Flexi joints can do one
Incidentally, I now have a solution, it's being replaced with this at the weekend.
http://www.tuningdevelopments.co.uk/...T86%20FA20.jpg
Mmm shiney.
Re: Flexi joints can do one
Quote:
Originally Posted by
Butcher
That's not the underside, it's the front. The lower flexi seems less knackered if anything.
OK, I see it now.
Quote:
Originally Posted by
Butcher
Could be, it's right behind the radiator, so cack could be getting blown in on to it through the front grille.
That would seem quite possible. As long as it isn't coolant from a pinprick hole in the radiator spraying on it.
Headlamp washers that spray splash through the radiators would only be amusing in someone else's car ;)
There must be water getting in somewhere though. You don't want your lovely shiny stainless pipes getting mucky when fitted, needs to be found!
Re: Flexi joints can do one
Quote:
Originally Posted by
DanceswithUnix
That would seem quite possible. As long as it isn't coolant from a pinprick hole in the radiator spraying on it.
Headlamp washers that spray splash through the radiators would only be amusing in someone else's car ;)
There must be water getting in somewhere though. You don't want your lovely shiny stainless pipes getting mucky when fitted, needs to be found!
I'm not losing coolant, so that seems an unlikely source.
Yes there's water getting in somewhere, the engine bay is not sealed and the front of it is prone to getting crud blown in through the radiator. I don't think it's anything more than that really, and cheap as chips flexis.
Re: Flexi joints can do one
Cars ingest a fair bit of spray when driving in the rain (to the point that intakes have baffles to prevent water droplets getting into the engine), I'd be surprised if a misaligned headlamp washer would make much difference to the engine bay
Re: Flexi joints can do one
That is a mess and looks a cheap part, I know the BMW's have issues with them but at least mine has stainless from the manifold back so the flexi looks in good condition still, not bad for 8 years old and 106k
Re: Flexi joints can do one
That's actually made of stainless steel, just a little heat discoloured... :p
Re: Flexi joints can do one
Quote:
Originally Posted by
Butcher
That's actually made of stainless steel, just a little heat discoloured... :p
think he means the opening photo of the shagged part...not the new replacement
Re: Flexi joints can do one
Quote:
Originally Posted by
Zak33
think he means the opening photo of the shagged part...not the new replacement
So do I. The shagged part is actually stainless steel (allegedly), other than the flex which seems to be carbon steel (judging by the rust).
Re: Flexi joints can do one
is that really stainless ? bloody hell...
Re: Flexi joints can do one
I thought stainless and carbon steel in contact was a bad idea. A quick google finds a chart that say carbon steel is "sacrificial" in that setup.
Edit: Or does it say that, I think it says they both corrode. Oh I dunno, I'm just sure I've had bolts rust up in that sort of situation.
http://www.monarchmetal.com/wp-conte...orrosion_2.png
Re: Flexi joints can do one
Quote:
Originally Posted by
DanceswithUnix
I thought stainless and carbon steel in contact was a bad idea. A quick google finds a chart that say carbon steel is "sacrificial" in that setup.
Edit: Or does it say that, I think it says they both corrode. Oh I dunno, I'm just sure I've had bolts rust up in that sort of situation.
only if they get wet - you need the electrolyte to propagate bi-metallic corrosion, but yes. Stainless next to mild carbon steel = mild carbon steel corrodes. However if the contact surface area : volume is small it can be justifiable to use the combination. Eg stainless steel bolt in mild steel plate ok (bolt won't corrode, and a small bit of rust around the hole generally ok). The other way round is a complete no-go and could lead to failure.
Re: Flexi joints can do one
Quote:
Originally Posted by
ik9000
only if they get wet - you need the electrolyte to propagate bi-metallic corrosion, but yes. Stainless next to mild carbon steel = mild carbon steel corrodes. However if the contact surface area : volume is small it can be justifiable to use the combination. Eg stainless steel bolt in mild steel plate ok (bolt won't corrode, and a small bit of rust around the hole generally ok). The other way round is a complete no-go and could lead to failure.
I think that flexi pipe is located such that it was always going to get wet. Hence a combination of metals seemed odd.
Re: Flexi joints can do one
Quote:
Originally Posted by
DanceswithUnix
I think that flexi pipe is located such that it was always going to get wet. Hence a combination of metals seemed odd.
not if they're intended to be isolated from each other. Rubber gaskets should suffice - anything insulating to break the electron flow