Aluminium Exhaust Back-Box?

gobongo · Post by **gobongo** » Fri Dec 01, 2006 11:03 pm

My exhaust is knackered - back box fell off, but it needs to be replaced all the way up really (I think the bit up to the turbo is ok).

I am tempted by one of the custom stainless steel systems (MIJ or probably Longlife as they have a Bristol branch), but it's a bit close to christmas, and £300 would hurt a bit.. My Dad saw this £65 Ali back box on eBay - anyone got any thoughts on these?

Dago & Mrs D · Post by **Dago & Mrs D** » Fri Dec 01, 2006 11:18 pm

The suppliers website states 'galvanised aluminium'.
Is this correct?
Usually you galvanise steel, or anodise aluminium, for protection against corrosion.
I've not come across galvanised aluminium before.

Dago

samuel · Post by **samuel** » Fri Dec 01, 2006 11:21 pm

Never knew there was anything called 'galvanised aluminium'. Very strange. Aluminium has a such a low melting point. Why make exhausts from them?

Puzzled

But i'm always willing to learn something new.

gobongo · Post by **gobongo** » Fri Dec 01, 2006 11:21 pm

Me neither... seems a bit odd.

Anyway - if I do need to replace a few other sections - looking at the prices of the other bits it would be better value to replace the whole thing... maybe I will be off to Bristol tomorrow..

Spike · Post by **Spike** » Sat Dec 02, 2006 12:20 am

gobongo,
I drove mine around for months before i had a new SS 1 fitted, so dont rush get it sorted just get it done before the M.O.T.
Cheers
Spike

gobongo · Post by **gobongo** » Sat Dec 02, 2006 12:37 am

cheers spike..

that's good to know - i was wondering what might be the downside of driving around with no backbox, apart from odd noise and poorer fuel economy..

trevd01 · Post by **trevd01** » Sat Dec 02, 2006 1:46 pm

Aluminised steel exhausts are quite common. Better than 'silver' paint, not as corrosion resistant as stainless steel.

Ebay description misleading, probably breaks various ebay selling rules.

Is this the same person advertising replacement radiators to buy 'when your temp gauge reaches half-way' by any chance?

Peg leg Pete · Post by **Peg leg Pete** » Sat Dec 02, 2006 9:40 pm

Sounds dodgy to me. better ask Santa for a stainless exhaust

Bingabanga · Post by **Bingabanga** » Sun Dec 03, 2006 9:44 pm

Yes i queried this with the seller I dont think you can galvanise aluminium he came back and just said yes galv ali !!! I have my doughts

bongolow · Post by **bongolow** » Sun Dec 03, 2006 10:02 pm

A quick google on 'galvanised aluminium' throws up lots of sites, so it looks ligit. One use is for roofing and guttering...

http://www.nfrc.co.uk/CoPartners.aspx?MemberID=1012

trevd01 · Post by **trevd01** » Sun Dec 03, 2006 10:57 pm

I still don't believe it! Galvanised steel, anodised aluminium, alumised steel, yes.

Galvanised alumininium no.

From wikipedia

Galvanization or galvanisation refers to any of several electrochemical processes named after the Italian scientist Luigi Galvani.

1. Originally, galvanization was the administration of electric shocks (in the 19th century also termed Faradism, after Michael Faraday). It stemmed from Galvani's induction of twitches in severed frogs' legs, by his accidental generation of electricity. This archaic sense is the origin of the meaning of galvanic when meaning 'affected/affecting, as if by a shock of electricity; startled'[1]. Its claims to health benefits have largely been disproven, except for some limited uses in psychiatry. See also: Galvanism, Violet wand
2. Later the word was used for processes of electrodeposition. This remains a useful and broadly applied technology, but the term "galvanization" has largely come to be associated with zinc coatings, to the exclusion of other metals.
3. In current use, it typically means hot-dip galvanizing, a chemical process that is used to coat steel or iron with zinc. This is done to reduce corrosion (specifically rusting) of the ferrous item; while it is accomplished by non-electrochemical means, it serves an electrochemical purpose.

Colin Lambert · Post by **Colin Lambert** » Mon Dec 04, 2006 1:09 pm

I don't believe it either. Probably come from the same shop that sells chocolate tea pots.

bongolow · Post by **bongolow** » Mon Dec 04, 2006 1:35 pm

Maybe the word 'galvanised' has become a generic term for a coating process that has the equivelent anti-oxidising effect on other materials that true galvanising has on steel. Rather like 'perspex' (a trade name) is used as a generic term for acrylic, and we 'hoover' the floor.

If you catch my drift.

Seeker · Post by **Seeker** » Tue Dec 05, 2006 6:41 pm

I found stainless steel exhausts cheaper than the genuine article, and after 5000Kl just as quiet. MIJ of Walsall, they are on the net.

cezeta · Post by **cezeta** » Tue Jan 02, 2007 11:23 pm

the boxes are steel, the galvanised bit is the electroplating process that gives it a none rusting surface which is kind of etched into the steel.

its no con, firstly I buy brackets that have the same process done to them plus I fitted one of these boxes on my girlfriends van a couple of years ago and there s no sign of rust yet and we drive on the beach!

the only mistake i made was not to buy the complete pipe as i have since replaced the mid section and I'm about to buy the front section too

I buy my filters etc from eBay too, it easier than talking to a miserable parts guy that thinks the world owes him a favour

Aluminium Exhaust Back-Box?

Aluminium Exhaust Back-Box?

aluminium exhaust