147 floor rot - why did Alfa do this? - Page 2 - Alfa Romeo Forum
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Originally Posted by symon View Post
A few years back, say the mid 1990's to the mid 2000's rust proofing on most cars was very good. Manufacturers were selling mainstream cars with 10 or even 12 year anti perforation warranties.

That was when people were used to cars falling apart after 5 years and 80,000 miles.

Now people assume that cars will last longer, so manufacturers have been cuttting costs in the corrosion resistance department. For example Vauxhall has cut it's anti-perforation warranty back to 6 years from 12.

The end result is that cars rust more and don't last as long. This makes them both cheaper to make, and as they don't last as long they sell more new ones.

I really hated my Mk4 Golf in many ways, but in terms of rust resistance it was leagues ahead of most other cars I have owned.
Heh, that fits right in with my theory about mid-90s cars being the ugliest but the best made The only exception to this was the relatively pretty but hopelessly rusty Chrysler-Merc E class, though it's non-cdi diesel engines could outlast granite...
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Originally Posted by kandlbarrett View Post

So can anyone tell me why Alfa put those silly half moon slots in the rear of the floor pan that seem to be the starting point for all the rust. Every one of these slots was its own rust pocket and one of them ended up being a 4" diameter hole.
Hello have you got photos of the 'half moon slots' please?
I'm trying to picture exactly where they are...

I have just discovered a rust hole in my 2001 147..

It's on the Passenger side,
Rear wheelarch front edge behind the carpet-y liner there's a cavity there and the metal of the wheelarch at the bottom there is a hole.
Taking out the inner door panel/ card (3 door) inside below it's a bit wet and you can see right through (or at least if you poke a finger).

The other side is fine and can't see any evidence of any intentional drain hole either.

Not sure what I do next really!.....
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All that rust looks as if it's occuring from the inside out, is that right? So water penetrates from underneath and gets trapped, then rots thinly painted metal?
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From what I've seen of my 156, yes. But in my case the underseal was damaged by someone jacking the car up in the wrong place and cracking the sealant.
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Thanks. I'd better soak the carpets in Waxoyl!
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