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Old 23-04-07
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Audi - porous cylinder head?

Guy at work has a 2.0tdi Audi A3, been losing lots of water. Dealer has told him it's a porous cylinder head! Anyone heard of this before? It's only done about 10k.
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Old 23-04-07
mikebrown
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Re: Audi - porous cylinder head?

had to have a quick reality check that it wasn't april 1st...never heard of a porous cylinder head before...what would be the point...my money is on the dealer having a bit of a laugh or even taking the proverbial...
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Old 23-04-07
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Re: Audi - porous cylinder head?

that's what I thought. Apparently they had it in over the weekend. Pressure tested the engine as it had been losing water and said it's not the gasket it's this mysterious porous cylinder head
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Old 23-04-07
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Re: Audi - porous cylinder head?

explaination of what it is:

http://www.topbuzz.co.uk/info/porous...rous_heads.htm
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Old 23-04-07
Nev
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Re: Audi - porous cylinder head?

Normally means bad casting.
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Old 24-04-07
BlueEvo2
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Re: Audi - porous cylinder head?

Originally Posted by Nev View Post
Normally means bad casting.
Seconded; a porous cylinder head is not at all a wind up. Especially when you get the bill from Audi... Even if it's a company wagon you'll wince on their behalf...
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Old 26-04-07
AlfaLincs
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Re: Audi - porous cylinder head?

If its a porous cylinder head..then the first thing you do is demand that Audi replace it free of charge...FULL STOP. This is a manufacturing fault.

When I worked briefly at a Honda motorcycle dealership in the late 70s we had a 400/4 that leaked oil in a way we had never seen. It was not under warranty but Honda footed the bill for all the parts we had to replace as the castings were porous. When the Honda rep visited to 'inspect' the parts..block/crankcase etc all he did was bring a hammer and smash them to bits to make sure they did not reappear on another bike

AlfaLincs
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Old 26-04-07
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Re: Audi - porous cylinder head?

Cool! Being Japanese, the porous head no doubt appreciated the official hari kari performed on it by the company's rep' for bringing dishonour on the brand!


Ralf S.
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Old 26-04-07
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Re: Audi - porous cylinder head?

Saw it once on an aluminium alloy piston, that leaked on the compression stroke, through a pin hole which 'Hepolite' said was caused by the reaction of a grain of casting sand being entrapped,which subsequently 'blew through'?: Perhaps they no longer cast in this fashion??
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Old 26-04-07
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Re: Audi - porous cylinder head?

Vauxhall had lots of trouble with this on their 2 litre 16 Valve engines in the late 1980's and early 1990's IIRC.

May dad had problems with his Calibra 16 Valve cos of it.
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Old 26-04-07
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Re: Audi - porous cylinder head?

I had this problem with the rocker cover on my Orion 1.6i years ago. A few days after cleaning there would be a thin oily deposit on the rocker cover. I got this replaced by my Fraud dealer FOC.
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