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[albitz]

Fancy doing the timing chains on an Audi RS4 ? 
Back of the engine.
http://www.audizine.com/forum/showthread.php/425205-B7-S4-RS4-Timing-Chain-Layout-Picture

[05omegav6]

Proof, if any were needed, that VW couldn't give a rats testicle about long term ownership

Lazy engineers who cba to design a proper solution...

[2woody]

what happens once the car is out of the immediate dealer servicing regime is not a feature of the design process.

why should it be - there's nothing in it for the manufacturer

[cem_devecioglu]

I remember phaetons were not that different

[05omegav6]

True, but if the cars were more readily repairable then people might be more inclined to buy them. Afterall if you owned a nice easy to fix car on a budget, then should you be in a position to buy a new car you would be more likely to stick to that brand than if the cheap second hand car was a pig to fix...

How many people deliberately bought a nearly new Renault having previously owned an older second hand one? And how many of those people went on to buy a new one? Not many I suspect...

Dismissing the second hand market is short sighted imho

My biggest issue with that particular VW brainwave is the fact that they are trying to sell those engines in the marine market, and they simply cannot be repaired in situ.

It has the added consequence of removing most of the Omega replacements from the short list as they are likely to become horrendous to repair/maintain as the mileages climb...

[05omegav6]

I remember phaetons were not that different

They're not... see my last paragraph

[cem_devecioglu]

I remember phaetons were not that different

They're not... see my last paragraph

have a look at this

[05omegav6]

Four chains is definitely lazy engineering... and quite frankly taking the piss

If you must put the timing gear at the back of the engine, at least make it gear driven

[cem_devecioglu]

I think the engineers who designed that sure have many concerns..

[05omegav6]

I think the engineers who designed that sure have many concerns..

Nothing a spot of sectioning wouldn't sort out

[chrisgixer]

Jag v lumps similar iirc.

And the width of it. poxy multi valve over head cam design. A nice push rod 8 valve is what you want.

[05omegav6]

Absokinglutely, with a gear driven cam

Clearly far too obvious for some though

[chrisgixer]

Absokinglutely, with a gear driven cam

Clearly far too obvious for some though

<cough> *chain* <cough cough>
but its a very short chain! about as short as its possible to get between two sprockets. The cam sitting directly above the crank. 

[05omegav6]

Early Cologne V6 gear driven, with cam gear made of plastic (FFS ) pretty bomb proof apart from cam gear and 12k tappet adjustments

Later Cologne V6 chain driven, but still a pushrod lump

If the engineers wanted to be really clever, the could incorporate the cam lobes onto the crank with four pushrods, 2 inlet and 2 exhaust, with one of each either side of the conrods. Alternatively you could have two gear driven cams, one either side of the crank

Would make a nice easy modular engine, say 500cc for each cylinder, V layouts might be a bit longer than ideal, but hey ho, life is a mere compromise...

[Andy B]

Early Cologne V6 gear driven, with cam gear made of plastic (FFS ) ...

Fibre gear .....     For reduced noise IIRC & it worked ....... you can't get much quieter than an engine that's not running!