[s-cars] S4 sighting

[Robin Stoddard]

Based on what i am reading here; I still see the inline 5 AAN engine as the most versatile race/track engine.  While the 2.7tt is a great engine, I am plagued with oil cooling issues.

Cheers
Robin

On 2011-12-30, at 7:35 AM, Taka Mizutani <t44tqtro at gmail.com> wrote:

> D2 A8s are fine- they have a timing belt. But the rear timing belt Audi
> 4.2s have a problem with the chain guides failing (brittle plastic) and
> then the chain guides break off, losing chain tension which subsequently
> causes a loss of timing. The guys on the list running Audi V8s, UrS and
> even the D2 S8s don't know how good they have it. :-)
> 
> The same issue afflicts MBZ V8s- at least the W211 E500s and other cars of
> the same vintage (ML 500, S500, etc.). Same thing with E39 BMW V8s. But
> what I was saying was that at least BMW and Benz put the chain in the
> front, so you merely have to take off the front bumper, ac condenser,
> radiator, fan, all the belts off the front of the engine, then the valve
> covers and intake manifold (that part is ridiculous), then you have access
> to it. Unlike the Audi where you have to remove the engine and
> transmission, separate the two, do the chain guides on an engine stand,
> then put it all back together. The difference in labor is at least triple
> if not four times the job of the E39.
> 
> I don't know enough about the Valvetronic V8 in the later BMWs (E60, E65,
> E63, etc.) or the Benz E550 engine to say that the problem still exists.
> The timing chain problem has been a longstanding issue, present in W126
> S-Classes as well and probably in your W124 500E, Mike. Make sure you don't
> have a rattle on cold start up.
> 
> Engines running full synth their whole lives are pretty clean- I just saw a
> few S54s opened up with 70 and 80k miles with a light varnish, nothing
> else. Relatively clean and looking to go another 100k. The RS4 issue is a
> by-product of direct injection- a lot of DI engines have a similar carbon
> buildup issue. I wonder if adding water injection into the intake manifold
> would help that.
> 
> BTW, what's the issue with the later MLs? I thought that they were
> generally well-made trucks- I know the interior is very much about hard
> plastic, but otherwise.....
> 
> 
> Taka
> 
> 
> 
> On Fri, Dec 30, 2011 at 8:54 AM, Michael Lardizabal <
> mikellardizabal at yahoo.com> wrote:
> 
>> Taka haiku'd .....
>> 
>> 
>> 
>>> I wouldn't put one of those V8 atrocities on anyone- no thanks. I think
>> the Germans have forgotten how to build a V8 properly- the MBZ V8s and the
>> BMW V8s have similar chain guide problems, although their problems are at
>> the front of the engine, where it is merely a 8-10 hr. job rather than the
>> stupidly ridiculous job it is to fix on the rear timing chain Audi V8.
>>> 
>> 
>> I honestly feel that the Germans are building very powerful and efficient
>> V8's > especially if you take into account hp/liter .....its just that they
>> now ( at least since 03..IMHO ) diligently design-in " planned obsolescence
>> " .
>> 
>> Our 2010 Mercedes ML350 is a technological marvel for an SUV....its got
>> barely 30K on it, I really don't see this truck running well past 100K .
>> 
>> On the other hand..my old Mercedes 500e and my previous AMG C
>> class......now those cars will go into the 500K range w/o ever opening up
>> the motors. Where's the money in that ?
>> 
>> I say since 2003 because just last week I saw up close a 4.2 from an 01 A8
>> that skipped a belt. Pistons and cylinder walls + chain drive looked like
>> the day they left Ingolstadt !
>> 
>> Twas really quite a sight to see how little to no wear 120K had on this
>> motor. The valves looked like ass, but nothing that would deter it from
>> going another 40-50K w/o flinching...and no where near as slime-sludged  as
>> the pics the B7 Rs4 guys post up on a regular basis. The A8's gunk was more
>> old-skewl hard build up.
>> 
>> Pre- FSI splendor.
>> 
>> Mike L
>> 
>> --- On *Fri, 12/30/11, Cody Forbes <cody at 5000tq.com>* wrote:
>> 
>> 
>> From: Cody Forbes <cody at 5000tq.com>
>> Subject: Re: [s-cars] S4 sighting
>> To: "Taka Mizutani" <t44tqtro at gmail.com>
>> Cc: "Tom Heitzman" <gyro at stuffinder.com>, "s-car-list-bounces at audifans.com"
>> <s-car-list-bounces at audifans.com>, "Robert Myers" <bob at chips-ur-s.com>, "
>> s-car-list at audifans.com" <s-car-list at audifans.com>
>> Date: Friday, December 30, 2011, 1:42 AM
>> 
>> AFAIK all VAG engines with a timing chain put it on the back of the engine
>> even going back to the older VR6's.
>> 
>> What's wrong with the S5 V8? It's not the same as the troublesome B6 S4
>> V8, the FSi V8's are a clean sheet design and as far as I've seen are as
>> reliable as any other VAG engine.
>> 
>> -Cody (mobile)
>> 
>> On Dec 29, 2011, at 6:25 PM, Taka Mizutani <t44tqtro at gmail.com<http://mc/compose?to=t44tqtro@gmail.com>>
>> wrote:
>> 
>>> I haven't driven the S4 with the 3L supercharged, but the A7 with the
>> 3.0T was quite a nice setup. I imagine a more performance-oriented setup
>> would be even better.
>>> 
>>> I wouldn't put one of those V8 atrocities on anyone- no thanks. I think
>> the Germans have forgotten how to build a V8 properly- the MBZ V8s and the
>> BMW V8s have similar chain guide problems, although their problems are at
>> the front of the engine, where it is merely a 8-10 hr. job rather than the
>> stupidly ridiculous job it is to fix on the rear timing chain Audi V8.
>>> 
>>> Cody- is the V6 supercharged a conventional timing chain setup?
>>> 
>>> 
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