oh my bad -- I say just keep running it and dont be too worried --- Just check it visually every once in a while -- I wouldnt touch it too much.

Good job

 

resale might be tough

 

Probably not worse than most moded car.

Anyways....I went ahead and took the pulley off today...couldn't wait...lol. It looks GREAT. The key and the keyway look perfect.

 

I like how you assert you point of view based on semantics and your own high opinion of your knowledge.

Materials selection is a fundamental aspect of mechanical or structural engineering. Engineers selected better materials or production processes to create better or "different" parts as you call them. Engineers then decided on the use of those "different" parts for the purposes of higher performance use in an engine systems based on the fit of the mechanical propeties of those parts for their intended purpose.....Nope thats not better engineering..thats just because they wanted to be "different"

I am happy you feel a machine built engine would be better, but seems GM( all Z06 and ZR1 engines), AMG, Ferrari, Lamborghini, and every major race series and team in the world relies on the skill of a highly trained engine builder to produce the best built, highest performing engines possible. Yep, again, no engineering there, just being different again.

Thanks for your internet search on the M113. Good to know they are built with pretty high quality materials and high strength design. That doesn't mean AMG's aren't built with better parts or with better processes.

If AMG's are no better than any other Mercedes, just different as you claim, why did Mercedes feel the need to purchase AMG(who was a seperate company) and make them a wholy owned subsidery? Why do AMG's get made in a specialized factory by highly trained resources?

Yep, ML350 Benz's made on an Alabama assembly line are the same as hand built AMG's in Afalterbach....Neither one is better...they are just "different"....Like you...

I think I get what your saying, but My view is that using better fit for purpose materials/part, in more detailed and controlled processes by people with more skill makes something better engineered.

 

While I don't disagree with everything here, I think we need to look at the different purposes of mercedes vehicles. Also, a stronger part is not necessarily better quality...for instance a forged rod made in china is stronger than a cast rod made in America, but the quality of the machining and the finishing may not be better.

Again, its not better engineering. If one "standard" engineer is presented with the task of creating an engine that makes 300 bhp, will last 300k miles, and will run quietly with minimal oil consumption, and he meets that goal, the engineer has performed to task.

If the AMG engineer is given the goal of 500bhp, he simply uses stronger parts, which are readily available from any number of suppliers, to meet his task. Has he done any "better engineering"?

Now, you may have a point if your attempting to push the limits of power or material strength....but thats not the case here. A 500bhp 5.5L supercharged V8 is not anything new, different or special. I'm pretty sure that I, having essentially no engineering background, could take the 5.0L V8 in my S500, buy a set of CP dished pistons, a set of Oliver rods, and add a kleeman supercharger, and the required fuel and tuning requirements, and make 500bhp with ease. This stuff is simply not that hard...A 2L making 500bhp, now that takes "better engineering".

Now, you say that AMG, Ferrari, Lambo, etc all use hand built engines. That very well may be the case, and while 95% of those engines may be great, you can simply not hit the same consistency standards as an engine built by machine. Furthermore, there is nothing to indicate that a machine could not build an engine of the same performance. Part of this is marketing gimmick. Furthermore, ferrari, lambo, etc probably don't have the economies of scale necessary to see benefit from these "engine building machines".

Why did MB buy AMG? Probably for monetary and quality control reasons. Do you have any better reasoning?

Why are they built in a special factory? Again, I don't know...do you? What about the AMGs are hand built? Certainly not the car itself?

As for the alabama ML, whose talking about that? The ML has proven to have quality issues. But comparing a built in germany E500 to an E55 of the same year, I've found zero indication that the AMG has higher build quality. The reality is that these cars share a vast majority of their parts.

 

You should see the video of an M3 engine being built,every single bolt is torqued to spec and is then put into the computer and the computer tells exaclty what to spec the next bolt.Every engine is built a little different and no machine in the world can come close to the specs bmw M power uses.

Watch this small video of an m3 engine being built

http://www.youtube.com/watch?v=EcvD_VaJ2UE

Then the engine hits the dyno

http://www.youtube.com/watch?v=5TDLn6c0pwA

 

now, watch the hour long video no the McLaren MP4-12c

http://www.autocar.co.uk/News/NewsAr...llCars/248298/

That to me is "better engineering"...not a car like the SLS.

 

I thought you rather have a machine built engine anyways.

Look up gt3 testing to see how brutal they are on the engine dyno.

The car that I showed you is not 275,000 its 50,000 plus options.Im pretty sure BMWs mclaren F1 engine was built by a machine too lmfao

 

And yet this still happens??

 

Guess you've never seen the History Chanel feature in Ultimate Factories and how the SLS is built!

 

Links not working Jim

 

Your statements don't make any sense...could you clarify.

Every engine is built a little differently? Is that good to you? Its not to me? I want my engine to produce what every other one does. What if you get the engine that produces less power? Are you ok with that?

You say "no machine in the world can come close to the specs bmw M power uses"

Can a human file a ring better than a computer? Can a human torque a bolt more accurately than a computer?

What specs are you referring to? Bearing clearance? ring gap?

If a computer can measure the specs (which it can, and does), then it can assemble an engine to that spec.

 

sure have.

yawn

 

I would prefer a machine built engine. But consider McLaren produces what, a few hundred to a few thousand street engines per year, I doubt it makes financial sense to invest in machines that will assemble their engines.

What does the sturdiness of a GT3 engine on a dyno have to do with this?

 

No buddy,when I say every engine is built a little different I ment that one bolt get torqued xxx then they input that spec into the computer and the system tells then exaclty what to torque the next bolt,every M engine will have different torque specs since not every engine is the same.

Watch the video of the guy with the 50,000 dollar torque wrench.

 

So I guess the torque tube on the SLS is just a $h1t piece of backyard engineering...

You sir are a fool!

 

As much as we would wish any car we own to be something uber special, there is reality. Daimler is a for-profit company with shareholders wanting a return on their investment. They aren't running AMG as simply a cool toy to have in their toy box. They bought it because they want to turn a profit (and not only from the individual products, but also from the exposure it gives Daimler; e.g., the E63 can actually help sell E550s, etc..)

Good products can be well designed and well built, but there are parameters that need to always be considered and that has to do with the worldwide reality of profitability, materials, labor costs, assembly, vendors, production, regulations, reliability, emissions, fuel economy, projected sales, marketing, etc., etc..

The videos and the "Ultimate Factory" TV shows are fun to watch. But the are 'ultimately' marketing tools in themselves. Granted the SLS is a well built and well engineered car but it also has parameters that must be followed in order to be a profitable product. And Daimler board members aren't sitting around arguing about forged rods.

 

Interesting. So lets say a computer torqued one bolt...then automatically fed that torque data into itself, and then instantly recognized the correct torque for the next bolt. How is that any different than a human doing it?

I love how you talk about how great human construction is, while expounding on the benefit of a computerized torque wrench.


I'm a fool? Porsche put a torque tube in the 928 back in 79. A c5 corvette has a torque tube. wow, its carbon fiber? bfd. My mustang had a carbon fiber drive shaft. This is nothing even close to new.

how about the SLS is a standard aluminum uni body. The mclaren is a carbon monocoque.

that is the difference between a good road car for the street and a race car made street legal.

 

And why is that? Because a CF Monocoque is "better" suited for stiffness and torsional loading, while maintaing light weight? IE: better engineered materials and applying them in a better process to develop a performance product.

However I will give you that and SLS and a 12c are not meant to compete together anyhow...I am actually amazed that McLaren can sell those things at 200G's

 

What does any of this have to do with a pulley? I understand the value of a good debate, but this is becoming laborious and has nothing to do with the fact that the OP came up with a solution to his problem that seems to be working.

GT-ER I once again applaud you and hope this works long term for you as I believe it will. Once everything is torqued down with the solution you've come up with, it becomes one unit and will probably act as such for many years to come. Hats off and please keep us updated.

Regards

 

No the cf monocoque requires far more engineering to make it street compliant vs. a unibody, and cannot be compared to simply changing from a forged to hyper piston or forged vs cast rod. MB just takes a platform and modifies it...MC has absolutely revolutionized road going sports car chassis construction.

its absolutely irrelevant, but I take issue with people making ridiculous comments that have little to no basis in fact.

 

Thanks! I just ordered a new seal and bolt to get put the pulley back on and hopefully it'll be the last time I do it...EVER!

I've been ignoring my own thread since it has obviously...


LOL... Hopefully it'll be of some help to someone in the future what may find themselves in the same situation.

 

The good thing is, they won't have to read through the above, to figure it out. I mean really...getting a bit ridiculous, don't you think?

 

Here's something interesting.
http://www.unitcat.ru/mercedes/7/1/1/113986/07F/03/015/

Apparently there's a separate part # just for the woodruf key. Part #006888005005 (number 11)

 

FWIW, my homestyle key is still holding strong. Yesterday I did two 100+mph runs and WOW does it pull!