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Blew my R8 engine.......AGAIN

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Old Nov 3, 2009 | 01:06 PM
  #46  
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Originally Posted by The G Man
Carbon build up behind the intake valves is a common with all direct injection engines.
The problem is that, with a direct injection system, the fuel is introduce in the combusion chamber, therefore the detergent in the gas cannot get behind teh vlaves to clean that area like a regular fuel injected engine. The exception is the Lexus direct injection engines, which use both direct and port injections.
In other words, direct injection may be more efficient but ultimately more harmful to the engine than port injection.
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Old Nov 3, 2009 | 01:13 PM
  #47  
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Originally Posted by FisforFast
In other words, direct injection may be more efficient but ultimately more harmful to the engine than port injection.
Not really more harmful but just more maintenance. They can clean that carbon off with a blast of solvent or sand blast it off with crushed walnut shells if it is real bad.

Last edited by The G Man; Nov 3, 2009 at 01:18 PM.
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Old Nov 3, 2009 | 01:41 PM
  #48  
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Originally Posted by The G Man
Not really more harmful but just more maintenance. They can clean that carbon off with a blast of solvent or sand blast it off with crushed walnut shells if it is real bad.
That's if the heads are off for a rebuild. You can suck in a cleaner like GM Top Engine Cleaner, Mopar Combustion Chamber Cleaner, or a good induction system cleaner, heck even water CAREFULLY via the intake system to clean off the valves.
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Old Nov 3, 2009 | 07:57 PM
  #49  
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I prefer the run it hard often method
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Old Nov 3, 2009 | 09:54 PM
  #50  
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Originally Posted by I8ABMR
This is going to turn me off to Audi more. I knew the older Audis were unreliable but I guess nothings changed but the date. No matter how much you love a car or how well it performs , this will turn you the hell off. 2 engines??? when was the last time you heard anything like that from a Japanese manufacturer. Now that I think of it I don't even think I would expect 2 blown engines from an American manufacturer
Have you peeped over in the ES section?? There are PLENTY of threads regarding locked up/blown engines due to sludge buildup. I don't think the owners went thru 2 engines, however there are some def problems. I jump in there from time to time to nose around. Don't think the current ES350 is suffering from the problem, but then again, I haven't been over there in awhile.
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Old Nov 4, 2009 | 05:58 AM
  #51  
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Originally Posted by nthach
That's if the heads are off for a rebuild. You can suck in a cleaner like GM Top Engine Cleaner, Mopar Combustion Chamber Cleaner, or a good induction system cleaner, heck even water CAREFULLY via the intake system to clean off the valves.
Yes, thats correct, if the build is minor, they can run the solvent thru the intake to clean off the carbon.
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Old Nov 4, 2009 | 06:10 AM
  #52  
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should have got a gt-r. i keed i keed.
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Old Nov 4, 2009 | 09:06 AM
  #53  
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Originally Posted by bitkahuna
should have got a gt-r. i keed i keed.

if I got the gt-r i would be complaining about my blown tranny right now :P
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Old Nov 4, 2009 | 09:28 AM
  #54  
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Originally Posted by biggie27
if I got the gt-r i would be complaining about my blown tranny right now :P
hahaha touche

but time to switch to LFA if R8 replacement does not pan out to your likings
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Old Nov 4, 2009 | 11:06 AM
  #55  
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But the LFA cost almost 3 times as much as the R8 V10.
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Old Nov 4, 2009 | 12:04 PM
  #56  
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Originally Posted by The G Man
But the LFA cost almost 3 times as much as the R8 V10.
And performs about the same.
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Old Nov 4, 2009 | 12:05 PM
  #57  
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Originally Posted by FisforFast
And performs about the same.
If you can provide a link with a comparison to somehow back up your claims, I would be astounded. Can the R10 top 200 mph for instance?
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Old Nov 4, 2009 | 12:16 PM
  #58  
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Originally Posted by 1SICKLEX
If you can provide a link with a comparison to somehow back up your claims, I would be astounded. Can the R10 top 200 mph for instance?
Lexus is claiming the LFA being capable do to 0-60 in 3.6 seconds and a reported top speed of 202 mph, but there are no official times right now. The R8 V10 does 0-60 in 3.9 seconds and has a top speed of 196 mph.

That's close enough for me.

http://ww2.lexus-lfa.com/index.html
http://www.audi.ca/ca/brand/fr/model...container=page

Last edited by FisforFast; Nov 4, 2009 at 12:20 PM.
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Old Nov 4, 2009 | 12:17 PM
  #59  
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I'm not stating this as fact but if the LFA could keep you from transplanting several engines and prevent you from making the dealer buy the car back and all of that other hassle, I'm sure somebody in this world could see the value in that.
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Old Nov 4, 2009 | 12:17 PM
  #60  
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Indeed it definitely sounds like a common problem for the 4.2L FSI engine. In hindsight, Toyota's D4-S system which is a combination of port and direct injection is a very good idea, as it effectively prevents carbon or oil build-up in the valves.

Originally Posted by FisforFast
And performs about the same.
May I ask where you got your crystal ball from, that can predict the future ?

Please don't list paper specs, as those do not indicate *real-world* performance.
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