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De-carrbonizing 997 engine.

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Old 10-25-2019 | 07:21 PM
  #16  
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Originally Posted by vern1
Henry its apparent from one of the other posts that you like to work on your car and replace parts that dont need to be replaced (brakes/clutch etc) but you seem to be creating another issue thats not an issue. Several people have asked why you want to do this but you havent answered the question. Your Porsche is not a BMW. Can you elaborate?

Yeah, I know, I enjoy working on it. Have to control myself here, or get some help from a shrink :>)
Old 10-25-2019 | 07:30 PM
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Nothing wrong with enjoying working on your car but I think people were curious why you think you have a carbon issue

Replacing parts may be cheaper than a shrink
Old 10-25-2019 | 10:38 PM
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do an Italian De Carboning procedure. I do it a lot, usually up ACH, or just blasting on the freeway. Cleans it right out!!
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Old 10-26-2019 | 07:47 AM
  #19  
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Henry, before every oil change, run a full tank of fuel treated with the Chevron Fuel System Cleaner. Refuel. Then, do your oil change.
Old 10-26-2019 | 05:27 PM
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Henry, you need to buy a BMW so you have something to work on that actually needs it! You can buy a nice previous gen 335i and have all sorts of fun with upgrades and such. I just did a new inter-cooler, down pipe and charge pipe. I wanted to do walnut blast but told it didn't need it for another 20k - 30k miles. Oh well!
Old 10-26-2019 | 07:13 PM
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Originally Posted by Balr14
Henry, you need to buy a BMW so you have something to work on that actually needs it! You can buy a nice previous gen 335i and have all sorts of fun with upgrades and such. I just did a new inter-cooler, down pipe and charge pipe. I wanted to do walnut blast but told it didn't need it for another 20k - 30k miles. Oh well!
My DD is a BMW 328I. BMW's older generation were very pleasant to work on. Their newer and current cars are a real pain to work on. Pop the hood and everything under it is plastic and it will break if you so much as look at it, let alone work on it. I had a BMW E30, back in ions and that was a weekend mechanics dream. I should have kept it, rather than donated it for tax write-off after accumulating over 1/2 million miles. Luckily Porsches are still great cars and a joy to work on even though parts are more expensive. BMW as well as Mercedes are now disposable cars and their resale value reflect that.
Old 10-26-2019 | 07:17 PM
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Originally Posted by LexVan
Henry, before every oil change, run a full tank of fuel treated with the Chevron Fuel System Cleaner. Refuel. Then, do your oil change.
Good suggestion. Actually I'm currently using it. Normally buy a 6-pack from Costco real cheap.
Old 10-27-2019 | 10:17 PM
  #23  
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Put some good fuel in it and get it going on the highway for a good run ...There done !!
Old 10-27-2019 | 10:28 PM
  #24  
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I think this is what you are look for. BG GDI Fuel/Air Induction System for removal of carbon buildup.

Old 10-28-2019 | 01:12 PM
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Originally Posted by HenryPcar
My DD is a BMW 328I. BMW's older generation were very pleasant to work on. Their newer and current cars are a real pain to work on. Pop the hood and everything under it is plastic and it will break if you so much as look at it, let alone work on it. I had a BMW E30, back in ions and that was a weekend mechanics dream. I should have kept it, rather than donated it for tax write-off after accumulating over 1/2 million miles. Luckily Porsches are still great cars and a joy to work on even though parts are more expensive. BMW as well as Mercedes are now disposable cars and their resale value reflect that.
Current Porsches are apparently also a pain to work on compared to the 997's engine bay accessibility.
Old 10-29-2019 | 03:27 PM
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And by the way, here it is, and it is a sticky, so I don't know why some would say it is a never heard of problem...… https://rennlist.com/forums/997-foru...oil-usage.html
Old 10-29-2019 | 03:40 PM
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Originally Posted by Steph1
And by the way, here it is, and it is a sticky, so I don't know why some would say it is a never heard of problem...… https://rennlist.com/forums/997-foru...oil-usage.html
Did you read through this thread? The jist of it is that carbon buildup on 9A1 motors is a non-issue. Not sure why it was ever stickied.
Old 10-29-2019 | 06:36 PM
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Originally Posted by ejabour
Did you read through this thread? The jist of it is that carbon buildup on 9A1 motors is a non-issue. Not sure why it was ever stickied.

Honestly, no ! I just knew that this subject was raised before, So when I saw it as a sticky, I just shared it without going through it. So if it is a non-issue as you say, maybe it shouldn't be a sticky.
Old 11-27-2019 | 10:35 AM
  #29  
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Yes, cleaning is useful, but not required @100k miles. Buildup at valve rim edge is (in my opinion) significant if you want optimum power and smoothness.
Intake treatments do not work (I tired a few).
Walnut blast is what I found to work.
3 photos , before, mid cleaning, after.
Intakes removed, engine in car (987.2).


Old 11-27-2019 | 10:49 AM
  #30  
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Originally Posted by LexVan
Henry, before every oil change, run a full tank of fuel treated with the Chevron Fuel System Cleaner. Refuel. Then, do your oil change.
I do this too. Plus I had some heavy Italian redlining in there too. Does it do anything? I dunno... feels good though.

Peace
Bruce in Philly


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