CARBON build-up in engines
08-26-2018, 03:57 PM
#16
Rennlist Member
My daily driver, a Golf R, is another good example. Here in North America, VW screws us and we only get direct injection. In Europe, they use direct *and* port injection, thus, preventing the carbon build-up.
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rnl (04-12-2020)
08-26-2018, 07:35 PM
#18
Didn’t Porsche move the injector to the top of the cylinder (next to the spark plug) on the 991.2 motors? Interested to know if they found a different way to keep the intake valves clean with the injector being moved.
Side note on the walnut blasting from the BMW world, there are a whole lot of people that had to walnut blast the valves on N54 powered BMWs.
Side note on the walnut blasting from the BMW world, there are a whole lot of people that had to walnut blast the valves on N54 powered BMWs.
08-26-2018, 08:38 PM
#19
I was on the Audi World Forum a while back and I discovered they also do the same thing in Europe. The topic of discussion was the Audi A4 and how in Europe they have port and direct-injection in it Why do we not get that in the USA with these brands? The only brand I know in America that does port and direct-injection is Toyota/Lexus. Maybe has something to do with emissions but I'm wondering what it is.
08-26-2018, 10:29 PM
#20
Rennlist Member
I was on the Audi World Forum a while back and I discovered they also do the same thing in Europe. The topic of discussion was the Audi A4 and how in Europe they have port and direct-injection in it Why do we not get that in the USA with these brands? The only brand I know in America that does port and direct-injection is Toyota/Lexus. Maybe has something to do with emissions but I'm wondering what it is.
08-27-2018, 08:29 AM
#22
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Cars with turbos have more issues normally.
If your car consumes a lot of oil, you better check it temporary or flush the engine but flushing can be very dangerous rarely break the engine so talk to your mechanic will be better than DIY.
I have F10 M5 too and it asks me to add oil in every 2000-3000km.
Normally this is caused by not perfect pitch and diameter between the cylinder and the piston but I talked to many mechanics and they all said M5 are designed to burn oil in order to make it less oil change and run smoothly. But still, BMW engines especially M5 are known for misfiring for a common issue.
It’s not like I don’t believe what BMW is trying to do but so many cars these days are not designed for a long life running engine.
If your car consumes a lot of oil, you better check it temporary or flush the engine but flushing can be very dangerous rarely break the engine so talk to your mechanic will be better than DIY.
I have F10 M5 too and it asks me to add oil in every 2000-3000km.
Normally this is caused by not perfect pitch and diameter between the cylinder and the piston but I talked to many mechanics and they all said M5 are designed to burn oil in order to make it less oil change and run smoothly. But still, BMW engines especially M5 are known for misfiring for a common issue.
It’s not like I don’t believe what BMW is trying to do but so many cars these days are not designed for a long life running engine.
08-27-2018, 12:02 PM
#23
Rennlist Member
i have a 2012 Audi A6 3.0T with almost 90k miles on it. so far no issues yet with carbon buildup. I think it mostly affect the 2.0T engines (and the RS4/R8 engine V-8)
08-27-2018, 12:29 PM
#24
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I also recently traded in a 2012 A6 with 3.0T engine at 138,000 miles. That engine ran flawlessly for every mile. This is clearly a problem that is not destined to happen in all direct injected engines. Certain engine designs are prone, others not all all.
08-27-2018, 04:16 PM
#26
I know many of us with Sport Chrono tend to warm our cars up in "normal" and then switch to Sport to keep oil temps down. I wonder if this will haunt us down the road- in other words does a higher temperature engine build up carbon at a smaller rate than an engine that runs ~200 degrees?
08-27-2018, 04:39 PM
#27
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06-26-2019, 04:27 PM
#28
Hi, newcomer here. Rather than start a new thread, I searched to find this thread to ask a fuel related question.
I just purchased a CPO 2017 991.2 base Carrera with 19k miles. It had its 20k service in April at Porsche of South Shore in Long Island NY (where I bought it before driving it back to Tampa.). I currently have no issues and it runs great.
Relative to fuel, I’d been using my local Costco Premium for my departed 2014 Cayman S. No issues to report.
I’ve heard the recommendation of dumping in Techroline concentrate before an Oil Change, and did that with my Cayman.
Generally speaking, can I follow the same plan with the 911? (Costco gas / techroline prior to OCI)?
My thoughts are Costco is now ‘Top Tier’ (for what it’s worth) and the pumps are busy (fresh gas hopefully) and the flow rates are good (filters maintained hopefully). Certainly the price per gallon is about the best in the area.
Or should I seek out a local Chevron or Shell V Power and pay the premium?
I’m likely over thinking this and I should just fill up at Costco and worry more about when I can attend my first PCA DE.
Thank you, I appreciate your thoughts.
rich
I just purchased a CPO 2017 991.2 base Carrera with 19k miles. It had its 20k service in April at Porsche of South Shore in Long Island NY (where I bought it before driving it back to Tampa.). I currently have no issues and it runs great.
Relative to fuel, I’d been using my local Costco Premium for my departed 2014 Cayman S. No issues to report.
I’ve heard the recommendation of dumping in Techroline concentrate before an Oil Change, and did that with my Cayman.
Generally speaking, can I follow the same plan with the 911? (Costco gas / techroline prior to OCI)?
My thoughts are Costco is now ‘Top Tier’ (for what it’s worth) and the pumps are busy (fresh gas hopefully) and the flow rates are good (filters maintained hopefully). Certainly the price per gallon is about the best in the area.
Or should I seek out a local Chevron or Shell V Power and pay the premium?
I’m likely over thinking this and I should just fill up at Costco and worry more about when I can attend my first PCA DE.
Thank you, I appreciate your thoughts.
rich
06-26-2019, 04:35 PM
#29
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The prevailing recommendation now is Shell V Power. Buy from a busy station.
I use the Techron Fuel System Cleaner 400 miles before EVERY oil change.
I use the Techron Fuel System Cleaner 400 miles before EVERY oil change.
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Rich_Jenkins (06-26-2019)
06-26-2019, 04:45 PM
#30
Didn’t Porsche move the injector to the top of the cylinder (next to the spark plug) on the 991.2 motors? Interested to know if they found a different way to keep the intake valves clean with the injector being moved.
Side note on the walnut blasting from the BMW world, there are a whole lot of people that had to walnut blast the valves on N54 powered BMWs.
Side note on the walnut blasting from the BMW world, there are a whole lot of people that had to walnut blast the valves on N54 powered BMWs.