Supposedly this carbon buildup issue is not just my issue

S4to335 · 12-31-2008, 09:56 PM

My dealership removed some of the carbon buildup in my engine..I was supposed to pick up the car from the dealership tonight..but I couldnt make it. I will report my findings after I pick it up again on Friday.

McLuVan · 12-31-2008, 10:28 PM

what the...

Fraggy · 12-31-2008, 10:28 PM

I wonder if thats why my car feels like it lost a step. I got a 335 loaner the other day, non sport and I swear that car seemed faster than mine.

scollins · 12-31-2008, 10:38 PM

Very interesting. What oil change interval are you running?

I've heard of other engines having "sludge" issues (like the Dodge 4.7L V8.....)

vase330 · 01-01-2009, 12:33 AM

Quote:

Originally Posted by S4to335

My dealership removed some of the carbon buildup in my engine..I was supposed to pick up the car from the dealership tonight..but I couldnt make it. I will report my findings after I pick it up again on Friday.

Huh? What Toone are you running? Can you be more specific? Carbon, and how do they remove that?

vase330 · 01-01-2009, 12:35 AM

Quote:

Originally Posted by scollins

Very interesting. What oil change interval are you running?

I've heard of other engines having "sludge" issues (like the Dodge 4.7L V8.....)

Yeah its a Crystler and there is a reason they are going bankrupt. I must say I am not all that surprised.

Jeff335i · 01-01-2009, 10:04 AM

Carbon buildup on the intake valves can be a problem on direct-injection gasoline engines. Since the air-fuel mixture no longer passes over the intake valves the detergent in your gas no longer can keep them clean. Or so I've been told, but it seems plausible to me.

GMWNashville · 01-01-2009, 11:11 AM

that and some people run crappy cheap gas...and even "good" gas half the time isnt even any good..

Ilma · 01-01-2009, 12:07 PM

I saw the same issue develop with the VW/Audi 2.0T FSI platforms which also use direct fuel injection.

The lack of fuel flow through the intake system makes a good case for water/meth injection as a means of keeping things clean.

i2iSTUDIOS · 01-01-2009, 01:26 PM

Quote:

Originally Posted by Ilma

I saw the same issue develop with the VW/Audi 2.0T FSI platforms which also use direct fuel injection.

The lack of fuel flow through the intake system makes a good case for water/meth injection as a means of keeping things clean.

what is this water/meth that you speak of?

Ilma · 01-01-2009, 02:12 PM

It's an aftermaket kit that includes a tank to hold a 50/50 mixture of water and methanol, a separate electric pump and an injector nozzle which attaches preferably just before the throttle body on your intake pipe.

They claim that pumping in the mixture during boost conditions, cools down the hot intake charge and increases the effective octane of your fuel, thus allowing you to advance timing and develop more power.

A side benefit is that methanol dissolves oil residue and the super heated water, steam cleans the intake and combustion chambers.

I haven't tried one yet....but I do have the kit collecting dust in my closet.

Here's a pic of the pump. The kit is manufactured by Snow Performance. You can look them up for more info.

[IMG]

[/IMG]

pander5 · 01-01-2009, 02:51 PM

In addition to the benefits Ilma mentioned, I'm also told water/meth also helps prolong the full life cycle of engine "innards" (valves, pistons, rods etc). I like the idea and am looking into installing a kit myself. I will keep my 07 coupe beyond warranty.

vase330 · 01-01-2009, 02:52 PM

Quote:

Originally Posted by Ilma

It's an aftermaket kit that includes a tank to hold a 50/50 mixture of water and methanol, a separate electric pump and an injector nozzle which attaches preferably just before the throttle body on your intake pipe.

They claim that pumping in the mixture during boost conditions, cools down the hot intake charge and increases the effective octane of your fuel, thus allowing you to advance timing and develop more power.

A side benefit is that methanol dissolves oil residue and the super heated water, steam cleans the intake and combustion chambers.

I haven't tried one yet....but I do have the kit collecting dust in my closet.

Here's a pic of the pump. The kit is manufactured by Snow Performance. You can look them up for more info.

[IMG]

[/IMG]

I don't know man. looks like Warranty void guarantee to me. What other side effects does it have? I don't know so please educate me.

BavarianBullet · 01-01-2009, 04:59 PM

Quote:

Originally Posted by S4to335

My dealership removed some of the carbon buildup in my engine..I was supposed to pick up the car from the dealership tonight..but I couldnt make it. I will report my findings after I pick it up again on Friday.

Thanks for the FYI. Let us know how it goes.

If it's just carbon on the intake valves it sounds like crankcase oil vapor must be slowly depositing it on there. Without fuel perhaps to wash it off as others suggested, it might build up more with DI vs without.

Why was your car in the shop and why did the dealer mention carbon buildup? Were you experiencing power loss or specific engine codes?

thanks

BB

sambonator · 01-01-2009, 06:37 PM

Quote:

Originally Posted by S4to335

My dealership removed some of the carbon buildup in my engine..I was supposed to pick up the car from the dealership tonight..but I couldnt make it. I will report my findings after I pick it up again on Friday.

Was this done under warranty? What symptoms did you have because of the buildup, and how was that diagnosed? Thanks in advance!

mwahlert · 01-01-2009, 07:01 PM

Quote:

Originally Posted by Jeff335i

Carbon buildup on the intake valves can be a problem on direct-injection gasoline engines. Since the air-fuel mixture no longer passes over the intake valves the detergent in your gas no longer can keep them clean. Or so I've been told, but it seems plausible to me.

yes - this has been a problem on the vw 2.0tfsi as well.

S4to335 · 01-01-2009, 08:27 PM

Quote:

Originally Posted by Jeff335i

Carbon buildup on the intake valves can be a problem on direct-injection gasoline engines. Since the air-fuel mixture no longer passes over the intake valves the detergent in your gas no longer can keep them clean. Or so I've been told, but it seems plausible to me.

BINGO...or about what I was told.

S4to335 · 01-01-2009, 08:30 PM

Quote:

Originally Posted by BavarianBullet

Thanks for the FYI. Let us know how it goes.

If it's just carbon on the intake valves it sounds like crankcase oil vapor must be slowly depositing it on there. Without fuel perhaps to wash it off as others suggested, it might build up more with DI vs without.

Why was your car in the shop and why did the dealer mention carbon buildup? Were you experiencing power loss or specific engine codes?

thanks

BB

I am president of the misfire/rough idle club...that is what they were diagnosing..when they mentioned the carbon buildup. Again, I have had FOUR High Pressure fuel pumps, one fuel filter, two injectors, two coilpacks, and one spark plug replaced..not to mention my turbo wastegates.

Cloud9blue · 01-01-2009, 09:17 PM

Quote:

Originally Posted by Ilma

It's an aftermaket kit that includes a tank to hold a 50/50 mixture of water and methanol, a separate electric pump and an injector nozzle which attaches preferably just before the throttle body on your intake pipe.

They claim that pumping in the mixture during boost conditions, cools down the hot intake charge and increases the effective octane of your fuel, thus allowing you to advance timing and develop more power.

A side benefit is that methanol dissolves oil residue and the super heated water, steam cleans the intake and combustion chambers.

I haven't tried one yet....but I do have the kit collecting dust in my closet.

Here's a pic of the pump. The kit is manufactured by Snow Performance. You can look them up for more info.

[IMG]

[/IMG]

lol, they use those stuff on bmw build fighter engine back in WWII.

Ilma · 01-01-2009, 10:33 PM

Quote:

Originally Posted by vase330

I don't know man. looks like Warranty void guarantee to me. What other side effects does it have? I don't know so please educate me.

Oh ya....that mod would be very visible and not easily removed either.

Only for the hardcore crowd because of this.

However....there do seem to be a lot of benefits.

Anyways...here is a link to an install for those who want some "education".

http://www.e90post.com/forums/showth...ght=water/meth

Ilma · 01-01-2009, 10:34 PM

Quote:

Originally Posted by AlpineCloud9

lol, they use those stuff on bmw build fighter engine back in WWII.

That made me chuckle...lol.

But in a perfect world given the choice between a meth kit and an intercooler....i think i would go with the meth kit.

It's just a little too impractical for me at this stage of the game.

But the VW and Subaru crowd have been doing these for a while now.

Bubbles · 01-02-2009, 07:46 AM

Quote:

Originally Posted by S4to335

I am president of the misfire/rough idle club...that is what they were diagnosing..when they mentioned the carbon buildup. Again, I have had FOUR High Pressure fuel pumps, one fuel filter, two injectors, two coilpacks, and one spark plug replaced..not to mention my turbo wastegates.

S4to335

I am very interested to hear your post-repair impressions. Lately, my car is Dr. Jekyll and Mr. Hyde. Good days, the car revs and revs with instantaneous throttle response and torque. Bad days, missing torque, throttle is less than responsive. I know I am not alone with this issue having received similar feedback from Piggy and stock owners.

I just don't get, she wants to "play" some days and other days she is "emotional." What gives? Are BMW's engine protection methods (See Dinan Whitepaper) too intrusive?

12-31-2008, 09:56 PM	#1
S4to335 Brigadier General 439 Rep 4,380 Posts Drives: 2014 Audi A4 / 91 Track Miata Join Date: Jan 2007 Location: San Jose, CA iTrader: (5) Garage List 2007 BMW 335i sedan [8.00]	Supposedly this carbon buildup issue is not just my issue My dealership removed some of the carbon buildup in my engine..I was supposed to pick up the car from the dealership tonight..but I couldnt make it. I will report my findings after I pick it up again on Friday. __________________ Car is now gone .... :-(
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12-31-2008, 10:28 PM	#2
McLuVan Lieutenant General 304 Rep 13,114 Posts Drives: ///M3 Join Date: Jan 2008 Location: Socal~818~ iTrader: (1)	what the...
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12-31-2008, 10:28 PM	#3
Fraggy Brigadier General 193 Rep 3,469 Posts Drives: 2016 M3 Join Date: Jun 2005 Location: San Diego iTrader: (11)	I wonder if thats why my car feels like it lost a step. I got a 335 loaner the other day, non sport and I swear that car seemed faster than mine. __________________ 2016 Alpine White M3 (gone) 2019 Alfa Romeo Guilia (Totaled) 2020 Car-less 😁 (no more) 2020 M340
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12-31-2008, 10:38 PM	#4
scollins Bootleggin' 'n Gunrunnin' 139 Rep 2,372 Posts Drives: 2024 X3 M40i Join Date: May 2007 Location: Renton, WA iTrader: (3)	Very interesting. What oil change interval are you running? I've heard of other engines having "sludge" issues (like the Dodge 4.7L V8.....) __________________ Scott 2024 G01 X3 M40i, Brooklyn Grey Metallic /// 2015 F15 X5 35i, Space Gray Metallic, 99K miles /// 2013 F30 320xi, Mojave Metallic, 112k miles 2019 Ford F450 STX, Oxford White 2013 Ducati Multistrada Touring S, Red
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01-01-2009, 10:04 AM	#7
Jeff335i Private 2 Rep 75 Posts Drives: '07 335i Coupe Join Date: Jun 2008 Location: USA iTrader: (1)	Carbon buildup on the intake valves can be a problem on direct-injection gasoline engines. Since the air-fuel mixture no longer passes over the intake valves the detergent in your gas no longer can keep them clean. Or so I've been told, but it seems plausible to me.
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01-01-2009, 11:11 AM	#8
GMWNashville Colonel 172 Rep 2,373 Posts Drives: 19 G05, 16 F80, 10 E70x5D Join Date: Jan 2008 Location: Nashville, TN iTrader: (2)	that and some people run crappy cheap gas...and even "good" gas half the time isnt even any good..
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01-01-2009, 12:07 PM	#9
Ilma Colonel 185 Rep 2,842 Posts Drives: 2008 135i Join Date: Nov 2008 Location: Mississauga iTrader: (0)	I saw the same issue develop with the VW/Audi 2.0T FSI platforms which also use direct fuel injection. The lack of fuel flow through the intake system makes a good case for water/meth injection as a means of keeping things clean.
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01-01-2009, 02:12 PM	#11
Ilma Colonel 185 Rep 2,842 Posts Drives: 2008 135i Join Date: Nov 2008 Location: Mississauga iTrader: (0)	It's an aftermaket kit that includes a tank to hold a 50/50 mixture of water and methanol, a separate electric pump and an injector nozzle which attaches preferably just before the throttle body on your intake pipe. They claim that pumping in the mixture during boost conditions, cools down the hot intake charge and increases the effective octane of your fuel, thus allowing you to advance timing and develop more power. A side benefit is that methanol dissolves oil residue and the super heated water, steam cleans the intake and combustion chambers. I haven't tried one yet....but I do have the kit collecting dust in my closet. Here's a pic of the pump. The kit is manufactured by Snow Performance. You can look them up for more info. [IMG][/IMG]
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01-01-2009, 02:51 PM	#12
pander5 Special Forces - Discretion is superior 32 Rep 1,011 Posts Drives: 335i Coupe Sapphire Black Join Date: Mar 2006 Location: Tampa, FL iTrader: (0) Garage List 2007 335i Coupe [0.00]	In addition to the benefits Ilma mentioned, I'm also told water/meth also helps prolong the full life cycle of engine "innards" (valves, pistons, rods etc). I like the idea and am looking into installing a kit myself. I will keep my 07 coupe beyond warranty. __________________ M3 + trailer hitch = oxymoron
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