folié a déux....

oneintheory · 08-06-2009, 08:20 PM

took my car back to BMW yesterday for another HPFP replacement and a tranny issue. got a call today saying I had carbon buildup on my intake valves (again). so they're going to send off the results of their testing to BMWNA to see what they say.

It took a week and a half for them to fix this last time. I am not a happy camper.

amiller212 · 08-06-2009, 09:16 PM

That sucks. You've already had a HPFP replaced?

oneintheory · 08-06-2009, 09:17 PM

Quote:

Originally Posted by amiller212

That sucks. You've already had a HPFP replaced?

HPFP replaced, injectors replaced, spark plugs replaced, intake cleaned out (de-carboned), new valve cover....

romak47 · 08-06-2009, 09:29 PM

Quote:

Originally Posted by oneintheory

HPFP replaced, injectors replaced, spark plugs replaced, intake cleaned out (de-carboned), new valve cover....

Dang. I wonder whats causing your carbon buildup issues? possible leak from the turbos putting some crap back into the intake? Wonder if a oil catch can or so would fix your problem? How many miles on your car and what spec and brand oil you using? Hope this doesnt ever happen to my car.. How was BMW as far as replacing parts and paying for it? They payed labor too?

oneintheory · 08-06-2009, 09:35 PM

Quote:

Originally Posted by romak47

Dang. I wonder whats causing your carbon buildup issues? possible leak from the turbos putting some crap back into the intake? Wonder if a oil catch can or so would fix your problem? How many miles on your car and what spec and brand oil you using? Hope this doesnt ever happen to my car.. How was BMW as far as replacing parts and paying for it? They payed labor too?

OCC would cause warranty issues in a situation like this. 24,000 miles and BMW oil changes. Usually use 92 octane lately, but used to use Exxon or Shell 93 always.

Everything has been covered so far.

frimmelnojerz · 08-06-2009, 10:27 PM

direct injection causes lots of carbon build up.

jeremyc74 · 08-06-2009, 10:44 PM

Quote:

Originally Posted by frimmelnojerz

direct injection causes lots of carbon build up.

Why? I'm not saying it doesn't happen, but I'd like to know what the mechanics behind it are.

Carbon buildup on the intake valves would seem to me to be decreased on DI engines.

I'm thinking he must have something wrong with the crankcase ventilation or emissions system.

Formel1 · 08-07-2009, 07:28 AM

Sounds like you're not driving it hard enough...

....JK...keep us posted on the result....my old 55AMG was notorious for carbon build up if you didn't get on it a lot....so, if I must....

My135 · 08-07-2009, 09:05 AM

What fuel that you are using? Did they give you a rental car? Please keep us posted and good luck. Thanks.

oneintheory · 08-07-2009, 05:31 PM

Going to pick up a loaner in a bit. Using Shell/Exxon 93 and some Wawa 92 on occasion.

Got an update from the dealership today, BMWNA said to remove cylinder head and valves and report back to them.

frimmelnojerz · 08-07-2009, 11:25 PM

Quote:

Originally Posted by jeremyc74

Why? I'm not saying it doesn't happen, but I'd like to know what the mechanics behind it are.

Carbon buildup on the intake valves would seem to me to be decreased on DI engines.

I'm thinking he must have something wrong with the crankcase ventilation or emissions system.

it's for a bunch of contributing factors but i know with VAG cars its due to the direct injected engines have no way of clearing off deposits. normal port injected engines wash away any deposits that form with the fuel spray.

jeremyc74 · 08-08-2009, 02:11 AM

Quote:

Originally Posted by frimmelnojerz

it's for a bunch of contributing factors but i know with VAG cars its due to the direct injected engines have no way of clearing off deposits. normal port injected engines wash away any deposits that form with the fuel spray.

How do the deposits get there in the first place though?

ghjkser · 08-08-2009, 06:02 PM

you get carbon build up and deposits from gasoline. with direct injection the gas does not touch the back of the valves and cause build up. its faulty crankcase ventilation, catch can would help a lot. also stop driving like a puss

oneintheory · 08-08-2009, 08:09 PM

Quote:

Originally Posted by ghjkser

also stop driving like a puss

what an intelligent response. i can only hope you were joking.

my car gets wrung out on a regular basis, if anyone wants to say that timid driving is the cause of my problems.

SJ · 08-26-2009, 11:18 PM

Aren't most high-end engines direct injection these days? Wouldn't this become some kind of industry bug-a-boo if the carbon buildup was something intrinsic to the DI design?

Is the carbon buildup linked to the HPFP problem? Or are these two totally independent disasters? (I'm not a mechanic, although I do play one on TV!)

I'm really curious, and concerned, about this as I'm within a CH of ordering my first 135i, which would also be my first BMW.
Any insights appreciated.

jibaholic101 · 08-27-2009, 12:11 AM

i blame it on this bullshit ethanol as far as the buildup, sorry about your other problems

Si-M240i · 08-27-2009, 01:31 AM

Quote:

Originally Posted by oneintheory

OCC would cause warranty issues in a situation like this. 24,000 miles and BMW oil changes. Usually use 92 octane lately, but used to use Exxon or Shell 93 always.

Everything has been covered so far.

Why would an OCC cause warranty issues as all it deos is remove oil vapor entering the intercooler and all parts therafter.

HondaGoneRogue · 08-27-2009, 02:25 AM

Because BMW didn't make any $$ off of it.

jeremyc74 · 08-27-2009, 08:02 AM

Quote:

Originally Posted by SJ

Aren't most high-end engines direct injection these days? .

No, not really. The majority of the cars BMW sells don't have DI. Even the M3, M5 and M6 aren't DI. As a matter of fact, as far as I know BMW is only using it on their turbocharged engines right now.

GM has a few DI engines available that aren't turbocharged, but most of the stuff they sell isn't either, and the same goes for the other major manufacturers. Off the top of my head, I'm not sure if Toyota has a DI engine in production at all.

escobar929 · 08-27-2009, 12:12 PM

man, that sux

Robert · 08-27-2009, 12:46 PM

What lead them to discover the carbon build up. I imagine they would have to open the engine up to see that and mechanics typical don't that for fuel pump replacement?

Victory Road · 08-27-2009, 01:56 PM

Quote:

Originally Posted by jibaholic101

i blame it on this bullshit ethanol as far as the buildup, sorry about your other problems

actually ethanol is much cleaner and would help clean the buildup

08-06-2009, 08:20 PM	#1
oneintheory no longer a BMW owner 152 Rep 1,463 Posts Drives: 2011 Ford Edge Sport Join Date: Jan 2009 Location: Suffolk/Chesapeake, VA iTrader: (0)	folié a déux.... took my car back to BMW yesterday for another HPFP replacement and a tranny issue. got a call today saying I had carbon buildup on my intake valves (again). so they're going to send off the results of their testing to BMWNA to see what they say. It took a week and a half for them to fix this last time. I am not a happy camper.
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08-06-2009, 09:16 PM	#2
amiller212 Private First Class 1 Rep 118 Posts Drives: Le Mans Blue 135i Join Date: Jun 2009 Location: Mississauga iTrader: (0)	That sucks. You've already had a HPFP replaced?
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08-06-2009, 10:27 PM	#6
frimmelnojerz Captain 23 Rep 692 Posts Drives: Montego blue 135i Join Date: Jun 2008 Location: Bayonne, NJ iTrader: (0)	direct injection causes lots of carbon build up. __________________ 08' 135 in much need of some TLC. But after that... Watch out. AA/Berk/ER/UR/CP-e/Snow/ESS
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08-07-2009, 07:28 AM	#8
Formel1 Second Lieutenant 47 Rep 257 Posts Drives: 2009 BMW 135i Join Date: Jul 2009 Location: Winter Park, FL iTrader: (1)	Sounds like you're not driving it hard enough.......JK...keep us posted on the result....my old 55AMG was notorious for carbon build up if you didn't get on it a lot....so, if I must....
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08-07-2009, 09:05 AM	#9
My135 Lieutenant Colonel 85 Rep 1,609 Posts Drives: Join Date: Mar 2008 iTrader: (0)	What fuel that you are using? Did they give you a rental car? Please keep us posted and good luck. Thanks. __________________ 7/08 135 Coupe, Crimson Red, 6 SP, Sport, Taupe Lette/Aluminum. Performance Mods: JB4 on Map 5, BMS DP Fix V3, Injen polished intake, AR Catless DP, Maddad resonated mid-pipes, aFe exhaust polished tips, ST Suspension Coil Over and Hotchkis front sway bar. Others: BMS OCC, BT Scanner, Mud Flap. Next Mods: AA Front Strut Brace.
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08-07-2009, 05:31 PM	#10
oneintheory no longer a BMW owner 152 Rep 1,463 Posts Drives: 2011 Ford Edge Sport Join Date: Jan 2009 Location: Suffolk/Chesapeake, VA iTrader: (0)	Going to pick up a loaner in a bit. Using Shell/Exxon 93 and some Wawa 92 on occasion. Got an update from the dealership today, BMWNA said to remove cylinder head and valves and report back to them.
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08-08-2009, 06:02 PM	#13
ghjkser Enlisted Member 0 Rep 36 Posts Drives: 135 Join Date: Aug 2009 Location: los angeles iTrader: (0)	you get carbon build up and deposits from gasoline. with direct injection the gas does not touch the back of the valves and cause build up. its faulty crankcase ventilation, catch can would help a lot. also stop driving like a puss
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08-26-2009, 11:18 PM	#15
SJ Private 20 Rep 83 Posts Drives: none yet Join Date: Aug 2009 Location: NC iTrader: (0)	Aren't most high-end engines direct injection these days? Wouldn't this become some kind of industry bug-a-boo if the carbon buildup was something intrinsic to the DI design? Is the carbon buildup linked to the HPFP problem? Or are these two totally independent disasters? (I'm not a mechanic, although I do play one on TV!) I'm really curious, and concerned, about this as I'm within a CH of ordering my first 135i, which would also be my first BMW. Any insights appreciated.
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08-27-2009, 12:11 AM	#16
jibaholic101 Brigadier General 160 Rep 3,496 Posts Drives: women wild Join Date: Nov 2008 Location: Charleston, SC iTrader: (0)	i blame it on this bullshit ethanol as far as the buildup, sorry about your other problems __________________ some italian, german, and japanese ones; and on order more of the same
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08-27-2009, 02:25 AM	#18
HondaGoneRogue They like my Swag... 433 Rep 3,762 Posts Drives: 15 GSM 435i GC Join Date: Aug 2008 Location: South Dakota iTrader: (4) Garage List 2015 435i Gran Coupe [0.00]	Because BMW didn't make any $$ off of it. __________________ 2015 435i Gran Coupe - Current 2008 AW 135i - Sold
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08-27-2009, 12:12 PM	#20
escobar929 Brigadier General 154 Rep 4,528 Posts Drives: M2 CS Join Date: Aug 2009 Location: Hollywood, FL iTrader: (14) Garage List 2020 M2 CS [10.00] 2020 M240i [0.00]	man, that sux
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08-27-2009, 12:46 PM	#21
Robert Major General 417 Rep 6,968 Posts Drives: 135i -> is350 -> Tesla M3 perf Join Date: Aug 2005 Location: Socal iTrader: (1)	What lead them to discover the carbon build up. I imagine they would have to open the engine up to see that and mechanics typical don't that for fuel pump replacement?
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