Bimmerfest - BMW Forums

Bimmerfest - BMW Forums (http://www.bimmerfest.com/forums/index.php)
-   E90/E91/E92/E93 (2006 - 2013) (http://www.bimmerfest.com/forums/forumdisplay.php?f=99)
-   -   1390000 mile intake valve. (http://www.bimmerfest.com/forums/showthread.php?t=662170)

Leekay07 12-04-2012 01:05 PM

1390000 mile intake valve.
 
1 Attachment(s)
Cal was spot on

Sent from my SAMSUNG-SGH-I747 using Bimmer App

Zooks527 12-04-2012 02:02 PM

Well, what the hell do you expect after nearly 1.4 million miles ??? What do you do, drive 12 hrs/day, every day?

I mean, damn, dude, let the poor thing rest once in a while ! Still, it bodes well for the longevity of the cars.

MP3_E46 12-04-2012 02:49 PM

Quote:

Originally Posted by Zooks527 (Post 7230738)
Well, what the hell do you expect after nearly 1.4 million miles ??? What do you do, drive 12 hrs/day, every day?

I mean, damn, dude, let the poor thing rest once in a while ! Still, it bodes well for the longevity of the cars.

Lol!

OP, let us know how you clean it. Did you run Techron through before any oil changes?

ctuna 12-04-2012 02:55 PM

Running techron on a DI car won't help
 
Running techron on a DI car won't help as no fuel passes over the valves.
Past time for the Walnut Blast.

The DI cars have a design flaw the causes carbon build up over the valves.
No fuel passes over the valves. This is not unique to BMW.

I have a feeling that figure is off by an order of magnitude.

DSXMachina 12-04-2012 03:17 PM

Quote:

Originally Posted by ctuna (Post 7230839)
Running techron on a DI car won't help as no fuel passes over the valves.
Past time for the Walnut Blast.

The DI cars have a design flaw the causes carbon build up over the valves.
No fuel passes over the valves. This is not unique to BMW.

I have a feeling that figure is off by an order of magnitude.

10.4 million miles???
For anyone who might not know, the valve is at the bottom end of that 'stem' you see coming down from the top. Only a portion of it is visible. The worst accretion is on the intake roof where the valve stem enters the cylinder head. The pic would have been taken after the intake manifold was removed. If a borescope is available you can see the same area without removing the intake manifold.

MP3_E46 12-04-2012 03:46 PM

Quote:

Originally Posted by ctuna (Post 7230839)
The DI cars have a design flaw the causes carbon build up over the valves.
No fuel passes over the valves. This is not unique to BMW.

Hmm.. I'd not thought of that before. So this is an air intake valve on a DI car? Presumably the carbon is sucked in from the combustion chamber and builds up over time?

This is the 335i with ~138K miles having lots of decent size repair bills right?

Zooks527 12-04-2012 03:48 PM

Quote:

Originally Posted by MP3_E46 (Post 7230927)
Hmm.. I'd not thought of that before. So this is an air intake valve on a DI car? Presumably the carbon is sucked in from the combustion chamber and builds up over time?

Reburn from the PCV line. The crankcase vents into the intake with oil vapor in it. Most of the vapor is burned in the combustion cycle, but some carbonizes on contact with the hot metal around the valve. Another bit of anti-pollution joy.

In a Port Injection system, the fuel contacts the valve stem and helps keep it clean. In a Direct Injection system, you don't get this effect.


Extra credit: Complete this jingle: "We're the rocker arm assembly, assembly, assembly; we're the rocker arm assembly, and ...."

MP3_E46 12-04-2012 04:00 PM

Quote:

Originally Posted by Zooks527 (Post 7230932)
Reburn from the PCV line. The crankcase vents into the intake with oil vapor in it. Most of the vapor is burned in the combustion cycle, but some carbonizes on contact with the hot metal around the valve.

So seafoam hooked to the PCV return once in a while should help?

Leekay07 12-04-2012 04:01 PM

its 139,000 and yes mega bills. The dealer tried to bend me over this week Monday they called me telling me I would have to pay them $400 to inspect the valves and that its normally 10hrs on average to clean the valves and they have to rent the equipment from BMW and bill me for it. Umm can you say F U. I said I'll just take the car and do it myself. I bought a set of gaskets and set about pulling my car to bits. Took me an hour to pull the thing to the intake and its taking 2hrs to hand clean each valve inlet.

MP3_E46 12-04-2012 04:03 PM

Quote:

Originally Posted by Leekay07 (Post 7230964)
its 139,000 and yes mega bills. The dealer tried to bend me over this week Monday they called me telling me I would have to pay them $400 to inspect the valves and that its normally 10hrs on average to clean the valves and they have to rent the equipment from BMW and bill me for it. Umm can you say F U. I said I'll just take the car and do it myself. I bought a set of gaskets and set about pulling my car to bits. Took me an hour to pull the thing to the intake and its taking 2hrs to hand clean each valve inlet.

Respect. Hope this cures the car.

Leekay07 12-04-2012 04:06 PM

I want to kick myself because its pretty simple to work on. I am sick of the dealer and I`ll not be returning in any kind of hurry. They billed me $300 to replace a functioning coil pack that they diagnosed as faulty.

MP3_E46 12-04-2012 04:12 PM

Quote:

Originally Posted by Leekay07 (Post 7230974)
I want to kick myself because its pretty simple to work on. I am sick of the dealer and I`ll not be returning in any kind of hurry. They billed me $300 to replace a functioning coil pack that they diagnosed as faulty.

Cripes, they are ~$60 and a doddle to replace on most cars

ctuna 12-04-2012 05:27 PM

Fyi
 
http://www.e90post.com/forums/showth...valve+cleaning

CALWATERBOY 12-04-2012 05:35 PM

Quote:

Originally Posted by Leekay07 (Post 7230641)
Cal was spot on


Had a hunch....nice t'know I can find an acorn once in a while....

Pretty good beer too, made by a friend li'l bit North:

http://img10.imageshack.us/img10/4728/blindpig.gif

MP3_E46 12-04-2012 05:39 PM

Is this thread correct that it's much less of an issue on the 328 engine (and my Prius etc)

Update: Apparently the Gen III Prius does not use DI; pretty suprising

DSXMachina 12-04-2012 05:41 PM

Quote:

Originally Posted by Leekay07 (Post 7230641)
Cal was spot on

Sent from my SAMSUNG-SGH-I747 using Bimmer App

Leekay, what were your oil change intervals?

andrew b 12-04-2012 06:21 PM

So, since much of that is from the PCV, an oil catch can helps as a preventative mod, right?

I didn't think my OCC was doing anything, since there was only just a touch of oil on the end of the "dipstick" the can has (it's a BSH). Was mucking around on something else and decided to pull it off to empty it and see.

It had about an ounce of oil in it after the 1000 miles. More than I thought was there. FWIW, my car has not required oil between changes (so far).

Leekay07 12-04-2012 06:47 PM

My oil change was 7500.

CALWATERBOY 12-04-2012 07:13 PM

Quote:

Originally Posted by Leekay07 (Post 7230964)
its 139,000 and yes mega bills. The dealer tried to bend me over this week Monday they called me telling me I would have to pay them $400 to inspect the valves and that its normally 10hrs on average to clean the valves and they have to rent the equipment from BMW and bill me for it. Umm can you say F U. I said I'll just take the car and do it myself. I bought a set of gaskets and set about pulling my car to bits. Took me an hour to pull the thing to the intake and its taking 2hrs to hand clean each valve inlet.

[1] Yup....if they R&R the head. Is it too much?

[2] I bought the BMW parts for, what was it, $50? Tischer I think.

Leekay07 12-04-2012 07:18 PM

I know they are full of crap. I also turned in the stupid questionnaire today. I did asked for my money back for the coil pack they replaced without even so much as trouble shooting. Not till I brought the car back that afternoon did they bother to try the pack in another cylinder before deciding it was something else. If it was BMW they did this too BMW would have laughed at them. But no they have my money so hard luck. They gave me some crap about it should have been replaced when the plugs and injectors where so no refund.. LOL

I am thinking about filing a claim with my cc about this lot. 800 in parts and 2200 in labor and its still doing the same thing it did when I took it.

galahad05 12-04-2012 07:18 PM

What is head R&R?

CALWATERBOY 12-04-2012 07:26 PM

Quote:

Originally Posted by galahad05 (Post 7231317)
What is head R&R?

Remove and Replace the cyl head [with valves] for valve bench cleaning. Might be useful if one were to port the valves, check spray patterns, etc. Excellent for inspection - there's some validity to it, but it's thin ice.

Leekay07 12-05-2012 03:05 AM

No they was not removing it. I`ll post the paper work later from the two BMW shops.

MP3_E46 12-05-2012 05:11 AM

Quote:

Originally Posted by Leekay07 (Post 7231316)
I know they are full of crap. I also turned in the stupid questionnaire today. I did asked for my money back for the coil pack they replaced without even so much as trouble shooting. Not till I brought the car back that afternoon did they bother to try the pack in another cylinder before deciding it was something else. If it was BMW they did this too BMW would have laughed at them. But no they have my money so hard luck. They gave me some crap about it should have been replaced when the plugs and injectors where so no refund.. LOL

I am thinking about filing a claim with my cc about this lot. 800 in parts and 2200 in labor and its still doing the same thing it did when I took it.

$3K and not have anything fixed is clearly ridiculous for a mass production car. That's Ferrari owner bills not a run of the mill BMW.

Main issue if probably taking it the dealer. They are used to warranty work and working on cars just out of warranty. It's doubtful many dealers see many cars with much over 80K miles as after the first repair bill most owners find an independent garage.

Braumin 12-05-2012 06:35 AM

Back when I was an automotive tech, we used to have an intake cleaning kit that we could run on a car. You mounted a sprayer over the throttle body and injected over about 20 - 30 minutes a cleaning solution mist while the engine was running. It was similar to this: http://www.autogeek.net/3m-fuel-system-kit-08963.html Similar but it was a professional rig and not this hokey spray can. It really did a great job especially with the port fuel injection cars since no fuel would flow through the intake manifold.

Now I don't believe this would clean the valves once they are sufficiently dirty, but does anyone (DSXMachina for instance since he seems to have a lot of knowledge on this subject) know if this would be a good preventative measure? I'd have no problems running this every 30,000km or something. It wasn't overly expensive and was similar in price to a fuel injector cleaning.


All times are GMT -7. The time now is 06:28 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
© 2001-2011 performanceIX, Inc. All Rights Reserved .: guidelines .:. privacy .:. terms