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E90/E91/E92/E93 (2006 - 2013)
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  #1  
Old 12-04-2012, 01:05 PM
Leekay07 Leekay07 is offline
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1390000 mile intake valve.

Cal was spot on

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  #2  
Old 12-04-2012, 02:02 PM
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Zooks527 Zooks527 is offline
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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.
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Last edited by Zooks527; 12-04-2012 at 02:04 PM.
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  #3  
Old 12-04-2012, 02:49 PM
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MP3_E46 MP3_E46 is offline
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Quote:
Originally Posted by Zooks527 View Post
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?
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  #4  
Old 12-04-2012, 02:55 PM
ctuna ctuna is offline
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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.

Last edited by ctuna; 12-04-2012 at 02:57 PM.
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  #5  
Old 12-04-2012, 03:17 PM
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DSXMachina DSXMachina is offline
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Quote:
Originally Posted by ctuna View Post
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.

Last edited by DSXMachina; 12-04-2012 at 03:23 PM.
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  #6  
Old 12-04-2012, 03:46 PM
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MP3_E46 MP3_E46 is offline
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Quote:
Originally Posted by ctuna View Post
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?
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Last edited by MP3_E46; 12-04-2012 at 03:48 PM.
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  #7  
Old 12-04-2012, 03:48 PM
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Zooks527 Zooks527 is offline
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Quote:
Originally Posted by MP3_E46 View Post
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.


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Prior 33 years of cars: 1967 BelAir wagon / 1968 LeMans Tempest / 1970 Mustang Mach 1 / 1972 El Dorado / 1978 Corvette (kept until first Bronco) / 1981 Subaru GL wagon AWD / 1983 s10 Blazer 4x4 (big mistake) / 1985 Bronco 4x4 / 1996 Bronco 4x4 / 2004 Passat 4motion

Last edited by Zooks527; 12-04-2012 at 03:55 PM.
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  #8  
Old 12-04-2012, 04:00 PM
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MP3_E46 MP3_E46 is offline
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Quote:
Originally Posted by Zooks527 View Post
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?
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  #9  
Old 12-04-2012, 04:01 PM
Leekay07 Leekay07 is offline
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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.
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Old 12-04-2012, 04:03 PM
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MP3_E46 MP3_E46 is offline
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Quote:
Originally Posted by Leekay07 View Post
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.
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  #11  
Old 12-04-2012, 04:06 PM
Leekay07 Leekay07 is offline
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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.
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  #12  
Old 12-04-2012, 04:12 PM
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MP3_E46 MP3_E46 is offline
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Originally Posted by Leekay07 View Post
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
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Old 12-04-2012, 05:27 PM
ctuna ctuna is offline
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Fyi

http://www.e90post.com/forums/showth...valve+cleaning
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  #14  
Old 12-04-2012, 05:35 PM
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CALWATERBOY CALWATERBOY is offline
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Originally Posted by Leekay07 View Post
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:

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  #15  
Old 12-04-2012, 05:39 PM
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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
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Last edited by MP3_E46; 12-04-2012 at 05:41 PM.
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  #16  
Old 12-04-2012, 05:41 PM
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DSXMachina DSXMachina is offline
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Originally Posted by Leekay07 View Post
Cal was spot on

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Leekay, what were your oil change intervals?
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  #17  
Old 12-04-2012, 06:21 PM
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andrew b andrew b is offline
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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).

Last edited by andrew b; 12-06-2012 at 12:11 PM.
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  #18  
Old 12-04-2012, 06:47 PM
Leekay07 Leekay07 is offline
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My oil change was 7500.
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Old 12-04-2012, 07:13 PM
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Originally Posted by Leekay07 View Post
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.
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Old 12-04-2012, 07:18 PM
Leekay07 Leekay07 is offline
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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.
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Last edited by Leekay07; 12-04-2012 at 07:19 PM.
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  #21  
Old 12-04-2012, 07:18 PM
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galahad05 galahad05 is offline
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What is head R&R?
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Old 12-04-2012, 07:26 PM
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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.
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Old 12-05-2012, 03:05 AM
Leekay07 Leekay07 is offline
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No they was not removing it. I`ll post the paper work later from the two BMW shops.
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Old 12-05-2012, 05:11 AM
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Originally Posted by Leekay07 View Post
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.
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  #25  
Old 12-05-2012, 06:35 AM
Braumin Braumin is offline
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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.
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