[luca335i]

Did u ask BMW if they can do it.

[inthemiddle]

Mr. 5 that #10 would be what i was talking about.. but a couple other people mentioned that it goes to a vacuum pump not the throttle body or manifold...

To be honest.. I didn't look at where stuff was...

someone else said it ran to the diverter valves... i'm not sure how all that stuff works so i can't really comment...

[JayKay335i]

I have a friend with a GLI with a huge turbo. Hes been running meth for the last 20k and he is now @ 50k. He just did a full tear down and said his internals were all sparking clean after running meth/h20. Do it up!

[raceyBMW]

OK, I just went and looked pretty closely at the brake booster vacuum system. DO NOT use this for seafoam. That line runs between basically the vacuum reservoirs (where you do the vacuum bypass for JB2), the high pressure fuel pump???, and the brake master cylinder. It also T's off near the master cylinder and runs through the firewall, but where it goes I don't know. I also don't know why it goes to the fuel pump (I think that's it, under the alternator and intake mani), possibly emissions control...any other ideas?

The only vacuum lines I see running into the intake manifold are the diverter valve lines. I think these would work just fine, probably throw a code while off, but no harm would be done as long as you aren't under boost.

[Park2670]

Like I have said, and the BMW techs... The vacuum lines are run off of a pump, not the intake manifold.

The line that runs to the back of the car is for the exhaust flap I believe.

[raceyBMW]

So is the vacuum pump attached to the hpfp? You can see the vacuum line on the left, and the hpfp on the right.




edit: After looking at this image, that's exactly what it is.



However, from RealOEM, the vacuum pump appears to have a sprocket for a chain drive, so the hpfp is run off the vacuum pump which is driven by the oil pump chain drive...correct?

[Bimmer This]

Funny that I stumbled across this thread. A couple years ago, I use to work as a drivability technician for a GM dealership. Every time we sold an injector service, we also sold what they call a de-carb which cleans carbon buildup stuck on the valves and inside the head. GM has this special solution called "Top Engine Cleaner" which you can buy. Its green in color. You mix 2 ounces of this solution which about 6-8 ounces of clean gasoline. You then start your car and connect a hose from intake manifold vacuum (make sure is somewhat of a small hose and on the intake manifold) and suck it into the manifold. It shouldn't "suck" it in quickly but it should take about 45 seconds to a minute to empty the can. We then turned off the vehicle for 15 minutes while you let that solution soak. After 15 minutes, start her right up and go drive the poop out of it. You'd get soooooooo much smoke come out of your tailpipes, you'd think you blew a head gasket. In all reality, you are just burning all the carbon buildup from the valves. I find this procedure to work very well in my opinion. Sometime when we get a high mileage vehicle with intermittent misfires because you carbon buildup causing the valves to stick open, we would sell them this service and it really helped the car a lot. Also, you can use BG 44K for this procedure. If any of you guys need this GM Top Engine Cleaner, let me know. I might still have some.

[enrita]

This should do the job: http://www.tunap.com/en/ranges/autom...ucts/p133.html
a friend is selling this brand in Italy, will ask him to send me a couple of those :-) by the way he told that should be sprayed in the vacuum line that goes into the intake manifold.. dont know where that is though....

[Mr. 5]

Alright guys,
I did the sea foam last night through the vacuum line and it worked absolutely perfect!!
I disconnected the main vacuum line that goes to the diverter valves and connected it to the canister that came with my hand pump.

I had my wife start the car with the vacuum line off of the diverter valves. This won't harm anything.
I connected the canister with sea foam to the vacuum line and poured in the sea foam while my wife kept it revved up.
The engine sucked everything in perfectly and there was tons of white smoke (which is what is expected)

Here is a picture of what my setup looked like.

[XLR8MF]

Originally Posted by Bimmer This

Funny that I stumbled across this thread. A couple years ago, I use to work as a drivability technician for a GM dealership. Every time we sold an injector service, we also sold what they call a de-carb which cleans carbon buildup stuck on the valves and inside the head. GM has this special solution called "Top Engine Cleaner" which you can buy. Its green in color. You mix 2 ounces of this solution which about 6-8 ounces of clean gasoline. You then start your car and connect a hose from intake manifold vacuum (make sure is somewhat of a small hose and on the intake manifold) and suck it into the manifold. It shouldn't "suck" it in quickly but it should take about 45 seconds to a minute to empty the can. We then turned off the vehicle for 15 minutes while you let that solution soak. After 15 minutes, start her right up and go drive the poop out of it. You'd get soooooooo much smoke come out of your tailpipes, you'd think you blew a head gasket. In all reality, you are just burning all the carbon buildup from the valves. I find this procedure to work very well in my opinion. Sometime when we get a high mileage vehicle with intermittent misfires because you carbon buildup causing the valves to stick open, we would sell them this service and it really helped the car a lot. Also, you can use BG 44K for this procedure. If any of you guys need this GM Top Engine Cleaner, let me know. I might still have some.

Yep, BG products are flat out the best for cleaning out high performance vehicles. The BG 44k is the quite effective and only has to be poured in the gas tank. Now, BG also makes multiple cleaners for throttle bodies and valves but where you would put them I do not know. The BG 44K goes into the gas tank and you are done. It is not the same as additech or STP tank cleaner. Bg is high end as far as performance and price but I wouldn't stick anything into my vehicles or BMW other than BG for cleaning.

[Kevin@AKMotorwerk]

Originally Posted by Mr. 5

Interesting because I never heard of it before.
You guys actually added this to your crank case?

And, What are you guys talking about with using the brake booster?
I watched a video on sea foam, but I honestly don't know what would be better to follow--the instructions for a gas engine or a diesel engine because of the DI.

too lazy to read the entire thread, but if you use seafoam make sure to let it suck in the brake booster vaccuum hose slowly or you can hydrolock your engine quickly. also do it in a remote area becasue its going to smoke like crazy out of the exhaust

[Mr. 5]

Originally Posted by XLR8MF

Yep, BG products are flat out the best for cleaning out high performance vehicles. The BG 44k is the quite effective and only has to be poured in the gas tank. Now, BG also makes multiple cleaners for throttle bodies and valves but where you would put them I do not know. The BG 44K goes into the gas tank and you are done. It is not the same as additech or STP tank cleaner. Bg is high end as far as performance and price but I wouldn't stick anything into my vehicles or BMW other than BG for cleaning.

If you are going to clean the valves in the N54, then pouring it into the gas tank won't do crap.

[raceyBMW]

Originally Posted by Mr. 5

If you are going to clean the valves in the N54, then pouring it into the gas tank won't do crap.

Exactly, that was the whole issue. Awesome that you got it to work for you. Did you also rinse with distilled water as well, or just cleaner?

Does it throw a CEL without the diverter lines attached?

[enrita]

Originally Posted by sexye92

too lazy to read the entire thread, but if you use seafoam make sure to let it suck in the brake booster vaccuum hose slowly or you can hydrolock your engine quickly. also do it in a remote area becasue its going to smoke like crazy out of the exhaust

where is the brake booster vacuum hose located?

[Mr. 5]

Originally Posted by raceyBMW

Exactly, that was the whole issue. Awesome that you got it to work for you. Did you also rinse with distilled water as well, or just cleaner?

Does it throw a CEL without the diverter lines attached?

Distilled water in the engine??
I just used the sea foam. Once it was all in the intake manifold, I let it idle for a couple minutes and then attached the vacuum line.
I then took it for a hard drive!

No cells with the vacuum line disconnected. This makes sense because the engine is not under boost at idle or revving at 2k rpm.

Originally Posted by enrita

where is the brake booster vacuum hose located?

Don't use the brake booster. Use the vacuum line that I used above.

[enrita]

Thanks again Mr.5 for trying this things out! Will do mine as soon as i get hold of the right product!

[Bimmer This]

Good job Mr. 5. Now take apart your head and remove the valves to see if it did a good job cleaning it. LOL, just kidding!

[raceyBMW]

Originally Posted by Mr. 5

Distilled water in the engine??
I just used the sea foam. Once it was all in the intake manifold, I let it idle for a couple minutes and then attached the vacuum line.
I then took it for a hard drive!

No cells with the vacuum line disconnected. This makes sense because the engine is not under boost at idle or revving at 2k rpm.



Don't use the brake booster. Use the vacuum line that I used above.

That's what was recommended here:
http://www.bmw4life.com/ping.htm

Thought it sounded a little strange, but I suppose that little water would just vaporize and basically steam the valves.

[shifterboy45]

in the old days we would run the car up on a dyno (not the fancy dancy ones out now) and trickle water in through the carb throat.. if the car had a hi amount of carbon build up we'd get grayish-white smoke from the tailpipe, until it was clear. but this is really not recommended anymore due to temp drop at the o2 sensor and the cats.. but yes .. water works

[Mr. 5]

Originally Posted by shifterboy45

in the old days we would run the car up on a dyno (not the fancy dancy ones out now) and trickle water in through the carb throat.. if the car had a hi amount of carbon build up we'd get grayish-white smoke from the tailpipe, until it was clear. but this is really not recommended anymore due to temp drop at the o2 sensor and the cats.. but yes .. water works

I'll just stick with the Sea Foam for now.

[GeorgeSmooth]

Originally Posted by Mr. 5

I'll just stick with the Sea Foam for now.

I was hoping you would try the nitros but anyway. Did you notice any change in tone of the car, whilst idling or anything?

[Mr. 5]

Originally Posted by GeorgeSmooth

I was hoping you would try the nitros but anyway. Did you notice any change in tone of the car, whilst idling or anything?

Definitely. It was stumbling while the sea foam was going in and once it finished going in, it was smoothe sailing!