M50b25 what is this?

[bassakos]

which is the use of that? (No 10 )
i have an conefilter and i want to make a DIY heat shield BUT this this is mess thinks around , and i wonder if i erase it , what will happen

[lolcantturn]

Directs hot coolant to your throttle body in case you live in antartica and your throttle body plate freezes shut.


But even in -25*F, this won't come close to happening to just delete it.

[bimmerteck]

Directs hot coolant to your throttle body in case you live in antartica and your throttle body plate freezes shut.


But even in -25*F, this won't come close to happening to just delete it.

Incorrect.


Throttle ice is formed at or near a partly closed throttle valve. The water vapour in the induction air condenses and freezes due to the venturi effect cooling the air as it passes the throttle valve. Since the temperature drop is usually around 8°F, the optimum temperature for forming throttle ice is between 32°F to +39°F although throttle ice could occur at higher ambient temperatures, dependent on relative humidity and dew point.

[lolcantturn]

Incorrect.


Throttle ice is formed at or near a partly closed throttle valve. The water vapour in the induction air condenses and freezes due to the venturi effect cooling the air as it passes the throttle valve. Since the temperature drop is usually around 8°F, the optimum temperature for forming throttle ice is between 32°F to +39°F although throttle ice could occur at higher ambient temperatures, dependent on relative humidity and dew point.

The reason why this design is used is because many airplanes experienced engine choking from the throttle body experiencing icing around the plate. The venturi effect is more prevelent to airplanes that reach less dense and colder air temperatures and a more exposed engine to temperature, but the engine soaking alone is enough to de-ice any "icing" your TB experiences...it may be -30*F outside, but your engine bay alone is much much much hotter.

By the time your coolant can even get warm, your engine bay will be much warmer than 100*F. As you know, the reason why the coolant gets hot is because your engine is warming up! Your intake manifold and the heatsoaking around it alone will warm it before the coolant ever gets a chance to!

In paper, it is a good design, but I can guarentee you've never heard of anyone experiencing an iced TB plate or a TB plate "cracked" open due to ice.

[bimmerteck]

The reason why this design is used is because many airplanes experienced engine choking from the throttle body experiencing icing around the plate. The venturi effect is more prevelent to airplanes that reach less dense and colder air temperatures and a more exposed engine to temperature, but the engine soaking alone is enough to de-ice any "icing" your TB experiences...it may be -30*F outside, but your engine bay alone is much much much hotter.

By the time your coolant can even get warm, your engine bay will be much warmer than 100*F. As you know, the reason why the coolant gets hot is because your engine is warming up! Your intake manifold and the heatsoaking around it alone will warm it before the coolant ever gets a chance to!

In paper, it is a good design, but I can guarentee you've never heard of anyone experiencing an iced TB plate or a TB plate "cracked" open due to ice.

You should listen more and advise less. ;)

[lolcantturn]

This topic has been discussed various upon various upon various times on every single BMW forum. You can delete it safely with no concern, I'm not sure what you're on about if you're not going to actually reply to my post.

[bassakos]

ok then! i will erase it!!!
thanks!

[bimmerteck]

This topic has been discussed various upon various upon various times on every single BMW forum. You can delete it safely with no concern, I'm not sure what you're on about if you're not going to actually reply to my post.

"The forums" deciding something multiple times does not change the laws of physics, no matter how much one hopes that it will. I have better things to do with my time than educate you, I personally recommend you start with a book or two on the topic of thermodynamics. The OP can determine for themselves it they would rather trust the bulk of the forums' general knowledge or BMW's engineers. ;)

[lolcantturn]

I think you disregarded what I said though, is this still applicable when the throttle body is not only bolted to a warm intake manifold but is exposed to the heat of an engine, that is enclosed under a hood and an engine bay?
I am well aware of what the venturi effect is...and how this can actually be used successfully

But I will paypal you $10 if you can find an actual BMW owner that has experienced failure as a result of deleting this.

[bimmerteck]

I think you disregarded what I said though, is this still applicable when the throttle body is not only bolted to a warm intake manifold but is exposed to the heat of an engine, that is enclosed under a hood and an engine bay?
I am well aware of what the venturi effect is...and how this can actually be used successfully

But I will paypal you $10 if you can find an actual BMW owner that has experienced failure as a result of deleting this.

I've seen it cause EML lights on newer BMWs several times on cars around here. We have a more of it than some areas of the country due to a high relative humidity.

Give me a fax number and I'll have a WO faxed to you from out local dealer to collect my $10.

[frankenbeemer]

I've seen it cause EML lights on newer BMWs several times on cars around here. We have a more of it than some areas of the country due to a high relative humidity.

Give me a fax number and I'll have a WO faxed to you from out local dealer to collect my $10.

Just post it up here.

[lolcantturn]

I've seen it cause EML lights on newer BMWs several times on cars around here. We have a more of it than some areas of the country due to a high relative humidity.

Give me a fax number and I'll have a WO faxed to you from out local dealer to collect my $10.

Post it up here, I have no fax number.

I don't know anything about EML lights and newer BMWs, but was the car completely drivable?

[bimmerteck]

Actually my friend(the service writer) just pointed out that it isn't really fair to use my own work orders since I was the tech diagnosing, so he's looking for one from a third party. When he digs one up and faxes it to me I'll scan it and post it up.

Completely drive-able does not mean that the vehicle has not experienced a failure. I have seen may in-range MAF failures that cause nothing more than skewed fuel trim readings, but the MAF has still failed. In the case of the throttle bodies most would experience it as a sticky feel to the throttle, flicking the throttle a few times is enough to remedy it in most cases, but it is a failure. It's not like your throttle will magically pin at WOT and cause you to lose control, we're talking about a sticking throttle at cruise speeds, often only effecting the cruise control or other very light throttle conditions.

[NbAmTwE]

So now that everyone's dick has been sized up....

If you delete it, cap it off?
If you keep it, do you remove item #10 and run 15 directly to the TB?

[lolcantturn]

So now that everyone's dick has been sized up....

If you delete it, cap it off?
If you keep it, do you remove item #10 and run 15 directly to the TB?

You get a barbed brass hose mender, two hose clamps.
Run hose 13 off of the HEAD to hose 9 off of the SPIDER hose. used the mender and 2 hose clamps to connect it. boom