E36 - Perfect combustion?

[Russie]

Calling all sifus of E36,I notice that there is still water dripping out of the exhaust tip of my E36 318i during the initial engine start up. I understand that this is a result of perfect combustion, which is a good news? Any sifu to comment on this?

 

[LCP]

Water is a byproduct of the combustion chemical equation, I forgot the exact chemical formula already (ditched Chemistry since Sixth Form)... Generally during idling, the mixture will be slightly richer, but anyhow, water vapour will still form from the combustion.

 

[pussy]

water is also a by product of the combustion process...

 

[Russie]

Thank you for all the replies. Well, I was told that if the engine has loads of carbon deposited inside, you would not get the water effect and same goes for when the air-fuel ratio is not correct. Could this be true?

 

[LCP]

Generally yes, but at idle, the mixture is definitely slightly richer than stoichiometric (spelling?) ratio, else engines can't idle properly.

 

[rubes72]

Russie, although the presence of water vapour from the exhuast is usually good, however if there is too much water can also spell signs that coolent is leaking into the engine combustion. One way of knowing for sure is the colour of your black oil. If is is brownish, then you have some problems.

 

[irdanlz84]

Bro, if it is an initial start up in the morning, the water can also sourced from the morning dew that trapped inside the exhaust piping..

 

[syahruln]

hmm.. my engine has 2 of its 6 pistons with low compression ratio - 4 & 9, dumps carbons & a bit of petrol out from the exhaust, yet still can produce water... how eh? I'm sure it's not dew or rat's pee. Maybe different type of waste materials (carbon/unburned petrol/water) produced by different cylinders?

 

[Zul_84]

Calling all sifus of E36,

I notice that there is still water dripping out of the exhaust tip of my E36 318i during the initial engine start up. I understand that this is a result of perfect combustion, which is a good news? Any sifu to comment on this?

its normal.
petrol is a product of Hydrocarbon, thats mean Hydrogen already present in petrol, when explode that Hydrogen and Oxygen will form H2O which is a water.