Bluish smoke

007_e350 · 10-22-2016, 11:56 PM

Hey diesel gurus, is it normal to have bluish smoke on a cold start for like 5 secs ... I'm running jr stage 2+, alpha soup removed

Thanks

Torqu3 · 10-23-2016, 12:28 AM

I think I'd be more concerned if your car DIDN'T smoke with a Stage 2+ tune and alpha delete. It comes with the territory.

335dsleeper · 10-23-2016, 07:54 AM

My X5 with 175k does not smoke at all, ever. My 335d will smoke on start up but only after spirited driving. I believe it's because of blow-by making its way into the intake under spirited driving, dripping into the intake port etc. I do not have a catch can. It'd be interesting to see if guys with catch cans are experiencing smoke on start up.

007_e350 · 10-23-2016, 08:21 AM

Quote:

Originally Posted by 335dsleeper

My X5 with 175k does not smoke at all, ever. My 335d will smoke on start up but only after spirited driving. I believe it's because of blow-by making its way into the intake under spirited driving, dripping into the intake port etc. I do not have a catch can. It'd be interesting to see if guys with catch cans are experiencing smoke on start up.

What tune do you have & which oil do you put in ?

(I have Jarek's 2.25 custom tune (he didnt give me 2.5 his concern was higher EGTs for X5 could affect reliability IDK..) - Also the car loved Liqui Moly 5w-30 but I put in bmw dealer oil this time.. it amazing how diesel engine reacts so much differently to various oils..

335dsleeper · 10-23-2016, 08:36 AM

Quote:

Originally Posted by 007_e350

What tune do you have & which oil do you put in ?

(I have Jarek's 2.25 custom tune (he didnt give me 2.5 his concern was higher EGTs for X5 could affect reliability IDK..) - Also the car loved Liqui Moly 5w-30 but I put in bmw dealer oil this time.. it amazing how diesel engine reacts so much differently to various oils..

BPC in both. Rotella T6 with Archoil 9100 in both.

Poosik · 10-23-2016, 12:10 PM

My blowby is routed to atmosphere,but still get blueish smoke on startup.

335dsleeper · 10-23-2016, 12:14 PM

Quote:

Originally Posted by Poosik

My blowby is routed to atmosphere,but still get blueish smoke on startup.

Blue smoke only on start up?

Why would you vent to atmosphere? Vacuum on the crank case is good and needed, and could be why you have blue smoke. Crank case vacuum assists in ring seal and absolutely no reason to sent to atmosphere.

32valves · 10-23-2016, 08:09 PM

mine does it since the exhaust is straight thru from turbos to tail pipes.

335dsleeper · 10-24-2016, 02:27 AM

Quote:

Originally Posted by 32valves

mine does it since the exhaust is straight thru from turbos to tail pipes.

Mine is too. Zero smoke with the x5. 335d only on start up after a few hard pulls.

Poosik · 10-24-2016, 07:46 AM

Maybe so, however venting to atmosphere prevents nasty oily blow by being ingested back into intake tract.
I also enjoy watching the stream of blowby emitted on a cold windless mornings.
The car emitted the bluish smoke at startup long before the blowby was routed away from intake tract.
Leaky injectors could also cause this.

007_e350 · 10-24-2016, 11:19 AM

Quote:

Originally Posted by 335dsleeper

Blue smoke only on start up?

Why would you vent to atmosphere? Vacuum on the crank case is good and needed, and could be why you have blue smoke. Crank case vacuum assists in ring seal and absolutely no reason to sent to atmosphere.

I agree, you need that vaccum .. I'd do a catch can instead

335dsleeper · 10-24-2016, 01:25 PM

^. Yup. Literally zero reason not too.

10-22-2016, 11:56 PM	#1
007_e350 Lieutenant Colonel 217 Rep 1,909 Posts Drives: 335i 2008 MHD'd / x5d E70 Join Date: May 2013 Location: left lane iTrader: (3)	Bluish smoke Hey diesel gurus, is it normal to have bluish smoke on a cold start for like 5 secs ... I'm running jr stage 2+, alpha soup removed Thanks __________________ Mods: 7" VRSF FMIC, Forge DVs, RB PCV, BMS Oil Cooler, VRSF DPs, MHD, JB4g5, OFT DIYs: Walnut blasting : Trans Oil at 45k, w Filter at 65k : Diff Oil Flush @ 45k : WP&TS @ 69k : Alternator @ 79k --- E70d Alphabet Soup del 44.4k : JR Stg2.25 tune : Buzzken Catted Exhaust : Trans fluid drain/ fill (3 Qrts), both Diffs fluids flushed Wheels: Style 95s on PSSs (Sold): AG 359s on S04s : 162s on Blizzaks : Rohana RF1 Matt black
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10-23-2016, 12:28 AM	#2
Torqu3 Major 319 Rep 1,157 Posts Drives: 2011 335d Join Date: Sep 2016 Location: Centralish Texas iTrader: (0)	I think I'd be more concerned if your car DIDN'T smoke with a Stage 2+ tune and alpha delete. It comes with the territory.
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10-23-2016, 07:54 AM	#3
335dsleeper Banned 389 Rep 1,623 Posts Drives: 09' 335d 10'35D Join Date: Dec 2015 Location: Suffolk, va iTrader: (0)	My X5 with 175k does not smoke at all, ever. My 335d will smoke on start up but only after spirited driving. I believe it's because of blow-by making its way into the intake under spirited driving, dripping into the intake port etc. I do not have a catch can. It'd be interesting to see if guys with catch cans are experiencing smoke on start up.
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10-23-2016, 12:10 PM	#6
Poosik Private First Class 23 Rep 133 Posts Drives: BMW 335D Join Date: Jan 2014 Location: Connecticut iTrader: (0)	My blowby is routed to atmosphere,but still get blueish smoke on startup.
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10-23-2016, 08:09 PM	#8
32valves Captain 108 Rep 934 Posts Drives: 2011 335d sport Join Date: Mar 2014 Location: DC area iTrader: (0)	mine does it since the exhaust is straight thru from turbos to tail pipes.
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10-24-2016, 07:46 AM	#10
Poosik Private First Class 23 Rep 133 Posts Drives: BMW 335D Join Date: Jan 2014 Location: Connecticut iTrader: (0)	Maybe so, however venting to atmosphere prevents nasty oily blow by being ingested back into intake tract. I also enjoy watching the stream of blowby emitted on a cold windless mornings. The car emitted the bluish smoke at startup long before the blowby was routed away from intake tract. Leaky injectors could also cause this.
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10-24-2016, 01:25 PM	#12
335dsleeper Banned 389 Rep 1,623 Posts Drives: 09' 335d 10'35D Join Date: Dec 2015 Location: Suffolk, va iTrader: (0)	^. Yup. Literally zero reason not too.
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