A little blue smoke on startup - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

PollosHermanos · 11-16-2014, 07:50 PM

Long story short , a friend and I did some hooning last night (fully warmed up) for about 3-4 minutes and then continued home. Parked the car for the night.

This morning it was in the 20s and it cranked a little slow and gave a little puff of blueish exhaust. Ran fine on my errand, then when I started it up to come back from home depot it idled a little low (600 rpm) and I was getting a slight intermittent rattle/knock. Turned the car off, started it up again and the idle was fine with no similar noises. I drove carefully home without incident.

Haven't started her up since but I will before I commute tomorrow. Am I being paranoid here? I know our engines are far from quiet. Oil was changed by Subaru at 11,500 miles two weeks ago.

2014 Limited / 11,900 miles / stock but for a drop in and cat back & motul diff & tranny fluid.

Reaper · 11-16-2014, 07:54 PM

Possibly damaged valve seals. Knock and low idle could be from momentarily fouled spark plugs on start up. How badly did you over rev it while hooning?

PollosHermanos · 11-16-2014, 07:57 PM

Bounced off the rev limiter a couple times on one drift/donut.

I'm in the car now and it's idleing fine after a cold start. About 800 rpm.

Maybe I'm being a bit nuts.

ZOMFGAARON · 11-16-2014, 08:02 PM

Are you 100 on it being blue smoke?
Because that's never a good sign

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civdaddy · 11-16-2014, 08:04 PM

I'd check your oil level.

PollosHermanos · 11-16-2014, 08:05 PM

Quote:

Originally Posted by ZOMFGAARON

Are you 100 on it being blue smoke?
Because that's never a good sign

Sent from my iPhone using Tapatalk

No, I'm not. I noticed the 'puff' right after I cranked it when it was floating away from the car to my left. Grey-ish I suppose, but darker than normal when it's 25 degrees out.

PollosHermanos · 11-16-2014, 08:10 PM

Quote:

Originally Posted by civdaddy

I'd check your oil level.

Oil is good, right in the middle of high and low.

ZOMFGAARON · 11-16-2014, 08:19 PM

Quote:

Originally Posted by PollosHermanos

Oil is good, right in the middle of high and low.

If it was that small of a puff I doubt your oil line would differ too much right now. Id say take it in to get looked at.

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PollosHermanos · 11-16-2014, 08:26 PM

Quote:

Originally Posted by ZOMFGAARON

If it was that small of a puff I doubt your oil line would differ too much right now. Id say take it in to get looked at.

Sent from my iPhone using Tapatalk

Agreed on the oil level. I don't plan on taking any chances so a check up seems like a safe plan.

tonyfrs86 · 11-16-2014, 08:32 PM

could it possibly be from oil blow by? i know alot of people on here posting how if you're driving at high revs you should get a catch can. just a thought

civdaddy · 11-16-2014, 09:05 PM

Most likely thing happening is its just "smoking" more because it's getting colder outside. That's probably why your car took a little longer to crank over as well

PollosHermanos · 11-16-2014, 09:07 PM

Quote:

Originally Posted by civdaddy

Most likely thing happening is its just "smoking" more because it's getting colder outside. That's probably why your car took a little longer to crank over as well

Right, and it was a slow crank, not a long one, if that makes sense. Like a slightly low charge on the battery type of crank.

jdcorbitt3 · 11-16-2014, 09:17 PM

These are horizontal engines. Unlike a V or inline engine where residual oil drains out of the combustion chamber, the oil will pool. In aircraft engines, especially when cold, it is not uncommon for them to puff on startup. I wouldn't worry about the engine."Honing" and drag racing is very hard on an drivetrain, and you are likely to wear out drivetrain parts prematurely.

John

11-16-2014, 07:50 PM	#1
PollosHermanos Senior Member Join Date: Oct 2013 Drives: 2014 SWP BRZ Limited 6SP Location: Marshfield, MA Posts: 326 Thanks: 78 Thanked 144 Times in 75 Posts Mentioned: 3 Post(s) Tagged: 1 Thread(s)	A little blue smoke on startup Long story short , a friend and I did some hooning last night (fully warmed up) for about 3-4 minutes and then continued home. Parked the car for the night. This morning it was in the 20s and it cranked a little slow and gave a little puff of blueish exhaust. Ran fine on my errand, then when I started it up to come back from home depot it idled a little low (600 rpm) and I was getting a slight intermittent rattle/knock. Turned the car off, started it up again and the idle was fine with no similar noises. I drove carefully home without incident. Haven't started her up since but I will before I commute tomorrow. Am I being paranoid here? I know our engines are far from quiet. Oil was changed by Subaru at 11,500 miles two weeks ago. 2014 Limited / 11,900 miles / stock but for a drop in and cat back & motul diff & tranny fluid. __________________ 1990 Laser RS - Lights go up, lights go down \|\|1992 MX-6 Coupe - Hah ... no \|\| 2001 Integra GSR - Almost rice. Risotto \|\| 2003 IS300 - A nice car but no fun. \|\| 2011 Stage I GTI - Lots of fun. Would buy another 2014 BRZ - That BRZ. So hot right now.

11-16-2014, 07:54 PM	#2
Reaper in orbe terrum non visi Join Date: Jan 2014 Drives: violent Location: Mountains Posts: 1,747 Thanks: 279 Thanked 762 Times in 446 Posts Mentioned: 62 Post(s) Tagged: 1 Thread(s)	Possibly damaged valve seals. Knock and low idle could be from momentarily fouled spark plugs on start up. How badly did you over rev it while hooning? __________________ I have E85 where there isn't E85, that's my secret. http://www.ft86club.com/forums/showt...t=reaper+build

11-16-2014, 07:57 PM	#3
PollosHermanos Senior Member Join Date: Oct 2013 Drives: 2014 SWP BRZ Limited 6SP Location: Marshfield, MA Posts: 326 Thanks: 78 Thanked 144 Times in 75 Posts Mentioned: 3 Post(s) Tagged: 1 Thread(s)	Bounced off the rev limiter a couple times on one drift/donut. I'm in the car now and it's idleing fine after a cold start. About 800 rpm. Maybe I'm being a bit nuts. __________________ 1990 Laser RS - Lights go up, lights go down \|\|1992 MX-6 Coupe - Hah ... no \|\| 2001 Integra GSR - Almost rice. Risotto \|\| 2003 IS300 - A nice car but no fun. \|\| 2011 Stage I GTI - Lots of fun. Would buy another 2014 BRZ - That BRZ. So hot right now.

11-16-2014, 09:17 PM	#13
jdcorbitt3 Senior Member Join Date: Mar 2013 Drives: 2013 red FR-S, OFT. 2000 Miata SE Location: Ocala Posts: 110 Thanks: 22 Thanked 50 Times in 28 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	These are horizontal engines. Unlike a V or inline engine where residual oil drains out of the combustion chamber, the oil will pool. In aircraft engines, especially when cold, it is not uncommon for them to puff on startup. I wouldn't worry about the engine."Honing" and drag racing is very hard on an drivetrain, and you are likely to wear out drivetrain parts prematurely. John __________________ 2013 firestorm FR-S OFT, OFH, U-Haul Trailer Hitch 2007 Stormy Blue Mica PRHT GT NC Miata, OFT

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ZOMFGAARON A Demon Join Date: Dec 2013 Drives: Raven GT86 Location: Denver Posts: 1,992 Thanks: 190 Thanked 1,321 Times in 701 Posts Mentioned: 20 Post(s) Tagged: 0 Thread(s)	Are you 100 on it being blue smoke? Because that's never a good sign Sent from my iPhone using Tapatalk

11-16-2014, 08:04 PM	#5
civdaddy Senior Member Join Date: Oct 2012 Drives: Slow Location: U.S. Posts: 261 Thanks: 48 Thanked 134 Times in 68 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	I'd check your oil level.

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tonyfrs86 Senior Member Join Date: Apr 2013 Drives: 2013 raven frs Location: seattle Posts: 155 Thanks: 41 Thanked 29 Times in 23 Posts Mentioned: 6 Post(s) Tagged: 0 Thread(s)	could it possibly be from oil blow by? i know alot of people on here posting how if you're driving at high revs you should get a catch can. just a thought

11-16-2014, 09:05 PM	#11
civdaddy Senior Member Join Date: Oct 2012 Drives: Slow Location: U.S. Posts: 261 Thanks: 48 Thanked 134 Times in 68 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Most likely thing happening is its just "smoking" more because it's getting colder outside. That's probably why your car took a little longer to crank over as well

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