Go Back   Team-BHP > Under the Hood > Technical Stuff


Reply
 
Thread Tools Search this Thread
Old 21st November 2010, 09:27   #1
Senior - BHPian
 
akshay4587's Avatar
 
Join Date: Mar 2005
Location: Chandigarh/Mohali/Ambala Cantt
Posts: 3,756
Thanked: 1,552 Times
Default Smoke from Car's Exhaust-Why?

I got End Can(Muffler)of my Accent replaced Last weekend.
My car is usually driven with a Light foot(2-2.7KRPM) 95% of the times,and driven only by me,and not to mention,it has always been pampered with Mobil 1 fully synthetic.
Yesterday early morning,while coming back from chandigarh,i found a nice open stretch,so for a change,i stretched her legs in overdrive.
Suddenly i got a call,and i pulled over to the road side,i let the car idle,and came out for a breath of fresh air and attend the call.
I suddenly sensed burning smell,i was standing near the front left wheel,and i got a mild heart attack,from what i saw,there was smoke all over(infact near the front wheel too).
Immediately i ran and shutdown the engine,and fearing worst,i popped the hood,thankfully everything was like as it should have been,no oil\coolant anywhere,and even the coolant can was full.
I started her,and it came to life normally,then i noticed smoke is coming from the exhaust,i was so heartbroken.:(.
I revved her,and more smoke,and lots of it in blue color,with extreme burning odour.
Checked coolant and engine oil again,and found it to be normal.
slowly i left that place,and 10Kms later i was back home.
I checked it again,but there were no signs of smoke????
i revved it again,and no smoke,all i had was water and water vapours from exhaust.?
Why did it happen?
1)New Exhaust muffler?
2)I had got oil changed sometime back,and i had 100ml of extra mobil1 lying around,and the mech,had added that too to the oil,can it be due to extra 100-200ml oil in the sump???
akshay4587 is offline   Reply With Quote
Old 21st November 2010, 10:56   #2
Senior - BHPian
 
manikjeet's Avatar
 
Join Date: Sep 2006
Location: chandigarh
Posts: 1,606
Thanked: 109 Times
Default

are you sure it was blue smoke. usually blue smoke comes when the engine consumes oil.
it could be the extra mobil1.
and the new muffler will sound empty but never give out blue smoke

do a simple test
start the engine and put your hand on exhaust so as to cover it completely then let it go

see the colour of smoke and hear for a pop sound


now go to the engine bay take out the dip stick and put your finger over it. remove your tum and see for oil traces on it

it no blue smoke comes and no oil on the finger the engine is fine

ps during the exhaust thing white smoke is good sign
manikjeet is offline   Reply With Quote
Old 21st November 2010, 13:08   #3
Senior - BHPian
 
akshay4587's Avatar
 
Join Date: Mar 2005
Location: Chandigarh/Mohali/Ambala Cantt
Posts: 3,756
Thanked: 1,552 Times
Default

Manik,i already checked,by covering the exhaust with hand,and then revving it.
There is no smoke,i only get traces of water on hand.
Also,searched around on internet,and asked my mechanic.
The new muffler comes coated with some material to prevent rusting while storage,the smoke comes due to its burning,i just wish its that only.
akshay4587 is offline   Reply With Quote
Old 21st November 2010, 13:35   #4
Senior - BHPian
 
Join Date: Aug 2010
Location: Delhi
Posts: 2,131
Thanked: 1,002 Times
Default

Quote:
Originally Posted by akshay4587 View Post
Manik,i already checked,by covering the exhaust with hand,and then revving it.
There is no smoke,i only get traces of water on hand.
Also,searched around on internet,and asked my mechanic.
The new muffler comes coated with some material to prevent rusting while storage,the smoke comes due to its burning,i just wish its that only.
Yes that is the only reason. New parts come with a coating as well as plastic wrap. At times while fitting, small pieces of plastic remain inside. When the exhaust is hot enough the plastic ignites.
Aroy is offline   Reply With Quote
Old 21st November 2010, 15:00   #5
Senior - BHPian
 
manikjeet's Avatar
 
Join Date: Sep 2006
Location: chandigarh
Posts: 1,606
Thanked: 109 Times
Default

yes bro i also hope the same

I suggest to let the exhaust fill up and then see
manikjeet is offline   Reply With Quote
Old 21st November 2010, 15:23   #6
v&v
Senior - BHPian
 
v&v's Avatar
 
Join Date: Aug 2007
Location: Delhi
Posts: 1,538
Thanked: 1,068 Times
Default

@akshay4587 - Since you said blue smoke, it is always advisable to double check.
Get a compression test done, but before that once again drive hard at higher RPM. Check for oil burning smell again/smoke.

it will clear all doubts.
v&v is offline   Reply With Quote
Old 21st November 2010, 16:13   #7
Senior - BHPian
 
abhibh's Avatar
 
Join Date: Sep 2005
Location: Back in the HOOD near you!
Posts: 2,767
Thanked: 33 Times
Default

Early morning ? how early

I doubt there is anything wrong with the car. Can be due to extra oil or fuel.

Similar thing happened in Skoda and you know how such things gives heart attack in Skoda's. Early morning white smoke on pushing hard went back to normal by 10AM. Never happened again.

Check now if you still see blue smoke ?

Last edited by abhibh : 21st November 2010 at 16:20.
abhibh is offline   Reply With Quote
Old 22nd November 2010, 11:16   #8
GTO
Team-BHP Support
 
GTO's Avatar
 
Join Date: Feb 2004
Location: Bombay
Posts: 47,697
Thanked: 89,106 Times
Default

I've always noticed a li'l smoke for the first 300 - 400 kms after getting a new exhaust. Been told it's due to the oil & coatings inside the pipes + muffler. I wouldn't worry about it if I were you. Just drive around for a couple of days and come back to update us.
GTO is offline   Reply With Quote
Old 23rd November 2010, 04:53   #9
BHPian
 
Join Date: May 2006
Location: Melbourne
Posts: 156
Thanked: 2 Times
Default

Hi ,

It could be due to driving at high speed , as its normal for cars to consume & burn a bit of oil at high speeds ,

also the extra 100ml oil at high speeds could burn out - if you dont see it again , its the extra oil which you put in.

kindly update your Kms on car & year.

Thanks :-)
passion4cars is offline   Reply With Quote
Old 23rd November 2010, 23:02   #10
Senior - BHPian
 
Join Date: Sep 2006
Location: zxc
Posts: 3,394
Thanked: 658 Times
Default

Quote:
Originally Posted by passion4cars View Post
Hi ,

It could be due to driving at high speed , as its normal for cars to consume & burn a bit of oil at high speeds ,

also the extra 100ml oil at high speeds could burn out - if you dont see it again , its the extra oil which you put in.

kindly update your Kms on car & year.

Thanks :-)
Only you have worn piston ring.

BTW he is using synthetic remember, it made for such high rpms/speeds
SirAlec is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
white smoke from exhaust...its Turbo baleno neo_trace Technical Stuff 41 28th March 2015 11:39
black smoke from exhaust 2fast4u Technical Stuff 32 10th August 2010 13:48
Verna crdi: black smoke from exhaust live2drive Technical Stuff 32 26th November 2008 11:43
Dark Greyish Smoke bellows from exhaust pipe Rahulk76 Technical Stuff 7 13th March 2006 01:06


All times are GMT +5.5. The time now is 10:33.

Copyright 2000 - 2017, Team-BHP.com
Proudly powered by E2E Networks