OUR VIDEOS GALLERY MEMBER SPONSORSHIP VENDOR SPONSORSHIP

User Tag List

Page 1 of 5 123 ... LastLast
Results 1 to 10 of 43

Thread: Why Diesels Smoke

  1. #1
    Patrol God nissannewby's Avatar
    Join Date
    Mar 2012
    Location
    North brissy
    Posts
    8,200
    Thanks
    1,512
    Thanked 5,663 Times in 3,158 Posts
    Mentioned
    110 Post(s)
    Tagged
    1 Thread(s)

    Why Diesels Smoke

    Hey all

    I have noticed lately there have been a few posts about smoke from diesels etc the colours and all that and what it means so i thought i would post up this link to help all those looking for a bit of info.

    http://www.dieselsmoke.com.au/

    The information below has been taken from the link above, have a read. feel free to go to the link as there are a number of other links embedded there also

    FYI

    Diesel Smoke tells YOU a Story

    Basically, smoke from a diesel engine indicates that something is not right.

    It should be taken as an indication that there is a problem existing (or developing), that will potentially shorten the engine life, or result in unnecessary costs. It should be regarded as an opportunity to take measures that will save you money in both the long term and also the short term. At the least, that smoke may be due to a simple problem, that is causing poor combustion efficiency…and costing you in excessive fuel bills (eg carboned up engine from excessive idling, stop start operation or short run times). At the other end of the scale, it may be your last chance to act, before a catastrophic engine failure occurs (eg piston seizure, valve or turbocharger failure).

    A diesel engine in good condition should produce no visible smoke from the exhaust, under most operating conditions. A short puff of smoke when an engine is accelerated under load may be acceptable, due to the lag before the turbocharger speed and air flow is able to match the volume of diesel injected into the cylinders. That would only apply to older technology diesel engines, but with modern type diesels, no smoke at all should be evident.

    There are three basic types of diesel smoke, identifiable by their colour... Black, Blue and White

    In the outlines below we explain what causes each colour of diesel smoke and provide you with links to high quality products that will help you solve these problems....

    Black smoke is the most common smoke emitted from diesel engines. It indicates poor and incomplete combustion of the diesel fuel. There are many causes, including…

    Incorrect timing
    Dirty or worn injectors
    Over-fuelling
    Faulty turbocharger (ie not enough air to match the fuel)
    Incorrect valve clearance
    Incorrect air/fuel ratio
    Low cylinder compression (eg sticking piston rings or worn components)
    Dirty air cleaner
    Restricted induction system (eg system too small or kinked inlet piping)
    Other engine tune factors
    Poor quality fuel
    Excessive carbon build up in combustion and exhaust spaces
    Cool operating temperatures

    Obviously, worn or damaged components must be replaced, and the earlier you identify and fix the problem, the less damage will be done. Keep on top of engine tune issues, including valve adjustments, and regular servicing of air, fuel and oil filters. Do not buy fuel from suspect outlets. Dirty components, such as injectors can be easily restored to full cleanliness by using an effective and reliable fuel system cleaner. If you choose from our range of products, Cleanpower is what you need.

    Cleaning of internals of engines has usually only been possible at overhaul, however, Cost Effective Maintenance provide two products to enable vehicle and equipment owners to quickly, safely and cheaply restore full cleanliness to combustion and exhaust spaces (FTC Decarbonizer) as well as piston rings, oil pumps, oil galleries, oil coolers, piston skirts, valve gear, etc (Flushing Oil Concentrate).

    Black smoke is high in carbon or soot, which is an undesirable product of diesel combustion. Now, the combustion of diesel is a complicated process of breaking down the various hydrocarbon fuel molecules into progressively smaller and smaller molecules, by burning in the presence of oxygen. The main and ideal end products of combustion are CO2 and H2O (carbon dioxide, the greenhouse gas and water). It is believed that the last step in the process is carbon monoxide (the poisonous gas) to carbon dioxide. This is also the slowest step by far, and when combustion conditions deteriorate some upstream bottle necking occurs in the chain of combustion reactions. This results (according to some authorities) in polymerization of smaller partly burnt molecules into much larger ones, which become visible as soot, or black smoke.

    Blue smoke is an indication of oil being burnt. The oil can enter the combustion chamber for several reasons.
    Worn valve guides or seals
    Wear in power assemblies (ie cylinders, piston rings, ring grooves)
    Cylinder glaze
    Piston ring sticking
    Incorrect grade of oil (eg oil too thin, and migrating past the rings)
    Fuel dilution in the oil (oil thinned out with diesel)
    At cold start, blue smoke is often evident, and can reflect reduced oil control, due to fouling deposits around piston rings or cylinder glaze (which is actually carbon deposited in the machined cylinder crosshatching. These tiny grooves actually hold a film of oil, which in turn completes the seal between the combustion chamber and the oil wetted crankcase). Blue smoke should not be evident at any time, but it is worth noting, that engines with good sound compression can actually burn quite a lot of oil without evidence of blue smoke. Good compression allows oil to burn cleanly, as part of the fuel. It’s not good though!

    Once again, restore physical cleanliness to all components. Replace worn parts where necessary. In some situations, where the engines are pretty worn, but you just need to keep them in service, cleaning with the previously mentioned products, followed by effective additional anti-wear protection, will reduce internal stresses on all those tired components, providing extended service life. Our AW10 Antiwear

    White smoke occurs when raw diesel comes through the exhaust completely intact and unburned. Some causes of this include…
    Faulty or damaged injectors
    Incorrect injection timing (could be a worn timing gear or damaged crankshaft keyway).
    Low cylinder compression (eg caused by leaking or broken valves, piston ring sticking, cylinder and/or ring wear, or cylinder glaze)
    When white smoke occurs at cold start, and then disappears as the engine warms up, the most common causes are fouling deposits around piston rings and/or cylinder glazing. Use of our Flushing Oil Concentrate and FTC Decarbonizer address these respective problems.

    Water entering combustion spaces will also create white smoke. Faulty head gaskets and cracked cylinder heads or blocks are a common cause of water entry, and are often to blame. Unfortunately, expensive mechanical repair is the only proper solution here.

    Check the link at the top to find out more about Cost Effective's Diesel Smoke Solutions
    Last edited by MudRunnerTD; 19th June 2012 at 11:42 PM.

  2. The Following 60 Users Say Thank You to nissannewby For This Useful Post:

    94Taylor (6th September 2017), AB (20th June 2012), Antonio (20th October 2013), Avo (18th August 2013), BIG-_JOHN (10th September 2018), BigRAWesty (4th March 2013), BrazilianY60 (28th October 2022), chipppa (11th December 2013), cookpa (19th August 2012), CQ GQ 92 mark (25th January 2018), Darren H (31st March 2014), Dave_H (21st November 2013), dom14 (17th July 2015), El Comandante (20th January 2019), Finly Owner (22nd June 2012), FNQGU (20th June 2014), gandalf (9th January 2014), gibbo57 (2nd January 2017), GUDriver (18th May 2016), healy (4th March 2013), husqvarna (3rd January 2013), ian59 (26th June 2012), janderson (20th May 2014), jimt (24th June 2014), jman69 (7th July 2012), johan.l (14th September 2015), Justo102 (29th October 2014), krbrooking (28th October 2014), macca (12th June 2013), macca86 (28th October 2012), MEGOMONSTER (1st May 2013), Michelle (20th June 2012), Mick80 (2nd March 2014), mojo53 (5th September 2014), mudnut (2nd December 2016), MudRunnerTD (19th June 2012), my third 256 (23rd June 2012), Oldmate1 (9th September 2015), ova50 (28th October 2012), Patriot (19th May 2020), Patrol Nut (17th September 2013), Patrol-Guy (18th January 2014), PMC (18th January 2013), Rob Poynter (23rd December 2018), Roland the Wolf (13th July 2015), rusty_nail (3rd August 2015), Scottch (21st October 2014), Sherro (30th December 2014), SiberianPatrol (24th July 2015), snewin (28th October 2012), Stropp (1st May 2013), stumpie (24th March 2014), the ferret (28th October 2012), threedogs (14th August 2012), tonyhoughton (8th June 2013), Touses (3rd December 2016), UCAGQ2 (27th January 2014), vanekrus (4th March 2024), Wetty (26th September 2014), Winnie (4th March 2013)

  3. # ADS
    Circuit advertisement
    Join Date
    Always
    Location
    Advertising world
    Posts
    Many

     

  4. #2
    Moderator MudRunnerTD's Avatar
    Join Date
    Jun 2010
    Location
    Geelong
    Posts
    15,379
    Thanks
    12,163
    Thanked 13,452 Times in 6,588 Posts
    Mentioned
    324 Post(s)
    Tagged
    1 Thread(s)
    Good info NewbyGuru lol expanded it for you mate
    Its a Nissan! =====> Its a Keeper!! ....... Got a TD42 in it BONUS!! ....... I'm a lucky bugger! I've got 2 of em!
    Check out my Toy --> MudRunnerTD's GQ From the Ground Up

    Quote Originally Posted by Rogue Dung Beetle View Post
    Wish it was Nissan though, Toyotas just can't keep up with the Pootrol pace.
    The only good thing about an 80 series is..... the front end?? Wrong!!, the Engine?? Wrong!! the Full Time 4WD system?? Wrong!! Its the NissanPatrol.com.au stubby holder fitted over the transfer lever.
    WARNING: Towballs used for recoveries can, and do kill people and damage property.

  5. The Following User Says Thank You to MudRunnerTD For This Useful Post:

    nissannewby (20th June 2012)

  6. #3
    SUCH IS LIFE Maxhead's Avatar
    Join Date
    Jun 2010
    Location
    ACT
    Posts
    11,839
    Thanks
    4,859
    Thanked 6,891 Times in 3,651 Posts
    Mentioned
    50 Post(s)
    Tagged
    1 Thread(s)
    Funny that because when I bought my new rig it has always smoked black smoke from day 1(only a little at starts and big acceleration)compared to my old '08 model which never smoked at all, but the power difference is huge. The new one has heaps more go in it, lots more power and torque..its a rocket!!!
    So I thought black smoke is good
    ________________________
    ______ 2017 D-Max _______



    I don't have a short temper. I just have a quick reaction to bullshit


    WARNING: Towballs used for recoveries can, and do kill people and damage property.

  7. #4
    Patrol God nissannewby's Avatar
    Join Date
    Mar 2012
    Location
    North brissy
    Posts
    8,200
    Thanks
    1,512
    Thanked 5,663 Times in 3,158 Posts
    Mentioned
    110 Post(s)
    Tagged
    1 Thread(s)
    A little is good but if you cant see the rear of car from black then you may have an issue if you have an egt gauge your temps will get higher quicker the more black smoke comes out the back.

  8. The Following User Says Thank You to nissannewby For This Useful Post:

    Maxhead (20th June 2012)

  9. #5
    Administrator AB's Avatar
    Join Date
    May 2010
    Location
    Christmas Hills - Yarra Glen - Victoria
    Posts
    28,054
    Thanks
    13,546
    Thanked 20,713 Times in 8,558 Posts
    Mentioned
    579 Post(s)
    Tagged
    1 Thread(s)
    Good post mate, should help a lot of people out for sure!

  10. #6
    SPAMINATOR growler2058's Avatar
    Join Date
    Feb 2011
    Location
    Shed
    Posts
    23,653
    Thanks
    15,798
    Thanked 12,951 Times in 6,827 Posts
    Mentioned
    45 Post(s)
    Tagged
    0 Thread(s)
    Ive made it a sticky cheers for the post

    IF YA DONT GET STUCK YA AINT TRYIN HARD ENOUGH........OR YA TOOK THE CHICKEN TRACK

    WARNING: TOWBALLS USED WITH SNATCHSTRAPS DO KILL!!

  11. The Following User Says Thank You to growler2058 For This Useful Post:

    nissannewby (20th June 2012)

  12. #7
    Patrol God Finly Owner's Avatar
    Join Date
    Jul 2010
    Location
    Waterford West Qld
    Posts
    5,518
    Thanks
    1,892
    Thanked 971 Times in 722 Posts
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    TOP POST!!!!


    Fantastic INFO!

    I bow to You!




    Tim
    Getting Older Is Unavoidable, Growing Up Is Optional!

  13. #8
    Banned Bigrig's Avatar
    Join Date
    Oct 2010
    Location
    South of Brissy, QLD
    Posts
    9,886
    Thanks
    527
    Thanked 2,206 Times in 1,474 Posts
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Yeah, top post champion!!!

  14. #9
    Advanced OhBugger's Avatar
    Join Date
    Aug 2012
    Location
    Aruba
    Posts
    48
    Thanks
    4
    Thanked 3 Times in 2 Posts
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Thanks for the info!
    Any idea's on how to combat the low fuel quality? Are there recommended additives?

  15. #10
    Patrol God threedogs's Avatar
    Join Date
    Jun 2012
    Location
    Melb
    Posts
    31,636
    Thanks
    10,350
    Thanked 9,963 Times in 7,394 Posts
    Mentioned
    113 Post(s)
    Tagged
    2 Thread(s)
    I thought that was the case, no smoke unless under load. Could always tell when fellow it front about to gun it, little puff and away.
    Used to race unlimited M/Cs and same with a good 2 stroke, shouldn't blow smoke
    04 ST 3lt auto, not enough Mods to keep me happy, but getting there

Page 1 of 5 123 ... LastLast

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •