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Blue smoke

Discussion in '2nd Gen. Tacomas (2005-2015)' started by fullback, Jul 1, 2015.

  1. Jul 4, 2015 at 11:33 AM
    #21
    12TRDTacoma

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    Hell yeah. Its the correct way to do it. It's always a bad idea to just shotgun fix stuff because sometimes it won't even fix the problem.

    I was taught compression test is the crank crank crank then hold test, and cylinder leakage (I was never taught to use the word leakdown) test is add air and hold. Anything past 20% and you got some issues you should address.
     
  2. Jul 4, 2015 at 11:37 AM
    #22
    T4RFTMFW

    T4RFTMFW Well-Known Member

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    Cool stories..

    Any update OP?
     
  3. Jul 4, 2015 at 11:44 AM
    #23
    Lord Helmet

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    Well I think you might got the two mixed here. With the compression test you crank at least 3-4 full revolutions of the motor and check the gauge for that particular cylinder you're checking. anything more the 15% shows a issue with the piston rings. With leakdown test, you add air. If you hear or feel air flowing at the throttle body, you have a bad intake valves. If you hear the sound or puffs of air at the tail pipe, the exhaust valves are bad. Any air you hear or feel at the oil cap you're losing compression at the rings. With blown head gasket you can see it and feel it with a leakdown test. With a compression test it's only if you're at the cylinder you are checking but it's not a pinpoint diagnostics.
     
  4. Jul 4, 2015 at 12:01 PM
    #24
    12TRDTacoma

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    Interesting stuff there as far as hearing air out of different areas. I have never heard of doing that before but it makes good sense. How long have you been doing automotive for?

    If I have them both confused then all the other people before me must have been confused as well. Lol.

    Btw the methods you describe are the exact methods as to how you test them. I'm jut wording them differently then you are but same basic principle.
     
  5. Jul 4, 2015 at 12:11 PM
    #25
    12TRDTacoma

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    Googled from "cylinder leakage test kit"

    maxresdefault_zpsyxqzl6l9_15ecec4fc9667ebbb6f793c17de8b47ba6ca8be5.jpg

    Anything above 20% here and you got issues. As 20% and under is ruled as normal due to the inherent nature of piston rings and their less then true sealing chaeacteristics even in brand new condition.

    Googled from compression test kit:

    41Z0RDR62AL._SX355__zpsn2hncxsq_ef78fe1bfc3eae42b7de42db232deb115f7c6229.jpg

    Any variance of over 20 psi and up in any cylinder should be looked at as the compression should be similar across the board if all is well.

    Anyways. My point here is that the terminology I mentioned previously is correct based on the tests I have described. I've never heard of "cylinder leakdown" as some of you talk about, but these two tests right here are the two most important ones on an engine of high mileage and should be done if the PCV valve is not the cure to the issue.

    Sorry to you and OP, didnt want to start a pissing match. Just want to make sure we are both talking about the same thing here
     
    Last edited: Jul 4, 2015
  6. Jul 4, 2015 at 11:07 PM
    #26
    Lord Helmet

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    Well that pretty common stuff to do for a leakdown test. I started doing automotive in the late 80s got my certifications in 1994. I've done everything as small as a lawn mower up to the 18-wheel big rig. Gasoline motors, diesel motors, rotary motors, air brakes, air over hydraulics brake system, etc.... I rebuilt my first 350 CID at the age of 14 and I haven't looked back. I haven't touched any hybrid motors yet so I'm considered old school.
     
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  7. Jul 5, 2015 at 12:53 AM
    #27
    12TRDTacoma

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    They might had changed the verbiage since I started in the early 2000's maybe. I'm thinking that might be the case. I haven't touched hybrid motors either. Those things look like a box of assorted chocolates just waiting to happen (cuz you never know what you gonna get) :D
     
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  8. Jul 5, 2015 at 6:11 AM
    #28
    bubbabud

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    An occasional puff of blue on cold start not using any oil? 185000 miles Duh what's the big deal?
     
  9. Jul 5, 2015 at 7:24 AM
    #29
    Pigpen

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    This

    I'd do the PCV valve. It's easy and cheap. I frequently get a puff out of the exhaust on cool mornings, but I can tell mine is vapor not smoke.
     
  10. Jul 5, 2015 at 7:47 AM
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    Old School

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    No, I'm considered Old School!:laughing:
     
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  11. Jul 5, 2015 at 9:31 AM
    #31
    Lord Helmet

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    :laugh: :thumbsup:
     
  12. Jul 5, 2015 at 10:01 AM
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    USMCwife

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    :mad:
     
    Last edited: Jul 5, 2015
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  13. Jul 5, 2015 at 10:04 AM
    #33
    T4RFTMFW

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    Wat?
     
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  14. Jul 5, 2015 at 10:05 AM
    #34
    T4RFTMFW

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    They're both Marines...
     
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  15. Jul 5, 2015 at 10:06 AM
    #35
    Old School

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    Shots fired!:infantry:

    *compared









    #getbackinthekitchen

    :laugh:
    @USMCwife
     
    Last edited: Jul 5, 2015
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  16. Jul 5, 2015 at 3:48 PM
    #36
    12TRDTacoma

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    Better get to making them sammiches! :D
     
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  17. Jul 5, 2015 at 4:00 PM
    #37
    fullback

    fullback [OP] Well-Known Member

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    12 TRD Tacoma and Lord Helmet thank you for ur inform native comments I learned a lot today didn't know there is an Air test available to test Leaks now I do Thank you again and Thanks internet as this would not be loss I able with out it lol
     
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  18. Jul 5, 2015 at 6:04 PM
    #38
    bubbabud

    bubbabud Well-Known Member

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    There is no way an air pressure leak down test is going to check valve stem oil seals it will check the valve sealing against compression loss but will not check valve stem oil seal's and the oil seal is what could be responsible for the smoke you describe. With the mileage indicated I would call a puff at start up normal.
     
  19. Jul 6, 2015 at 4:17 PM
    #39
    Lord Helmet

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    :wave:
     
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  20. Jul 6, 2015 at 4:22 PM
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    Old School

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    :wave:
     
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