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Please Help!! Have a 98 Detroit with a engine noise

Discussion in 'Trucks [ Eighteen Wheelers ]' started by smp440, Apr 18, 2014.

Page 1 of 2
  1. Apr 18, 2014 #1
    smp440

    smp440 Light Load Member

    58
    1
    Dec 28, 2012
    Shreveport, LA
    0
    Bought a 1998 Int. with Detroit 60 12.7 truck has 1.55 mil on it. Not sure how many are on the engine or the components of the engine.

    After an oil change 2 days ago. (this may or may not be related) I drove 70 miles to my pick up and when I got out with truck idling the engine was making a noise. It sounds similar to a vehicle with low power steering. A low whining or growling. I jumped back in the truck and tapped the accelerator a few times and it speeds up and slows down with the engine. I walked in front of the truck to open the hood and it was loud there like its at the front of engine... BUT WAIT. After opening the hood and listening all around both sides it seems louder on the passenger side and not quite at the front, maybe around the cylinder 2 area or turbo. Turbo seems to sound fine when spooled. This is listening with no tools just naked ear.

    Turned on the AC no change, Doesn't seem to be coming from alt. If I rev truck hard a few times and let it come to idle it seems to fade just a bit or all the way for a few seconds.

    Any help would be appreciated. Thanks in Advance
     
    smp440, Apr 18, 2014
    smp440, Apr 18, 2014
    #1
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  3. Apr 18, 2014 #2
    smp440

    smp440 Light Load Member

    58
    1
    Dec 28, 2012
    Shreveport, LA
    0
    Oh, forgot to mention.
    It doesn't seem to make the noise when I start it cold, only after its good and warm
     
    smp440, Apr 18, 2014
    smp440, Apr 18, 2014
    #2
  4. Apr 18, 2014 #3
    blanco

    blanco Road Train Member

    1,221
    296
    Nov 20, 2009
    Gwinnett County, GA
    0
    Gear whine from bullgear? I'd take it to a detroit mechanic before it blows.
     
    blanco, Apr 18, 2014
    blanco, Apr 18, 2014
    #3
  5. Apr 18, 2014 #4
    BeenJammin

    BeenJammin Light Load Member

    256
    117
    Dec 17, 2013
    0
    Start with the process of elimination, remove belts one at a time to see if noise goes away. If not, next place, pull intake tube from turbo and inspect for excessive end play or up and down movement (some up and down movement is normal) if not there, make you a homemade listening device, like a wooden dowel rod or wooden broom handle, hold one end to different places on engine(water pump-right side accessory drive etc.) and encircle the other end with your hand and hold it directly against your ear. This will magnify sounds (redneck stethoscope). If you are still unable to pin down location, remove r/s acc drive and inspect bearings etc- also while you got it out check out your bull gear for excessive movement, gear teeth damage etc. Lots of possibilites for that kind of noise.
     
    BeenJammin, Apr 18, 2014
    BeenJammin, Apr 18, 2014
    #4
    Willmann30 and Smellfunny Thank this.
  7. Apr 19, 2014 #5
    QUALITYTRUCK

    QUALITYTRUCK Road Train Member

    1,780
    1,726
    Jun 14, 2009
    romulus,mi
    0
    sounds like accessory drive.BeenJammin has the right idea.good luck.
     
    QUALITYTRUCK, Apr 19, 2014
    QUALITYTRUCK, Apr 19, 2014
    #5
  8. Apr 19, 2014 #6
    GrapeApe

    GrapeApe Road Train Member

    2,215
    2,203
    Jan 7, 2013
    0
    Accessory drive, bull gear, fan hub. Could be many things. Most things make a whining noise can cause a lot of damage when they let loose. This is something that needs to be looked at ASAP.

    Do as BeenJammin said to narrow it down.
     
    GrapeApe, Apr 19, 2014
    GrapeApe, Apr 19, 2014
    #6
  9. Apr 19, 2014 #7
    heavyhaulerss

    heavyhaulerss Road Train Member

    3,723
    2,038
    Dec 23, 2009
    AL/TN BORDER
    0
    Bull gear bearing! Something getting ready to sling all apart!
     
    heavyhaulerss, Apr 19, 2014
    heavyhaulerss, Apr 19, 2014
    #7
  10. Apr 20, 2014 #8
    smp440

    smp440 Light Load Member

    58
    1
    Dec 28, 2012
    Shreveport, LA
    0
    OK, Today I got a chance to check it with a wooden dowel rod (flag pole) working with what I have available. The noise seemed louder with it on the drivers side, on block. cylinder 2 area... Crazy I know.
    My first thought when starting post was the bull gear. Didn't want to let on and lead people there. But after today I'm a bit confused. I took video with phone moving it around to different areas to see if I could pull anything out with it. I can hear it in the video but its more a background noise and never changes with phone movement.
    I will definitely take it to a tech first chance I get this week. Hopefully it doesn't let me down before then.
     
    smp440, Apr 20, 2014
    smp440, Apr 20, 2014
    #8
  11. Apr 20, 2014 #9
    smp440

    smp440 Light Load Member

    58
    1
    Dec 28, 2012
    Shreveport, LA
    0
    Also Thanks to everyone helping so far.
    And I know
    Something getting ready to sling all apart!
    lol
     
    smp440, Apr 20, 2014
    smp440, Apr 20, 2014
    #9
  12. Mar 4, 2017 #10
    serozhah

    serozhah Light Load Member

    283
    45
    Sep 8, 2013
    0
    did you ever figure out what the problem was?
     
    serozhah, Mar 4, 2017
    serozhah, Mar 4, 2017
    #10
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