Need Help Diagnosing At Rattle/clank

Taylor Spaulding Jan 23, 2020

  1. Taylor Spaulding

    Taylor Spaulding Bought an X

    Messages:
    54
    Location:
    Vacaville, CA
    Hey all, recently I've been noticing two things which may or may not be related.

    1. A rattling noise when going over bumps, seeming to come from the engine bay near the front.

    2. During idle, especially when in gear, there is a loud clicking that sounds like a solenoid switch followed by 1-2 seconds of rough idle before it calms down. During the rough idle the same or very similar rattling noise comes from the front.

    Almost positive this is not the VIAS rattle, much more "clangy", less buzzy, and occurs at idle only.

    Finally got some good videos this evening
    Here's a link to the gallery

    Rattling from 2013 Nissan Xterra
    Gallery

    It's pretty obvious after the solenoid switches.

    Also here's a new video from the inside of the rattle sound going over bumps

    http://imgur.com/gallery/nUrLtrz
     
  2. General_Tarfun

    General_Tarfun First Fill-Up (of many)

    Messages:
    397
    Location:
    Atlanta, GA
    Those videos help a lot, I was going to suggest looking at the engine mounts based on 'rattle over bumps' lol.

    Whatever it is making the noise sounds like it's always preceded by that solenoid click. Are you running the AC by chance or does it make the noise regardless? I'd try pulling the serpentine belt off and running it for a minute or so to see if the noise still happens without it. If it stops I'd look at the ac compressor first, that on/off click sounds a lot like mine minus the rattle.
     
  3. westslope

    westslope Bought an X

    Messages:
    192
    Location:
    Wildfire country, BC
    The first video had me wondering if the motor fan is striking the plastic cowling.

    No idea what the clunking noise is while driving.

    Good videos BTW!
     
  4. General_Tarfun

    General_Tarfun First Fill-Up (of many)

    Messages:
    397
    Location:
    Atlanta, GA
    I had that happen a few years ago, it was way louder than in his videos. Sounded exactly like a starter being engaged while the engine was running.
     
  5. JeffPro4x

    JeffPro4x Hot Pipe Super Moderator Supporting Member

    Messages:
    9,540
    Location:
    Glenside, PA
    That solenoid sounds like the fan clutch engaging. I'm betting the extra rpm of the fan is causing the lower shroud to rattle. I removed mine for the same reason.
     
  6. Taylor Spaulding

    Taylor Spaulding Bought an X

    Messages:
    54
    Location:
    Vacaville, CA
    Well it could be the lower shroud, that thing is a pain in the ass, and looser than I am. When it fell out before it was an awful noise when the fan struck it. However, it could still be rattling. I just got done swapping the alternator and completely forgot to check the noise with the belt off. :( Also, I'll try it with and without the AC running, see if that makes a difference.
     
  7. Taylor Spaulding

    Taylor Spaulding Bought an X

    Messages:
    54
    Location:
    Vacaville, CA
    Alright all, the saga continues. I ran a quick diagnostic by turning the A/C on and off. Low and behold the click is the A/C compressor clutch and the engine rattle can be made to occur simply by turning it on or off. I doubt that this will also fix the bump rattle, but at least my AC unit won't go bad from a bad bearing.
     
  8. General_Tarfun

    General_Tarfun First Fill-Up (of many)

    Messages:
    397
    Location:
    Atlanta, GA
    Are you able to tell if the noise is coming from within the AC unit or outside? If it's internal it might be about to give out anyway.
     
  9. Taylor Spaulding

    Taylor Spaulding Bought an X

    Messages:
    54
    Location:
    Vacaville, CA
    I haven't figured that out yet, I'm really hoping it's just the clutch bearings, since replacing the entire A/C unit is way too expensive
     
  10. General_Tarfun

    General_Tarfun First Fill-Up (of many)

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    397
    Location:
    Atlanta, GA
    I think your X has nominated you for a clutch bearing replacement how-to lol.
     
  11. Taylor Spaulding

    Taylor Spaulding Bought an X

    Messages:
    54
    Location:
    Vacaville, CA
    Hahahaha the bearings aren't difficult... But it's not the bearings. My compressor is going out. The bearings spin fine and without grinding. :mad:
     
  12. westslope

    westslope Bought an X

    Messages:
    192
    Location:
    Wildfire country, BC
    Xterra specs? Miles driven? Climate?
     
  13. Taylor Spaulding

    Taylor Spaulding Bought an X

    Messages:
    54
    Location:
    Vacaville, CA
    2013 S, 102K miles, Central Valley of CA (Dry, hot, dusty)
     
  14. westslope

    westslope Bought an X

    Messages:
    192
    Location:
    Wildfire country, BC
    I bet. Seems like I can use the air-conditioning more often in the winter months to rid the inside of the windows of condensation than to actually cool the vehicle in the hot summer months.


    P.S. Is that fish a Corvina or a Striped Bass? Or some other species?
     
  15. Taylor Spaulding

    Taylor Spaulding Bought an X

    Messages:
    54
    Location:
    Vacaville, CA
    So today I went and did put my head next to the compressor while a friend started the A/C. Low and behold... Not the compressor or the clutct. Back to square 1.

    Striped bass! 43lbs :)
     
  16. westslope

    westslope Bought an X

    Messages:
    192
    Location:
    Wildfire country, BC
    Sweet! Which coast?
     
  17. Taylor Spaulding

    Taylor Spaulding Bought an X

    Messages:
    54
    Location:
    Vacaville, CA
    West coast, Sacramento-San Joaquin Delta
     
  18. General_Tarfun

    General_Tarfun First Fill-Up (of many)

    Messages:
    397
    Location:
    Atlanta, GA
    Might be time to break out the screwdriver stethoscope. Have you had a chance to pull the belt off yet?
     
    Taylor Spaulding likes this.
  19. Taylor Spaulding

    Taylor Spaulding Bought an X

    Messages:
    54
    Location:
    Vacaville, CA
    Past time for sure. I haven't since I did to replace the alternator and by then I was ready to be done. Alternator all but refused to slide in place
     
  20. Taylor Spaulding

    Taylor Spaulding Bought an X

    Messages:
    54
    Location:
    Vacaville, CA
    Well I feel sheepish. I had the general location correct, but the cause completely wrong.

    Thank you @05RedBrawn6Sp over on TNX for directing me towards the sway bar bushings. Fortunately it was not the bushings, it was in that area though. At some point I must have banged my stock rad skid bending it slightly. This slight bend was causing it to rest ever so slightly against the frame. Additionally, it clearly loosened the skid, allowing it to vibrate. When going over bumps I'm pretty sure the flimsy aluminum was basically just flapping against the frame. Then when the car idles rough due to AC compressor, the skid starts rattling against the frame. I can't be certain this is the only rattle. But after I bent it back down, no more rattle. Can't wait to replace with a full size skid when I get my front bumper!
     
  21. General_Tarfun

    General_Tarfun First Fill-Up (of many)

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    Location:
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    Well that's a pretty big win lol. I'll take sheepish over hours of labor + expensive parts any day.
     
  22. westslope

    westslope Bought an X

    Messages:
    192
    Location:
    Wildfire country, BC
    Great news! Simple is good.

    Though I tripped over this notion of the vehicle idling rough with the AC on. I recall the rpms going up under AC load but never idling "rough".
     
  23. General_Tarfun

    General_Tarfun First Fill-Up (of many)

    Messages:
    397
    Location:
    Atlanta, GA


    It used to happen to mine maybe 5 years ago, in my case RPM's would drop and the engine would kind of bog down under the extra load producing a rough idle. Wish I could exactly remember what made it go away but it was around the time I discontinued use of a K&N oiled filter, completely cleaned/degreased the intake piping & throttle body, replaced the pcv valve/hose, and started using paper filters again and replacing them every 10-12 months.
     
  24. westslope

    westslope Bought an X

    Messages:
    192
    Location:
    Wildfire country, BC
    G_T: Wild guess on my part, but I am thinking that cleaning the throttle body could have been the key step.
     
  25. General_Tarfun

    General_Tarfun First Fill-Up (of many)

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    Location:
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    If I remember correctly it made the biggest difference but they all helped to a degree. New engine mounts sealed the deal.
     
  26. brazos_bend

    brazos_bend Test Drive

    Messages:
    6
    Will new engine mounts help with the rough idle at stop lights? Mine is 9 years old and shaking crazy. My CAI intake will bonk against the frame/body sometimes on big bumps or rattle against the hoo.d
     
  27. General_Tarfun

    General_Tarfun First Fill-Up (of many)

    Messages:
    397
    Location:
    Atlanta, GA
    They should def help if you use the OE mounts. If you go with poly the movement will be even further reduced but it's less forgiving of vibration.
     

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