Grind/ rattle above 5K rpm. Ideas???
+ Reply to Thread
Results 1 to 6 of 6

This is a discussion on Grind/ rattle above 5K rpm. Ideas??? within the Engine Modifications forums, part of the Tech & Modifying & General Repairs category; when i step on it, as soon as i get above 5K, i get a grinding rattle noise coming from ...

  1. #1
    Registered User
    Join Date
    Mar 2013
    Posts
    45

    Grind/ rattle above 5K rpm. Ideas???

    when i step on it, as soon as i get above 5K, i get a grinding rattle noise coming from (what i think to be) the turbo. this same thing happened on my gti and it was wastegate rattle (harmless) so thats what i'm thinking it is... any ideas? i wanna get the car tuned soon but dont want any problems going in.

  2. Remove Advertisements
    ClubWRX.net
    Advertisements
     

  3. #2
    Registered User Heide264's Avatar
    Join Date
    May 2010
    Location
    Pittsburgh, PA
    Posts
    4,218
    I Support ClubWRX
    rattling/grinding? Sure it isn't detonating?

    What modifications have been done? Is the tune on the car applicable for those modifications? Any way of data logging? What year/model is the car?

    ...Gotta know a bit more about the car. I would NOT describe that as normal in the slightest bit.
    Quote Originally Posted by Trainrex
    He was throwing balloons filled with sulfuric acid and shrapnel at the swat team. They finally had to take him down with rubber bullets.
    2011 STi Build Log
    -Part 1 - Reading, Data Logging, and Analyzing Data
    -Part 2 - Turbocharger 101 & Basic Boost Control
    -Part 3 - EcuFlash, Experimental Defintions, and a Drive By Wire Intro

  4. #3
    Registered User
    Join Date
    Mar 2013
    Posts
    45
    car is stock other than a Q300 cat back. no not detonating. just a loud buzzing that i would describe at a rattle coming from what seems like the turbo while WOT above 5000k. 2200 miles on my 2013 wrx sedan

  5. #4
    and the Funky Bunch Calvinball's Avatar
    Join Date
    Jan 2012
    Location
    Philly Area
    Posts
    5,971
    Quote Originally Posted by Beans114 View Post
    2200 miles on my 2013 wrx sedan
    Dealership.
    - Will
    First Mods: What to do and what not to do
    Current Car: 2014 Golf TDI
    Previous Cars:2012 WRB WRX Hatch, 2004 RSX-S, 1998 Grand Prix GTP
    "Isn't it amazing how smart you feel when you just aren't being stupid?"

  6. #5
    Registered User Heide264's Avatar
    Join Date
    May 2010
    Location
    Pittsburgh, PA
    Posts
    4,218
    I Support ClubWRX
    No ideas on my end. Could be a lot of stuff... Funny sounds happen when you are above 5k.

    If there isn't anything done to it other than a catback, I wouldn't be too concerned. Without a means of data logging such as a tactrix cable or Cobb AP, I can't really say the sound is/isn't due to a mechanical issue, however.

    Your wastegate should never "rattle", however. It's a pretty "business-oriented" device that won't just flap around given that it is always under some form of pressure. The only sound you should hear from it is the air venting through it, which is pretty distinct even without an intake or downpipe, if I recall correctly.

    I really don't remember hearing a grinding/rattling sound ever above 5k. Your grind/rattle description may be completely different than what I interpret as a grind/rattle though. You may want to ask the dealership if you can ride with a tech and ask if it is normal. Maybe find a local WRX owner and ask them to ride along and see if they recognize it.
    Quote Originally Posted by Trainrex
    He was throwing balloons filled with sulfuric acid and shrapnel at the swat team. They finally had to take him down with rubber bullets.
    2011 STi Build Log
    -Part 1 - Reading, Data Logging, and Analyzing Data
    -Part 2 - Turbocharger 101 & Basic Boost Control
    -Part 3 - EcuFlash, Experimental Defintions, and a Drive By Wire Intro

  7. #6
    Pro Manscaper Mikie13's Avatar
    Join Date
    Oct 2006
    Location
    Palmyra, NJ
    Posts
    21,117
    Quote Originally Posted by Calvinball View Post
    Dealership.
    Warranty. Use it.
    The Hawk-Eye Alliance #90|The Blobeye Syndicate #0|The Stink-Eye Mob #0|N.E.R.D. Founding Member & #3
    2012 Lightning Red WRX Sedan
    Stock...for now Soon to be OpenSource tuned by: Mattypants @ WTF Tuning

+ Reply to Thread

Quick Reply Quick Reply

Register Now

Please enter the name by which you would like to log-in and be known on this site.
If you do not want to register, fill this field only and the name will be used as user name for your post.

Please enter a password for your user account. Note that passwords are case-sensitive.

Please enter a valid email address for yourself. We strongly suggest that you stay away from using aol, yahoo, msn, and hotmail accounts. Sometimes the mail server blocks the emails from our server. As a result you will not receive any notifications including the confirmation email.

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.


Posting Permissions

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