04 wrx blown up. Replacing with oem ej20 shortblock
Results 1 to 7 of 7

This is a discussion on 04 wrx blown up. Replacing with oem ej20 shortblock within the Builds forums, part of the Tech & Modifying & General Repairs category; So my 04 wrx starting knocking bad a few weeks ago. Im planning on buying a new oem ej20 shortblock. ...

  1. #1
    Registered User Custer175's Avatar
    Join Date
    Feb 2012
    Posts
    50

    04 wrx blown up. Replacing with oem ej20 shortblock

    So my 04 wrx starting knocking bad a few weeks ago. Im planning on buying a new oem ej20 shortblock. My question is should i do anything with the turbo? It has 90k miles on it, and the last thing i want is for the turbo to blow up and takeout the new block with it. How reliable are these turbos? I autocross the car on occasion,and mainly want it to be reliable. Also what should be done to my heads before installing on a new block?

  2. Remove Advertisements
    ClubWRX.net
    Advertisements
     

  3. #2
    He simply abides. SD_GR's Avatar
    Join Date
    Jul 2002
    Location
    CA, US
    Posts
    21,910
    I Support ClubWRX
    The Mitsubishi turbos are proven units. If it has not been abused it should not need replacement. However, since your block has failed very prematurely, I'd look at the turbo and see if you have any obvious signs of failure (oil seals, shaft play, and so on).

    Talk to a machinist about the heads. What should and could be done vary depending on whom you are asking, what the budget says, and your goals.
    WRX Info Links, Courtesy TheJ
    The world breaks everyone and afterward many are strong in the broken places. Ernest Hemingway
    I lied. I cheated. I bribed men to cover the crimes of other men. I am an accessory to murder. But the most damning thing of all... I think I can live with it. And if I had to do it all over again - I would. Benjamin Sisko
    DISCLAIMER: Opinions expressed are the author's alone and are inherently worthless.

  4. #3
    Registered User Custer175's Avatar
    Join Date
    Feb 2012
    Posts
    50
    The turbo has no shaft play, still feels tight. I only put 4k miles on the car so idk how hard it has been driven. It was tuned with a cobb ap stage 2 (17psi i believe?) for about 3k miles

  5. #4
    Registered User
    Join Date
    May 2012
    Posts
    1
    How did you engine blow? I'm planning to buy an 04 wrx with 94K miles for $10K and I don't want to blow $10K. Are these car reliable?

  6. #5
    Registered User Custer175's Avatar
    Join Date
    Feb 2012
    Posts
    50
    Not sure I believe it spun a rod bearing. I was driving the car hard when it happened though so I'm sure that had something to do with it. Not sure on reliability I've only put 4k miles on one lol

  7. #6
    Registered User
    Join Date
    May 2012
    Posts
    3
    lol, I just bought my first Wrx, and it has 90k on it. I'm not an expert but it sounds like too much boost?

  8. #7
    zax
    zax is offline
    \_(ツ)_/ zax's Avatar
    Join Date
    Nov 2008
    Location
    Neverland Ranch, Maryland
    Posts
    11,800
    I Support ClubWRX I Support ClubWRX
    Quote Originally Posted by SD_GR View Post
    However, since your block has failed very prematurely, I'd look at the turbo and see if you have any obvious signs of failure (oil seals, shaft play, and so on).
    I agree with Spiro. Rod knock is typically caused by some form of lubrication failure, likely oil starvation. Keep in mind that since the oil is shared between the turbo and motor, oil starvation while in boost (from oil pickup failure or sloshing, and this is typically while in boost) will also damage the turbo bearings, shaft, and seals in extreme scenarios. Windage, cavitation, and other internal fluid disturbance may also cause rod bearing failure without affecting the turbo, so it is a gamble. Either way, it doesn't hurt to check.

    Quote Originally Posted by bomoseh14 View Post
    lol, I just bought my first Wrx, and it has 90k on it. I'm not an expert but it sounds like too much boost?
    Cobb Stage 2 maps are set to ~17psi peak boost on the 2.0L with the TD04L-13T. It is normal.
    2015 CWP WRX STi on order ... But how did I get roped back into an EJ motor?!
    Zax' Shaggin' Wagon Build Thread Now tuned for 99% pure Unicorn Jizz!

    Zach | Moderator -- Mid-Atlantic States, Tech & Modifying & General Repairs
    The REAL 'WTF Tuning?!' Progenitor
    Rollin' with the Bugeye Mafia #302 | N.E.R.D. Subject Zero | Blobeye Synd. #Tree-Fiddy
    Facebook me here

    Your Mid-A local board: http://www.clubwrx.net/forums/mid-atlantic-states/

Posting Permissions

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