Few questions on reliability

Discussion in 'Technical' started by OzJustin, May 23, 2006.

  1. OzJustin

    OzJustin Member

    Just a quick question or two, or four :p

    1. On average how much life do you get out of stock turbos before having to rebuild/replace? (Assume not running over 12-14psi)
    2. How long does your average VG30DETT engine last before requiring a rebuild etc. (assume regular maintenance and not driven like a race car)
    3. I've been told it's common for zeds to 'crunch' between 3rd and 4th at high rpm, though I'm a bit sceptical..true?
    4. Quick legal question I couldn't find the answer to; suppose you have a zed with near new engine, turbos and FMIC...does this all need to be engineered with a mod plate, or is recording the new engine no. during rego sufficient?

    Thanks in advance
     
  2. Chad_

    Chad_ Well-Known Member

    the zed is just like any other car really...i mean no matter what vehicle your quering about its going to be the same answers....for example if you dont maintain a cooling system efficiently obviously the car will backfire on you in the worst ways...

    no matter wat car your enquiring about it'll be the same answers....
     
  3. OzJustin

    OzJustin Member

    Any more answers
     
  4. minivan

    minivan Guinea Pig Test Monkey

    ok, engine rebuild.. look after it and shell last longer than you
    maybe 2-250kk should be ok if you dont thrash her

    my turbos lasted 105k before the seals went

    no probs on the gearbox.. out of all the poeople i know with these (read lots) i only know of one with the 3rd to 4th prob you speak of
     
  5. d3c0y

    d3c0y Member

    My car crunches 4th on a full power shift - 4th syncro is pretty common for ware.

    Recording the engine number at rego is "enough". It really depends on states and how close you want to follow the rule book but you dont need a mod plate.

    Honestly no zed is not going to be driven hard at some stage in its life. It's a sports car people buy them to drive fast!
     
  6. OzJustin

    OzJustin Member

    Thanks for the replies

    - I've seen many NA's passing the 200 000k mark but little to no TT's so just wanted some opinions.
    - I'm looking at a few zeds and one has around 130 000k's but has been maintained well. Just don't want to buy it and have the turbos die in 6-12months...
    - Like I said I'm sceptical about the gearbox theory. I reckon there's a problem this guys trying to cover up.
    - Any responses to the new engine/turbos/fmic approval question? Edit: Never mind, answered above
     
  7. MikeH

    MikeH smeg

    I hadn't heard of it being a common thing but there may be a lot of fools like me who's owned their Z for a year without even thinking of replacing the clutch fluid. Did it today, afterwards could barely change gears and clutch needed adjusting, musta needed bleeding bad and was probably the cause of my clutch slipping, could easily have been the other way round in causing gears to crunch.
     
  8. MexiCandu

    MexiCandu Grumpy of the Grampians

    You won't see many TTs with high kms because almost without exception the speedos are wound back prior to import. Mine arrived with 51,000 kms on the clock - yeah right!! Needed an engine rebuild within weeks. Having said that these are incredibly tough engines so if they are looked after they should be good for 250,000kms or more. Have someone who knows these cars check it out prior to purchase.

     
  9. IB

    IB ?????

    Mike, I don't think you've completely bled your clutch ...>>

    You shouldn't need to adjust your clutch after bleeding it.
     
  10. IB

    IB ?????

    How long is a piece of string?

    Well looked after turbos can last longer than 200,000km. There are plenty of TT zeds in the US (on twinturbo.net) with over 120,000 miles on the original turbos. There are also a few that didn't make it anywhere near that many miles.

    Once again using the US experiences, well looked after engines can last more 200,000 miles but with the J-Spec TT's we drive in Aus, we never really know how they were treated in Japan. I think redzedmikey is coming up to 300,000kms in his TT, most TT's haven't seen that many km's in Australia.

    Yes, this common and 80% of these can be cured by using Redline gearbox oil (MT-90 or Lightweight Shockproof). My TT zed has done over 100,000km since I used MT-90 to cure my 4th gear crunch.

    In some States the FMIC should in theory be Engineered, a replacement of one engine with the same family of engine (with same capacity) should only require the new engine number recorded.

    Cheers
    Ian
     
  11. OzJustin

    OzJustin Member

    Again thanks for the replies.
    Pretty much reasserted what I was already thinking. It's good to know the engine and turbos have the 'potential' to live on for a fair while yet. It goes without saying that I'd get everything thoroughly checked out prior to purchase.

    Cheers guys
     

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