cooling off wrx

Discussion in 'Subaru Impreza' started by GaryG44104, Sep 27, 2003.

  1. GaryG44104

    GaryG44104 Guest

    I have a 04 WRX and love it. I think my dealer told me I should let it run
    to cool off, I take it after more than a short trip. Does this mean with
    the engine running or just the fan?
     
    GaryG44104, Sep 27, 2003
    #1
    1. Advertisements

  2. GaryG44104

    Edward Hayes Guest

    General rule for any engine that is run heavily loaded should be idled for ~
    one minute before shutdown. That lets the exhaust valves cool and the
    turbocharger wind down while it has oil and water circulation. eddie
     
    Edward Hayes, Sep 27, 2003
    #2
    1. Advertisements

  3. GaryG44104

    Jon Guest

    Grats on the car, go easy on the tranny and follow the recommended break-in.

    A good source for question/discussions www.nasioc.com/forums
     
    Jon, Sep 27, 2003
    #3
  4. GaryG44104

    David Betts Guest

    Check your handbook, but as far as I aware this is not necessary from
    the bug-eye cars onwards. which do not rely on oil circulation to cool
    the turbo. The earlier cars have an advisory sticker on the inside of
    the driver's door. Mind you, I'd be tempted to let it run on for a
    minute or so if stopping straight after a period of hard driving. In
    most cases, of course, you'll have been dawdling for a bit in local
    streets before parking up, so no need.

    David Betts
     
    David Betts, Sep 28, 2003
    #4
  5. GaryG44104

    Edward Hayes Guest

    Oil pressure IS required to protect the bearings during spindown.
     
    Edward Hayes, Sep 28, 2003
    #5
  6. GaryG44104

    David Betts Guest

    Of course, but that's not the reason for the one-minute idle
    requirement on the pre-bug eye cars. You'd have to shut down an engine
    remarkable rapidly for oil pressue to fall before the turbo had
    stopped spinning <g>

    David Betts
     
    David Betts, Sep 29, 2003
    #6
  7. GaryG44104

    Mark Guest

    Correct me if i'm wrong...

    I have a 02 WRX. I was told that since the turbo is water cooled (not
    oil) and the turbo sit's lower than the upper most water level, it is
    always surrounded by coolant and will not develop the "cooking" of the
    turdo bearings.

    So in essence you don't have to cool down the turbo. However, on my
    last turbo charged car (91 Plymouth Laser) I had to replace the turbo
    after only 60K miles. Thank god for the Plymouth 7/70 warentee. The
    part alone was $1000. I always give the turbo about 1 minute cool
    down.

    In one of the aircraft I used to fly (Cessna 310) was twin turbo
    charged. We were required to have a 5 minnute cool down period. But
    we flew at a much higher boost pressure. I have to say it was cool to
    look into the engine vent's when flying at night and seeing thoes
    turbos cherry red!
     
    Mark, Sep 29, 2003
    #7
  8. Cessna 310 twin turbo really? The Cessna 310 is normally equiped with single
    turbo engine ( TSIO-520). What is that mod?


    Correct me if i'm wrong...

    I have a 02 WRX. I was told that since the turbo is water cooled (not
    oil) and the turbo sit's lower than the upper most water level, it is
    always surrounded by coolant and will not develop the "cooking" of the
    turdo bearings.

    So in essence you don't have to cool down the turbo. However, on my
    last turbo charged car (91 Plymouth Laser) I had to replace the turbo
    after only 60K miles. Thank god for the Plymouth 7/70 warentee. The
    part alone was $1000. I always give the turbo about 1 minute cool
    down.

    In one of the aircraft I used to fly (Cessna 310) was twin turbo
    charged. We were required to have a 5 minnute cool down period. But
    we flew at a much higher boost pressure. I have to say it was cool to
    look into the engine vent's when flying at night and seeing thoes
    turbos cherry red![/QUOTE]
     
    Philippe Javaux, Sep 29, 2003
    #8
  9. GaryG44104

    Orion Guest

    If it matters I have had 2 CELs and both times were for a misfire in
    cylinder 3. The dealer told me that's the one nearest the turbo and that
    not letting it cool down may cause the misfire. I normally let the car cool
    down for the minute, but on both occasions it happened after I did not. May
    be coincidence, but ever since I let it cool down for at least the minute
    every time and haven't had it happen again. Either way, doesn't hurt,
    unless you're that anal about wasting gas :) For less than a hundred bucks
    you can get a turbo timer that will let you take the keys out and lock the
    car (and arm the alarm) but still keep the engine running for a
    pre-determined time (or in some cases a time determined by how hard the car
    was driven).

    Just my 2 cents.

    A
     
    Orion, Sep 30, 2003
    #9
  10. GaryG44104

    Mark Guest

    Twin turbo ment 1 for each engine.. Sorry, that was lazy
    typing/explaining.

    I actually flew (about 6 years ago) a C310R with RAM engines and q-tip
    props. We then added the vortex generators to the wings and it really
    help the low speed handling. We typicially flew with all tanks (plus
    locker tanks) full of fuel (202 gals). With all the fuel and camera
    gear we were a little over gross.

    Ever try landing a 310 without using ANY flaps? Did it once.. damn
    thing just droped out of the air when we were about 3 feet above the
    runway. OUCH
     
    Mark, Sep 30, 2003
    #10
    1. Advertisements

Ask a Question

Want to reply to this thread or ask your own question?

You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.