355 Spring Ride Height Adjustment Procedure? | FerrariChat

355 Spring Ride Height Adjustment Procedure?

Discussion in '348/355' started by BrandSB, Jul 16, 2009.

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  1. BrandSB

    BrandSB Karting

    Jun 11, 2008
    236
    Canton, Michigan
    Full Name:
    Steve
    Does the spring height adjustment on the 355's require special tools such as a spanner, etc.? I understand it's a time consuming process...is this due to the tweeking to get all four corners consistent or is it because the access and actual wrenching are difficult?

    Bottom line, is this a reasonable DIY for an experienced home mechanic or should it be relegated to a specialist? I've done some very tricky springs on former BMW's but don't want to make any assumptions here.

    Thanks!
     
  2. saw1998

    saw1998 F1 Veteran

    Jun 8, 2008
    8,237
    San Antonio, Texas
    Full Name:
    Scott
    #2 saw1998, Jul 16, 2009
    Last edited: Jul 16, 2009
    You need the Hill Engineering wrench LNS-01 - order through Ricambi. I would go to a good alignment shop, with a laser alignment/measurement table, so you can be absolutely sure of your height measurements. It might also be a good time for a 4 wheel alignment.

    http://www.ricambiamerica.com/index.php?cPath=600_100042
     
  3. petearron

    petearron Formula Junior
    BANNED

    Jul 1, 2009
    687
    Las Vegas
    Full Name:
    jeff
    Its just time consuming usually the nut is frozen to the rubber sleeves and it makes the spring want to turn as well, I sprayed pb blaster liberally and it helped. To keep the aspect ratio the same as factory concerning rake for front end I went 12 turns down front and 14 rear this lowered the car an inch all around.

    Plan about 40 minutes a wheel.
     
  4. saw1998

    saw1998 F1 Veteran

    Jun 8, 2008
    8,237
    San Antonio, Texas
    Full Name:
    Scott
    Thanks for posting the number of required turns! I always wondered about the ratio, too. Good man!! :)
     
  5. BrandSB

    BrandSB Karting

    Jun 11, 2008
    236
    Canton, Michigan
    Full Name:
    Steve
    Thanks guys,this sounds relatively manageable. I'll order the spanner from Ricambi and will give it a shot. Stay tuned...
     
  6. eulk328

    eulk328 F1 Rookie

    Feb 18, 2005
    2,800
    Full Name:
    F683
    Do you need wrench LNS-01 AND LNS-01A or just LNS-01? Not clear to me looking at the Hill Engineering page. I would tend to think you would need two wrenches.


     
  7. BrandSB

    BrandSB Karting

    Jun 11, 2008
    236
    Canton, Michigan
    Full Name:
    Steve
    Thanks but don't you mean the LNS-01A platform adjuster? I just ordered from Ricambi and they directed me to that spanner for adjusting spring height.
     
  8. Ricambi America

    Ricambi America F1 World Champ
    Sponsor Owner

    LNS01 knocks off the lower (small) ring nut. Once loose, that one should spin pretty easily down the shock. LNS01A moves off the wider upper nut, which compresses or releases the spring.
     
  9. BrandSB

    BrandSB Karting

    Jun 11, 2008
    236
    Canton, Michigan
    Full Name:
    Steve
    Daniel,
    Sorry for my ignorance but......when I ordered today from Mike I understood that the LNS01A was the spanner required to adjust the ride height via the spring. Do I ALSO need the LNS01 to free up the lower nut BEFORE adjusting the spring compression? Maybe I should have ordered both? TIA for clearing up the confusion.

    Steve
     
  10. BrandSB

    BrandSB Karting

    Jun 11, 2008
    236
    Canton, Michigan
    Full Name:
    Steve
    Thanks to Daniel and Ricambi for clarifying the need for BOTH spanners and for completing my order today. Quick response and great support!
     
  11. f355spider

    f355spider F1 World Champ
    Owner Rossa Subscribed

    May 29, 2001
    18,055
    USA
    I have not done this on my 355 yet, but have on my BMW with Bilstein PSS coilovers. Assuming you measure carefully, you will still probably need to adjust each corner at least twice, to get it spot on. So figure 20 minutes per corner, depending on how tight each nut is, then you will need to go for a short around the block drive to settle things, then measure and adjust as needed. After, you may wish to have an alignment, depending on how much you raised/lowered and how recently it was last checked.
     

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