348 - Piston valve interference question | Page 2 | FerrariChat
Buy

348 Piston valve interference question

Discussion in '348/355' started by Ferrarium, Aug 15, 2021.

This site may earn a commission from merchant affiliate links, including eBay, Amazon, Skimlinks, and others.

Page 2 of 2
  1. GTO Joe

    GTO Joe Formula 3
    Silver Subscribed

    Feb 15, 2013
    1,003
    Charlotte, NC
    Full Name:
    Joseph Troutwine
    #26 GTO Joe, Aug 17, 2021
    So sorry Eric to hear of this setback. If your diagnosis is indeed correct the picture below is what you will find. This is from my engine discovered two months after purchase during its first major. My mechanic blamed the break on a fastener that was not the proper length. In looking at my broken part there is a Helicoil in the bracket and that previous repair may have caused a stress crack to develop to break the part. In any case I dodged a bullet. I was not aware until you pointed out that Hill has a better replacement which I will be doing on my next major. Thanks for the heads up on the new part.
     

    Attached Files:

    SoCal1 likes this.
  2. Ferrarium

    Ferrarium F1 Veteran
    Sponsor Rossa Subscribed

    Jul 28, 2018
    5,728
    Central NJ
    Full Name:
    Eric
    #27 Ferrarium, Aug 17, 2021
    What do they put a sealed plate on the block and do a check as if the heads were there? There has to be a tool for that? A shop is not doing the work I am pulling engine and heads and shipping them off and reinstalling. This is a 5K problem that a shop would charge perhaps 3x for.
     
  3. Ferrarium

    Ferrarium F1 Veteran
    Sponsor Rossa Subscribed

    Jul 28, 2018
    5,728
    Central NJ
    Full Name:
    Eric
    #28 Ferrarium, Aug 17, 2021
    Nope was 2200 rpm or so chatting with wife and went to shift to second and clank clank. At stop light, crossing intersection, clank clank, rolled into gas station on the corner just across the intersection as failure happened mid intersection.
     
  4. johnk...

    johnk... F1 World Champ
    Owner

    Jun 11, 2004
    11,300
    CT
    Full Name:
    John Kreskovsky
    #29 johnk..., Aug 17, 2021
    Exactly. A metal place that bold over one cylinder at a time with a seal and a hole tapped for the necessary fitting. Usually about 1/2"thick plate.
     
  5. Ferrarium

    Ferrarium F1 Veteran
    Sponsor Rossa Subscribed

    Jul 28, 2018
    5,728
    Central NJ
    Full Name:
    Eric
    #30 Ferrarium, Aug 17, 2021
    It tests the piston at the top of the stroke or mid stroke? Seems if there is damage it would be in 1 spot and the rings would need to be over that spot to leak?
     
  6. chas-3

    chas-3 Formula 3
    Silver Subscribed

    Jan 28, 2009
    1,281
    Colorado
    Full Name:
    Chuck
    #31 chas-3, Aug 17, 2021
  7. Ferrarium

    Ferrarium F1 Veteran
    Sponsor Rossa Subscribed

    Jul 28, 2018
    5,728
    Central NJ
    Full Name:
    Eric
    #32 Ferrarium, Aug 17, 2021
    Interesting ok great.

    How the heck do you accurately get +90 degree with the duck foot on the torque procedure without the Goniometer Tool #95970034?

    An adapter such as this perhaps?
     

    Attached Files:

  8. Ferrarium

    Ferrarium F1 Veteran
    Sponsor Rossa Subscribed

    Jul 28, 2018
    5,728
    Central NJ
    Full Name:
    Eric
    #33 Ferrarium, Aug 17, 2021
Page 2 of 2

Share This Page