Re: Detonation 101

[Len Sabatine <sabatine@epix.net>]

  Deck of piston appears as  a foreign object was rattling around  in that
  hole for a while. Shame we can't see the chamber and Cyl wall . Possable,
  Blackey Carbon's Head shop did  Kama Kazi  Seat and valve work , then
  seat came loose , snapped off valve head and that's all it wrote. Worse ,
  if some hardware slip'd  into the intake , etc. The damage  appears
  mechanical  tho possible ,  the hack'd  AL could have been  torch'd as
  well , IMO. Betcha it killed  lots of mosquitoes when it blew by the lube.
  No question  , the damage is rather final [ 1000 words or less ] .
  Len

> Damage this bad, might be from mechanical failure, ie some part running
> fallind lose in the engine.  Kinda hard to day with out seeing all the
> related bits.
> But, I'd venture that is was detonation,
> While the cool of the piston in general ain't too bad is you look at the
> **front** of the block you'll see where the piston is natural AL.  I'd bet
> money, that the engine detonated, lifted the head even (blew the
> headgasket), and then just started consuming itself.
>
>  http://students.washington.edu/mlui/temp/blown_engine/blown_block1.JPG
>
> Which leads to some interesting points.
> Was this a sudden failure?.
> The final last huray of the engine may have been in seconds, but something
> like trace detonation may have been eating at it for a long time.
>    Nother case of reading plugs might have saved the motor.
> EFI content is that a K/S in it's self is no guarantee.
> Bruce
>
>
> ----------------------------------------------------------------------------
> To unsubscribe from gmecm, send "unsubscribe gmecm" (without the quotes)
> in the body of a message (not the subject) to majordomo@lists.diy-efi.org

----------------------------------------------------------------------------
To unsubscribe from gmecm, send "unsubscribe gmecm" (without the quotes)
in the body of a message (not the subject) to majordomo@lists.diy-efi.org