Detonation 101

[Bruce Plecan]

cool of the piston
should be
color of the piston



----- Original Message -----
From: "Bruce Plecan" <nacelp at bright.net>
To: <gmecm at diy-efi.org>
Sent: Tuesday, December 12, 2000 11:04 AM
Subject: Detonation 101


>
> 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
>
>
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