I don't give up that easy .
Jim g
Sent from my iPhone
On Jul 25, 2010, at 12:08 PM, n197tr4@cs.com wrote:
> oh Jim,
>
> are you going to make it?
>
> this is the greatest potential turnout of TR4s ever, methinks
>
>
>
> -----Original Message-----
> From: Jim Gray <toodamnfunky@comcast.net>
> To: Triumph Friends of <fot@autox.team.net>
> Sent: Sun, Jul 25, 2010 10:46 am
> Subject: [Fot] Last minute rebuild before Topeka
>
> Greetings FoT
> The worst case scenario has happened. I raced ppir two weeks ago and
> my head gasket blew. I caught it pretty quick and inspection of the
> rod & main bearings
> Showed no damage to the crank. The bearings were just beginning to
> score. The nitriding had paid off.
> Unfortunately when I tore the motor down I found all the pistons
> badly damaged an two of the liners are toast.
> Further investigation showed the small ends of the rods
> Turned blue & red. They were new forged rods and the shop that
> balanced the rotating assembly sized them for the
> Wrist pins, I didn't ask what they were sized to.
> As it is the evidence points to the wrist pins siezing up and
> putting unusual forces on the pistons thus taking out the pistons &
> liners. The holes in the pistons for the wrist pins were beginning
> to oval. So my qestion is, what should be considered a racing
> tollerence for the small end bearing?
> Thanks for any input.
> Jim g
>
> Sent from my iPhone
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