[Shotimes] Rod Bearings/Scratch Head

[SVTSHO (Bill Byrer)]

To clarify, the rod bearings giving you the problem are on the same pistons 
(5/6) that you replaced?  Did you replace just the pistons or the piston and 
rod? Not trying to be a smarts$$, but you got the rods in the same direction 
as they came out and you got the rod caps on correctly?

I am thinking that the problem is with the rods. If you used the old rods, 
the backfire that cracked the pistons, could have damaged or twisted the 
rods. If you used the rods from the parts motor, I would do some careful 
measuring with micrometers and some plastigage.


----- Original Message ----- 
From: "Mike Murphy" <murphymike@hotmail.com>
To: <shotimes@autox.team.net>
Sent: Friday, January 14, 2005 2:35 PM
Subject: [Shotimes] Rod Bearings/Scratch Head


> Here is one I haven't heard of before...sorry for the long story:
>
> On my Supercharged Car the tuning took a dump on me and I backfired 
> through the motor  which hair-line cracked two pistons (5 & 6.)
>
> I replaced the pistons with two from a parts motor.   Present rodbearings 
> looked good and installed/torqued them to spec.   Buttoned her all up.
>
> Fired her up and got a rod bearing knock (insert cuss words.)
>
> I eased her 10 miles over to Texan Tony's house.    Pulled the two rod 
> bearings out and they were almost melted/very coppered.   Luckily the 
> crank was not scored.  Pulled no. 2 bearing out and it was fine.
>
> Tony put in brand new rod bearings on the pistons/assembly lubed etc. 
> Buttoned her up to spec and same rod bearing knock again.
>
> ?????????????????????????????
>
> Thanks mucho,
> Murph
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