OK now what do the ends of the cam at the break look like? Are they jagged,
some what flat with a dip or rise to opposite side, or are the slightly
tapered with a twist? Is it possible for big end of rod to have hit cam?
What does the cam drive look like? Passing this info on to the valvetrain
experts at work to see if they have seen similar failures on the spin test
machines. Seems odd to me for bottom of lifters knocked out and no bent
pushrods.
Bill
----- Original Message -----
From: "Keith Turk" <kturk@ala.net>
To: <land-speed@autox.team.net>
Sent: Tuesday, February 18, 2003 10:13 PM
Subject: Mule motor parts...
> Well I got the Mule motor out of the Camaro tonight and did the initial
tear
> down to determine why it failed..... I'd suspected a oil system problem
but
> here is what I've found so far....
>
> The oil pan came off even thou it had been hurt really bad by the rod
> slinging around and taking out the Block just above the pan rail... When
I
> removed the oil pan it had Two lobes of the camshaft sitting in it....
> further inspection revealed that the Cam broke right at the # 1 and 2
piston
> rod area.... if your thinking the Rod took it out.... I'm thinking it's
> possible... thou not likely as the rod is left in the bottom of the piston
> and on the crankshaft like the cam came apart and then stuck between the
> block and the rod allowing the rod to break..... I just find it odd that
a
> Carrillo rod which is free on the wrist pin and the crankshaft would break
> in the middle arbitraily.... but stranger things have happened.... oh the
> other thing I noticed was that the rod end on the piston has flared at the
> breaking point like something hit it... ( picture the side of the H beam
> rod being flared out like a V ) The piston is free in the block and the
> portion of the rod on the crank not only spins freely it's got the right
> amount of side play.....
>
> The last thing that might help us solve this mystery is that the push rods
> are straight as an arrow.... but Many of the lifter have the bottoms
punched
> out of them..... so I suppose it's possible that a lifter failed and
stuck
> the cam..... From initial inspection it's hard to see but it looks like
> only 3 of the valves actually hit a piston when the cam quit moving....
>
> Okay that's what I've found so far.... any thoughts from you guys?
>
> Keith ( oh Glen.... hush up.... )( Morning Dan )
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