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Old 19th December 2009, 15:49   #16
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Originally Posted by quattroa4 View Post
what you are saying MCR is good , but in forging you can not place parting line on the camshaft in diametrical axis .
as it is a longitudanal part , the parting line will come along the length ( axially) only.
Yes. The parting line will be along the axis of the shaft. Only then the grain will flow axially and the shaft can withstand the load.

@scuderiamania, I saw the pictures. The damage is because of shock load on the cam shaft. The damage makes this very evident.
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Old 20th December 2009, 18:14   #17
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Can you please explain what shock load is?
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Old 20th December 2009, 22:51   #18
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I've only seen rockers being broken supposedly because of the camshaft.
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Old 20th December 2009, 23:42   #19
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Originally Posted by scuderiamania View Post
I saw both cams were broken. One was broken at two points and the other at one point.
Er... Is the Swift DDiS a twin-cam engine?

Edit: So it is!

Last edited by SS-Traveller : 20th December 2009 at 23:47.
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Old 21st December 2009, 13:31   #20
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as said by MCR its case of shear failure due to sudden impact load , migth be due to the valve itself . very possible . only thing is , should analyse the bearing which the pic is not showing . misalingment of the bearing with either its seat or camshaft must be checked.
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