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I have seen that a couple of times, it's another less>>
Posted by Anders (more from Anders) on Thu, 26 Dec 2002 13:24:09
In Reply to: V6 cam gear failed, Bill7, Thu, 26 Dec 2002 08:14:00
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then perfect solution of the V6 engine.
The front cylinder head is offset a little compared to the rear head (like all V engines) and to get the T-belt sprocket on the same track as the other head, they need to make that sprocket a lot "deeper".
This means a really long bolt is used to reach through the sprocket and into the camshaft.
With that long and skinny bolt, it's of the biggest importance that right torque is used when tightening the bolt.
And it might even be that the designer of the setup have underestimated the forces working on the sprockets.
Since those two sprockets sticks out so far from camshaft and the sprocket surface against camshaft is only about 1 1/2" in diameter. It put tremendous amount of bending force onto that surface and bolt when the engine is running and the timingbelt is tight.
If the bolt is just slightly under tightened, it will allow the sprocket to wiggle on the camshaft and finally break the dowel pin that holds the sprocket timed to the others and crank shaft.
That is just one more thing that a good Saab shop is checking when doing the timing belt replacement.
posted by 66.229.128...
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