I have cleaned dozens of EGR, and i have not been able to move the piston on any of them by hand, i doubt anybody could, remember just cleaning the EGR, will not deal with all the gunk inside the manifold, and on the MAP sensor.
1st one i ever cleaned back in 2011
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1st gutted one 2012
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different assortments
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manifold cleaned inside.
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recent one i exchanged out, for local member.
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MAP sensor clogged one next to a clean one.
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This is what most of your manifolds will have inside.
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They need to be like this.
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