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I echo what 78F350 mentions regarding the cam deviation readings. Last winter in prep for a bunch of maintenance items, I pulled my pan and saw quite a bit of the shavings that you see. My cam deviations weren't horrible, but based on the scope of maintenance I had planned and the ease of doing the pads with the engine out, I decided to just pull the engine and do the pads at the same time along with everything else. I did have a bit of chain slap on start-up.
I ended up doing all the chain guides and tensioners while it was out with new chains, using the newer tensioners. The long guides from the IMS to the cams had very little visible wear while the cam adjuster pads were toast.
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