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<blockquote data-quote="2strokesteve89" data-source="post: 203694" data-attributes="member: 1670"><p>If you have a dial or digital micrometer, measure the journal diameter of the camshaft in several different spots, if they are all the same you may have a problem with the head, if you have different readings it is the cam but it doesn't rule out a problem with the head.....when that head was cast it was made in one piece after this the cam bearing journals were line bored to specification, then the journal castings are cut in half, thus making each cap a match to that particular journal, if any modifications are made to the mating surfaces of the head or cap the possibility of camshaft damage/seizure is probable as a result. For this reason I would not recomend sanding or changing out a cap with another. When checking for the integrity of the camshaft and journal centerline and clearance issues, I like to install the cam shaft with the caps properly torqued and the camshaft able to spin freely by either removing the valves or the shim buckets. If the camshaft then rotates freely and smoothly without any signs of binding then I feel better about the centerline of the bore and cam shaft true, I would then measure for runout at the end of the cam as well as any up/down movement in the cam, using a dial indicator. Hopefully this will help you out enough to know what your next step is.</p></blockquote><p></p>

[QUOTE="2strokesteve89, post: 203694, member: 1670"] If you have a dial or digital micrometer, measure the journal diameter of the camshaft in several different spots, if they are all the same you may have a problem with the head, if you have different readings it is the cam but it doesn't rule out a problem with the head.....when that head was cast it was made in one piece after this the cam bearing journals were line bored to specification, then the journal castings are cut in half, thus making each cap a match to that particular journal, if any modifications are made to the mating surfaces of the head or cap the possibility of camshaft damage/seizure is probable as a result. For this reason I would not recomend sanding or changing out a cap with another. When checking for the integrity of the camshaft and journal centerline and clearance issues, I like to install the cam shaft with the caps properly torqued and the camshaft able to spin freely by either removing the valves or the shim buckets. If the camshaft then rotates freely and smoothly without any signs of binding then I feel better about the centerline of the bore and cam shaft true, I would then measure for runout at the end of the cam as well as any up/down movement in the cam, using a dial indicator. Hopefully this will help you out enough to know what your next step is. [/QUOTE]

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