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Old Nov 29, 2014 | 02:37 PM
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Default Question on rod side clearances
I just installed my callies crank and compstar rods and noticed that the #1 and #2 and #7 and #8 rods move almost to none side to side ( just by feel ) compared to #3,4,5 and 6 which moves quite a bit more. nothing has been torqued down and rods move freely on the pins. Is this a common problem ?
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Old Nov 29, 2014 | 06:57 PM
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Anyone have any thoughts on this ?
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Old Nov 29, 2014 | 08:28 PM
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Mine were all around .0016 side to side. Tsp forged 408 rotating assembly.
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Old Nov 30, 2014 | 12:01 AM
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Make sure the rods are racing the right way. There should be a bevel around the bearing bore which should face away from the other rod and toward the crank cheek.
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Old Nov 30, 2014 | 07:49 AM
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Question ???
Originally Posted by VandykeT/A
Mine were all around .0016 side to side. Tsp forged 408 rotating assembly.
U mean .016??
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Old Nov 30, 2014 | 08:35 AM
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Originally Posted by KCS
Make sure the rods are racing the right way. There should be a bevel around the bearing bore which should face away from the other rod and toward the crank cheek.
Yes I do, both sides are beveled , a large and small size and I have the large bevel side facing the crank. Like I said, its only on the ends of the crank
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Old Nov 30, 2014 | 09:24 AM
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Bearing shells all the same (narrow) or chamfered uppers/lowers mixed up
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Old Nov 30, 2014 | 09:49 AM
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Originally Posted by A.R. Shale Targa
Bearing shells all the same (narrow) or chamfered uppers/lowers mixed up
bearings don't come cloes enough to the edges. Ive had #1 piston in before, playing with cam timing ( trying to teach this old dog new tricks ) and had no movement problems as far as movement on the crank. It does have very little movement just nothing like #3,4,5, and 6
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Old Nov 30, 2014 | 09:52 AM
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What crank? Stock?
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Old Nov 30, 2014 | 10:09 AM
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Originally Posted by KCS
What crank? Stock?
callies 4inch stroke ( 408 ) and compstar rods
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Old Nov 30, 2014 | 10:17 AM
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Originally Posted by M.BOZZ
callies 4inch stroke ( 408 ) and compstar rods
And you're sure the upper and lower bearing shells aren't mixed? The sides will hang up on the radius of the crank journal if they're mixed up.
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Old Nov 30, 2014 | 10:37 AM
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No, not 100% sure, i was taking my time and i had my coke bottle glasses on,lol i will go back and recheck.Just couldn't see any problem at the time
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Old Nov 30, 2014 | 11:04 AM
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Guessing the Compstar being the budget Callie's probably has .125" radii and not the .140" of stronger higher dollar cranks. If bearing shells are correct then a simple vernier caliper inside cheek to cheek measurement of looser throws compared to tighter throws. Checking if the crank was inconsistently ground. Either a quality cheek re-dressing or rod big end thrust touch up on a belt sander....looking for between .006" and .015" side clearance with .020" being an absolute maximum.
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Old Nov 30, 2014 | 11:24 AM
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If the bearings check out correctly then yes, the belt sander comes out.
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Old Nov 30, 2014 | 02:48 PM
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Yea .016. Tsp told me .016 to .020 was where they ended up usually.
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Old Dec 1, 2014 | 08:25 AM
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Thank you guys, I had the bearings mixed up, lower on upper and so on. side to side measures .017, thanks again
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Old Dec 1, 2014 | 09:02 AM
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Cool, glad you got it figured out. I know I can't say I haven't done that once or twice on accident.
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