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Try not, Do or Do not
Join Date: Apr 2004
Location: Fallbrook, Ca. 92028
Posts: 14,224
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The rocker shafts at rest measure about 17.97mm.
Fully tightened they grow to just over 18.16 mm
The difference between conical ends can be as much as .09mm depending on manufacturer.
By tightening the bolt from 160 in/lb to 180 in/lb you get an increase of about .025 mm. It';s not a lot but sometimes it's enough.
I have seen cam housings expanded so far that no amount of torque would set the shaft.
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