Published On Mar 9, 2020
Wiggle test of Number 5 Intake Valve. This video was taken December 2014, but was published March 2020. The heads were sent back to WCCH at that time. High copper levels in the oil analysis led me to suspect abnormal wear of the first replacement valve guides (made of bronze). I believe the WCCH reworked bronze valve guides are fine because the copper levels in the oil have remained very low.
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