WORKHORSE CUSTOM CHASSIS
Service Manual
W SeriesWCC
SECTION
6.2
PAGE
31
Engine Mechanical
W Series Chassis
TOC
© 2006 WorkhorseCustom Chassis — All Rights Reserved
Important: It may be necessary to hold the crankshaft balancer bolt to prevent the crankshaft from rotating.
5. Apply shop air pressure to the J 35667-A and adjust according to the manufacturers instructions.
6. Record the cylinder leakage value. Cylinder leakage that exceeds 25 percent is considered excessive and may require
component service. In excessive leakage situations, inspect for the following conditions:
• Air leakage sounds at the throttle body or air inlet hose that may indicate a worn or burnt intake valve or a broken valve
spring.
• Air leakage sounds at the exhaust system tailpipe that may indicate a worn or burnt exhaust valve or a broken valve
spring.
• Air leakage sounds from the crankcase, oil level indicator tube, or oil fi ll tube that may indicate worn piston rings, a
damaged piston, a worn or scored cylinder bore, a damaged engine block, or a damaged cylinder head.
• Air bubbles in the cooling system may indicate a damaged cylinder head or a damaged cylinder head gasket.
7.Perform the leakage test on the remaining cylinders and record the values.
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