Chrysler IIIH, Assembly Manual

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Piston Ring Gap Measurement:
Cylinder Bore Cleaning:
Because the piston cooling jets protrude into
the bottom of the cylinder bore, technicians
should consider cleaning the cylinder bores
and oiling them for piston installation before
piston cooling jet installation.
Clean the cylinder bores with clean lint free terry
towels using EF‐411 to ensure cylinder bores are
clean and debris free for continued assembly.
Piston Cooling Jets:
Install the piston cooling jet and torque the fastener
to 6 N∙m (53 in. lbs.).
Piston cooling jets are targeted during manufacture.
Care should be exercised not to damage or bend the
nozzle during handling.
Piston cooling jets have a check valve which closes
below 2.5 bar (35 psi). Piston cooling jets should be
replaced every test.
7
Mar‐16
Piston Ring Gap / Piston Cooling Jets
Sheet 4
Position the top and second piston rings ~ 1 inch
down from the top of the bore. Using a Starrett
Taper Gage Model 270, measure the gap and record
the pre‐test measurement on the appropriate engine
build data form.
Note: Labs perform all ring gap
measurements with the BHJ Torque Plates still
installed on the engine. This view is for illustration
only.
Lubricate the O‐ring on the piston cooling jet with EF‐
411 engine assembly lube.
Revision DRAFT
Short Block Assembly
Section