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Page 268
REPAIR INSTRUCTIONS
Electronic Unit Pump Installation
[221 GP]
TAPPET INSTALLATION
1. Clean the cylinder block at the mounting
surface and bore, if required.
Use only a soft rag and solvent to clean the
cylinder block. Minor fretting at the EUP mounting
surface is acceptable.
2. Generously lubricate the roller tappet with
clean engine oil and carefully install it into
the bore, pushing it down until it contacts the
camshaft lobe. The slot in the roller tappet
MUST be oriented outward to align with the
pin in the bore. Once installed, the roller
tappet should slide freely in the bore.
The tappet guide pins in the EUP bores are
factory-installed in all cylinder blocks and should
not be removed.
PUMP INSTALLATION
1. Install new O-rings on each of the EUP
assemblies.
2. Generously lubricate the EUP O-rings with
clean engine oil and install the No. 1 EUP
into the cylinder block (Figure 296).
Minimize oil above the top O-ring to avoid
weepage of excess oil (trapped above the top
O-ring) onto the cylinder block.
To avoid O-ring damage, the cam lobe must be
positioned with the base circle up prior to
installation of each EUP. Do not use the starter to
rotate the engine; instead, use the flywheel
barring tool.
296
Figure 296 — Unit Pump Installation
3. Reinstall the EUP screws and tighten evenly
to draw the EUP into the cylinder block
(Figure 297). Tighten the screws to the
specified torque, 42 lb-ft (57 N•m).
297
Figure 297 — Tightening Unit Pump Fasteners
4. Repeat steps 1 and 2 to install the five
remaining EUP assemblies.
If an EUP has been replaced with a new unit, the
new unit must be calibrated as described under
Engine Setup and Adjustments in the REPAIR
INSTRUCTIONS section.
5_106_00.bk Page 268 Friday, August 4, 2000 11:17 AM
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