Section 05 ENGINE (4-TEC)
Subsection 06 (LUBRICATION SYSTEM)
1
R1503motr124A
234
TYPICAL — GTX 4-TEC ENGINES
1. Valve piston guide
2. Valve piston
3. Compression spring
4. Oil pressure regulator plug
2
1
3
4
5
R1503motr372B
TYPICAL — RXP 4-TEC ENGINES
1. Valve piston guide
2. Valve piston
3. Compression spring
4. Compression spring
5. Oil pressure regulator plug
Inspection
Inspect valve piston and valve piston guide for
scoring or other damages.
Check compression spring for free length.
COMPRESSION SPRING FREE LENGTH
NEW NOMINAL 60 mm (2.362 in)
SERVICE LIMIT
50.3 mm (1.980 in)
Replace parts if important wear or damage are
present.
Clean bore and threads in the PTO housing from
metal shavings and other contaminations.
Installation
For installation, reverse the removal procedure.
Pay attention to the following details.
Be careful that the O-ring on plug screw is in place.
Torque plug screw to 12 N•m(106lbf•in) maxi-
mum. Apply Loctite 243 on threads.
OIL PRESSURE PUMP
The oil pressure pump is located in the PTO hous-
ing and is driven by the balance shaft.
Removal
Remove:
– engine oil (refer to OIL CHANGE)
– PTO housing (refer to PTO HOUSING/MAGNE-
TO section)
– coolant pump housing no. 19 and impeller
no. 20 (refer to COOLING SYSTEM section)
– screws no. 21
– oil pump cover no. 22
smr2004-Complete Line Up 245
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