ENGINE
D. LUBRICATING SYSTEM
a. Checking
(A) Engine Oil Pressure
1. Remove the oil pressure switch and install
adaptors and pressure tester.
2. Start the engine and run it until it is warmed up,
and measure the oil pressure both at idling and
rated speed.
3. If the oil pressure is less than the allowable limit,
check the amount of oil, oil filter, oil pump relief
valve, oil passages and oil clearance.
( R e f e r e n c e )
(B) Oil Filter and Relief Va l v e
1. Drain the engine oil and remove the oil filter to
check it.
2. Check the relief valve for dirt, and the seat (2) and
ball (1) for damage.
3. If damaged, replace.
4. Check the free length of spring (3).
5. If less than the allowable limit, replace.
NOTE :
• Install the relief valve cover with the mark up.
(1) Relief Valve Ball (3) Relief Valve Spring
(2) Relief Valve Seat
1.5 to 2.0kgf•m
Tightening Oil presure
14.7 to 19.6N•m
torque switch
10.8 to 14.5ft-lbs
3.3 to 3.7kgf•m
Tightening Relief
32.4 to 36.3N•m
torque cover
23.9 to 36.8ft-lbs
Factory 35mm
Spring free spec. 1.38in.
length Allowable 30mm
limit 1.18in.
more than 49 kPa
Factory
0.5kgf/cm
2
spec.
7.11psi
294 to 441mm
At idle Factory
3.0 to 4.5kgf/cm
2
speed spec.
42.7 to 64.0psi
255kPa
Allowable
2.4kgf/cm
2
limit
35.6psi
Piston
ring
c l e a r a n c
e
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