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--------------CHAPTER1 - - - - - - - - - - - - - -
PROBLEM
Low oll pressure
Excessive oil
consumption
Engine tends to
keep firing after
fuel is shut off
Oil pressure warn-
ing light fails to op-
erate
POSSIBLE CAUSES
1. Engine oil level low
2
Wrong grade of oil
3
Blocked oil pump sump
screen
4
Oil pressure relief valve
faulty
5
Oil pump worn
6
Excessive oil pump rotor
and
shaft
assembly
clearance
7
Excessive
connecting
clearance
main
or
rod
bearing
1. Engine oil level too high
2. External oil leaks
3. Worn valves, valve guides
or bores
4. Cylinder
head
gasket
leaking
5. Oil loss past the pistons
and rings
6. Oil cooler leak
1. Air cleaner dirty or
restricted
REMEDY
1. Top up as necessary
2. Drain and refill with correct
grade of oil
3. Clean pump screen
4. Fit new relief valve
5. Renew Oil Pump
6. Overhaul pump
7. Install new bearings inserts
and/ or re-grind crankshaft
1. Reduce oil level
2. Renew gaskets and seals
where necessary. Check
mating
surfaces
for
damage or distortion
3. Renew
4. Renew
gasket.
Check
head
for
damage
or
distortion
5. Renew
rings
and/or
re-bore/ re-sleeve block
as necessary
6. Repair/renew
oil
cooler
assembly
1 . Clean or renew element
2. Oil leak on compressor
2. Overhaul turbocharger
side of turbocharger where
fitted
1. Bulb burnt out
1. Renew bulb
4.
Warning
light
pressure
2.
Renew pressure switch
switch faulty
5.
Warning light circuit faulty
3.
Check and renew wiring
7
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