SECTION 10 – ENGINE – CHAPTER 1
10-16
PROBLEM
REMEDY
POSSIBLE CAUSES
Low oil pressure
1.
Engine oil level low
1.
Top up, as necessary
2.
Wrong grade of oil
2.
Drain and refill with correct grade
of oil
3.
Blocked oil pump sump screen
3.
Clean pump screen
4.
Oil pressure relief valve faulty
4.
Fit new relief valve
5.
Oil pump worn
5.
Renew oil pump
6.
Excessive oil pump rotor and shaft
assembly clearance
6.
Overhaul pump
7.
Excessive main or connecting rod
bearing clearance
7.
Install new bearings inserts and /
or re–grind crankshaft if necessary
Excessive oil
consumption
1.
Engine oil level too high
1.
Reduce oil level
consumption
2.
External oil leaks
2.
Renew gaskets and seals, where
necessary. Check mating surfaces
for damage or distortion
3.
Worn valves, valve guides or bores 3.
Renew
4.
Cylinder head gasket leaking
4.
Renew gasket. Check head for
damage or distortion
5.
Oil loss past the pistons and rings 5.
Renew rings and/or rebore/
re–sleeve block as necessary
6.
Oil cooler leak
6.
Repair/renew oil cooler assembly
Engine tends to keep
firing after fuel is shut off
1.
Air cleaner dirty or restricted
1.
Clean or renew element
firing after fuel is shut off
2.
Oil leak on compressor side of
turbocharger where fitted
2.
Overhaul turbocharger
