Section 04
Diagnostics
Contents
Page
Group 150—Observable Diagnostics and Tests
About this Section of the Manual...........04-150-1
10.5L/12.5L - L1 - Excessive Oil
Consumption ........................04-150-2
10.5L/12.5L - L2 Engine Oil Pressure High . . .04-150-5
10.5L/12.5L Engines - L3 - Engine Oil
Pressure Low........................04-150-6
04
10.5L/12.5L - C1 - Engine Coolant
Temperature Above Normal.............04-150-7
10.5L/12.5L - C2 - Engine Coolant
Temperature Below Normal .............04-150-8
10.5L/12.5L Engines - C3 - Coolant in Oil
or Oil in Coolant......................04-150-8
Dynamometer Test .....................04-150-9
Engine Oil Consumption ................04-150-10
Check Engine Oil Pressure ..............04-150-11
Check for Excessive Engine Crankcase
Pressure (Blow-By) ..................04-150-12
Check for Turbocharger Oil Seal Leak .....04-150-13
Inspect Thermostat and Test Opening
Temperature .......................04-150-14
Pressure Test Cooling System and
Radiator Cap .......................04-150-15
Check for Head Gasket Failures ..........04-150-17
Check Intake Manifold Pressure (Turbo
Boost) ............................04-150-19
Check for Intake and Exhaust
Restrictions ........................04-150-20
Check for Intake Air Leaks ..............04-150-21
Check for Exhaust Air Leaks.............04-150-22
Check Camshaft-to-Crankshaft Timing .....04-150-23
Check Crankshaft Position Sensor Depth . . .04-150-24
CTM100 (06APR04)
04-1
P
OWER
T
ECH
10.5 L & 12.5 L Diesel Engines
040604
PN=1
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