Excessive Valve Lash; Excessive White Smoke - Perkins 1106D Troubleshooting Manual

58
Troubleshooting Section
Refer to the Troubleshooting Guide, "Excessive Valve
Lash".
Failure of the Primary Speed/Timing
Sensor
If the primary speed/timing sensor fails, the engine
will continue to operate using the signal from the
secondary speed/timing sensor on the fuel rail
pump. The secondary speed/timing sensor is less
precise than the primary speed/timing sensor. Timing
differences between the secondary speed/timing
sensor and the primary speed/timing sensor may
cause an increase in fuel consumption.
1. Use the electronic service tool to check for
active diagnostic codes that relate to the primary
speed/timing sensor.
2. If necessary, replace the primary speed/timing
sensor. Refer to Disassembly and Assembly,
"Speed/Timing Sensor - Remove and Install".

Excessive Valve Lash

Note: This is not an electronic system fault.
Probable Causes
•
Lubrication
•
Valve train components
•
Valve lash
Recommended Actions
Lubrication
1. Remove the valve mechanism covers. Refer to
Disassembly and Assembly, "Valve Mechanism
Cover - Remove and Install" for the correct
procedure.
2. Crank the engine and check the lubrication in the
valve compartment. Ensure that there is adequate
engine oil flow in the valve compartment. The
passages for the engine oil must be clean.
Note: Do not run the engine without the valve
mechanism cover.
Valve Train Components
1. Inspect the following components of the valve
train:
This document is printed from SPI². Not for RESALE
•
Rocker arms
•
Valve bridges
•
Pushrods
•
Valve lifters
•
Camshaft
•
Valve stems
•
Rocker shafts
2. Check the components for the following conditions:
abnormal wear, excessive wear, straightness,
and cleanliness. If necessary, use new parts for
replacement.
Note: If the camshaft is replaced, new valve lifters
must also be used.
Valve Lash
Adjust the valve lash of the engine. Refer to Systems
i03809014
Operation, Testing and Adjusting, "Engine Valve Lash
- Inspect/Adjust" for the correct procedure.

Excessive White Smoke

Note: Some white smoke may be present during
cold start-up conditions when the engine is operating
normally. If the white smoke persists, there may be a
fault.
Probable Causes
•
Coolant temperature sensor circuit
•
Low coolant temperature
•
Glow plugs
•
Fuel quality
•
Valve lash
• Low compression (cylinder pressure)
• Individual malfunctioning cylinder
Recommended Actions
Coolant Temperature Sensor Circuit
1. Connect the electronic service tool to the
diagnostic connector.
KENR6201-01
i03447260