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KRYOTEC ENGINE
11
CONDITION
POSSIBLE CAUSES
CORRECTION
6. Turbocharger leaking oil to
the air intake.
6. Inspect the air ducts for evidence of oil transfer.
Repair as required (slight oil residue is normal).
COMPRESSION
KNOCKS
1. Air in the fuel system.
1. Identify location of air leak and repair. Do not
bleed high pressure fuel system.
2. Poor quality fuel or
water/gasoline
contaminated
fuel.
2. Verify by operating from a temporary tank with
good fuel. Clean and flush the fuel tank. Replace
fuel/water separator filter. Replace fuel/water
separator filter.
3. Engine overloaded.
3. Verify the engine load rating is not being
exceeded.
4.
Improperly
operating
injectors.
4. Check and replace misfiring/inoperative injectors.
EXCESSIVE
VIBRATION
1. Loose or broken engine
mounts.
1. Replace engine mounts.
2. Damaged fan or improperly
operating accessories.
2. Check and replace the vibrating components.
3. Improperly operating vibration
damper.
3. Inspect/replace vibration damper.
4. Improperly operating balance
shaft.
4. Inspect/replace balance shaft.
5.
Improperly
operating
electronically controlled viscous
fan drive.
5. Inspect/replace fan drive.
6. Worn or damaged generator
bearing.
6. Check/replace generator.
7. Flywheel housing misaligned. 7. Check/correct flywheel alignment.
8. Loose or broken power
component.
8. Inspect the crankshaft and rods for damage that
causes an unbalance condition. Repair/ replace as
required.
9. Worn or unbalanced driveline
components.
9. Check/repair driveline components.
EXCESSIVE
ENGINE
NOISES
1. Drive belt squeal, insufficient
tension or abnormally high
loading
1. Check the automatic tensioner and inspect the
drive belt. Make sure water pump, tensioner pulley,
fan hub, generator and power steering pump turn
freely.
2. Intake air or exhaust leaks.
2. Refer to Excessive Exhaust Smoke (Refer to
Engine - Diagnosis and Testing).
3. Excessive valve lash.
3. Adjust valves. Make sure the rocker arms are not
bent. Replace bent or severely worn components.
4. Turbocharger noise.
4. Check turbocharger impeller and turbine wheel
for housing contact. Repair/replace as required.
5. Gear train noise.
5. Visually inspect and measure gear back- lash.
Replace gears as required.
6. Power function knock.
6. Check/replace rod and main bearings.