April 30, 2025

Oil pump 160A.11B.00 of Weichai 6160 diesel engine for ship vessel

Section 1: R6160 Fuel Injector and Fuel Pump

The fuel injector and pump are the most precise component pairs in a diesel engine. Improper use or maintenance, or unclean fuel, may cause the injector needle valve to overheat, deform, or seize. These failures typically lead to increased fuel consumption, reduced power output, high exhaust temperatures, and excessive exhaust smoke.

Section 2: Weichai R6160 Intake and Exhaust Valve Adjustment Chart

(1) For Firing Order: 1-5-3-6-2-4

Cylinder No.	1	2	3	4	5	6
At TDC of Cylinder 1 (Expansion Stroke)	Intake & Exhaust	Intake	Exhaust	Intake	Exhaust	-
At TDC of Cylinder 6 (Expansion Stroke, 360° rotation)	-	Exhaust	Intake	Exhaust	Intake	Intake & Exhaust

(2) For Firing Order: 1-4-2-6-3-5

Cylinder No.	1	2	3	4	5	6
At TDC of Cylinder 1 (Expansion Stroke)	Intake & Exhaust	Exhaust	Intake	Exhaust	Intake	-
At TDC of Cylinder 6 (Expansion Stroke, 360° rotation)	-	Intake	Exhaust	Intake	Exhaust	Intake & Exhaust

Section 3: 6160 Fuel Injection Timing Adjustment

Fuel injection timing significantly affects the engine's power, efficiency, reliability, and emissions. Adjustment procedure:

Remove the high-pressure fuel pipe from cylinder 1 and install a test tube on the delivery valve holder.
Set the fuel pump governor lever to maximum fuel delivery.
Rotate the fuel pump plunger with a screwdriver until fuel appears in the test tube; then stop.
Loosen the cylinder head vent screw and turn the flywheel in the engine's working direction.
When the fuel in the glass tube just begins to rise, stop rotating; the pointer reading indicates the fuel injection start point.
Check each cylinder in sequence according to the firing order (1-5-3-6-2-4 or 1-4-2-6-3-5).

Section 4: Common Faults and Troubleshooting

(A) Engine Fails to Start

No.	Cause Area	Troubleshooting Method
1	Usage
	(1) Battery low	Check battery gravity (1.28–1.30); insulate in winter
	(2) Start lever not in position	Rotate the handle to start position
	(3) Engine under load	Disengage load
	(4) High oil viscosity	Choose appropriate oil or preheat
	(5) Air in fuel system	Bleed air from system
	(6) Water in diesel	Drain water from fuel tank and filters
	(7) Incorrect diesel type	Choose diesel based on season/location
2	Fuel System
	(1) Leaky fuel pipe joints	Tighten connections
	(2) Blocked pipes	Clean or blow through
	(3) Blocked fuel filters	Clean or replace filters
	(4) Injector spray issue	Adjust or replace needle valve parts
	(5) Incorrect injection timing	Adjust per specifications
	(6) Damaged pump/injector	Repair or replace
3	Others
	(1) Valve leakage	Reseat valves and adjust clearance
	(2) Cylinder leakage	Check gasket, tighten bolts
	(3) Broken valve spring	Replace spring
	(4) Piston ring leakage	Replace rings
	(5) Piston seizure	Disassemble and repair
	(6) Water in cylinder	Remove head, drain water, find cause

(B) Engine Cannot Reach Rated Power

No.	Cause Area	Troubleshooting Method
1	Usage
	(1) Low RPM	Adjust to rated speed
	(2) High altitude or temperature	Apply correction factor using power correction chart
2	Fuel System
	(1) Injector fault	Adjust or repair
	(2) Uneven fuel delivery	Adjust or repair pump
	(3) Worn fuel pump	Adjust gear rack or replace plunger
	(4) Blocked fuel filters	Inspect, clean, adjust or replace
	(5) Wrong fuel type	Choose correct grade for environment
	(6) Incorrect timing	Check and adjust
3	Valve Timing
	(1) Dirty air filter	Clean thoroughly
	(2) High exhaust back pressure	Redesign exhaust system
	(3) Valve leakage	Inspect and reseat valves
	(4) Incorrect valve timing	Check and correct timing
4	Other Factors
	(1) Low compression	Adjust or replace piston rings
	(2) Cylinder scuffing	Repair or replace
	(3) Inadequate cooling	Check belts, cooling system
	(4) Poor lubrication	Repair or clean lubrication system