Infiniti VH45DE, VH41DE Engine Workshop Manual
Infiniti, Nissan VH45DE, VH41DE Engine Workshop Manual provides a complete guide for servicing and repairing the VH45DE and VH41DE engines. It includes in-depth instructions on engine mechanics, troubleshooting error codes, and detailed wiring diagrams for optimal diagnostics. This manual is essential for understanding the technical components of these engines, offering support for accurate repairs, system adjustments, and electrical troubleshooting to maintain peak engine performance and reliability.
Infiniti (G50): 1989–1996 VH45DE
| Infiniti (G50): 1989-1996 Engine Control System | Download |
| Infiniti (G50): 1989-1996 Electrical System | Download |
| Infiniti (G50): 1989-1996 Engine Mechanical | Download |
| Infiniti (G50): 1989-1996 Accelerator Control, Fuel and Exhaust Systems | Download |
| Infiniti (G50): 1989-1996 Engine Lubrication and Cooling System | Download |
Infiniti (FY33): 1997–2001 VH41DE
| Infiniti (FY33): 1997–2001 Engine Control System | Download |
| Infiniti (FY33): 1997–2001 Electrical System | Download |
| Infiniti (FY33): 1997–2001 Engine Mechanical | Download |
| Infiniti (FY33): 1997–2001 Accelerator Control, Fuel and Exhaust Systems | Download |
| Infiniti (FY33): 1997–2001 Engine Lubrication and Cooling System | Download |
VH45DE and VH41DE engines
Main problems:
Timing chain: Both models can experience premature wear of the timing chain and its tensioners. This wear leads to noise and the risk of failure. Regularly checking and, if necessary, replacing the tensioners and chain will help avoid this problem.
Oil consumption: The VH45DE sometimes experiences increased oil consumption, especially on older models. This is often due to worn piston rings or gaskets. Regular oil changes and checking the level can reduce the risk.
Cooling system problems: On the VH45DE engine, owners have noted problems with the cooling system, which can lead to overheating. It is recommended to check the radiator, hoses and thermostat to maintain optimal engine temperature.
Sensor and electrical problems: Sensors on both engines can fail over time, especially the crankshaft and camshaft position sensors, which can lead to errors and unstable engine operation.
Which engine is more reliable?
In general, the VH41DE is considered slightly more reliable due to its smaller displacement, which reduces the stress on engine components, and a slightly upgraded cooling system. However, both engines can be long-lived if properly maintained.
How to properly maintain:
Regular oil and filter changes every 5-7 thousand km help reduce wear and keep the engine clean.
Checking the cooling system: Change the antifreeze according to the schedule, check the pipes and fluid level.
Timing chain inspection: Considering possible wear, it is recommended to conduct a preventive inspection of the chain and tensioners.
Cleaning and replacing sensors: Regular diagnostics and cleaning of the intake system, especially sensors, will extend the service life and stabilize the engine.
Checking and cleaning injectors: This will help maintain optimal fuel consumption and reduce the risk of overheating.