Sensors that monitor oil pressure and oil temperature are common on VVT engines and are a part of system control strategy. Replacing these screens often requires major engine disassembly. Oil pressure is critical, and as bearings wear and develop clearance, pressure will be affected.Įngines are machined with additional oil galleys for VVT and are equipped with one or more fine mesh screens to prevent debris from entering components. Low oil level or the wrong viscosity can result in system slow response codes such as P000A or P000B and possible drive complaints including an illuminated MIL. That means it is imperative that engines are filled to the correct level with clean motor oil of the proper viscosity. Motor oil is the hydraulic medium that makes VVT work. Mechanical, hydraulic and electrical controls have been added to VVT engines. If you are not familiar with these units, it’s time to advance your diagnostic readiness by examining the VVT system, its controls and operation. VVT presents additional diagnostic challenges and repair opportunities to the service industry including new trouble codes. This gives engineers flexibility in improving fuel economy and power while continuing to meet emissions standards. Phasers commonly can be found on just the exhaust cam or on both the intake and exhaust cams.Īlteration of camshaft position changes the cam centerline and the lobe separation angle between intake and exhaust cams. In this hold position, neither chamber receives pressure nor is drained. Figure 2: The oil control valve is the traffic control device of oil pressure.
0 kommentar(er)
