These naturally aspirated, DOHC engines are found in Mustang GT, Mustang Boss 302 and F150 models.
Our experts say that the oil drain back system needs to be reviewed on older engines.
Almost every major OEM has an engine or engine family that uses a variable displacement oil pump controlled by a control spring or ECM to deliver the best possible pressure and efficiency.
This bulletin provides information regarding the proper indexing of the timing marks of the Oil Pump Module during in-vehicle installation on vehicles equipped with Theta four-cylinder engines. If the Oil Pump Module timing marks are improperly indexed, abnormal engine vibration may result. Follow the service information outlined in this bulletin whenever a new or existing Oil Pump/Balance Shaft Module (BSM) is being installed.
Considering how important oil pressure is for all of these reasons, why would anyone take a chance on reusing a high-mileage oil pump when rebuilding an engine?
The CMP actuator system controls the amount of intake and exhaust valve overlap. The engine control module (ECM) can only command the CMP actuator to advance the valve timing from the park position or retard the valve timing back to the park position.
On GM’s newer LT V8s, there is an option for a dry sump lubrication system. Dry sump oiling systems improve lubrication system performance during aggressive driving maneuvers and high cornering loads.
Applicable Vehicles: All models Follow the guidelines outlined in this bulletin to install a new oil pump after an internal engine repair or engine short block replacement. Note: A new or remanufactured engine subassembly (long block) is shipped with a new oil pump already installed, so this bulletin does not apply to the installation of