An Engine Vacuum Pump Oil Pipe is a hose that connects the vacuum pump to the engine's oil system, allowing for proper lubrication and function. Used in many diesel engines, such as the Cummins QSB 6.7 in a John Deere 750J bulldozer. In Russian: Трубка масляная вакуумного насоса двигателя (Vakuumnyi nasos maslianoi trubki dvigatelya).

A Rocker Arm Cover Gasket is a seal that prevents oil from leaking from the rocker arm cover (also known as the valve cover), which sits on top of the cylinder head. It's a key engine component in vehicles like the Freightliner Cascadia with a Detroit DD15 engine. In Russian: Прокладка крышки клапанного механизма (Prokladka kryshki klapannogo mekhanizma).

The Cylinder Head is a plate that sits atop the engine block, sealing the cylinders and containing the combustion chambers, intake and exhaust valves, and spark plugs. An essential engine repair part for a Caterpillar 345D excavator's engine. In Russian: Головка блока цилиндров (Golovka bloka tsilindrov).

A Piston Ring is a split ring that fits into a groove on the outer diameter of a piston. It performs three main functions: sealing the combustion chamber, transferring heat from the piston to the cylinder wall, and regulating engine oil. Used in a Volvo VNL truck with a Volvo D13 engine. In Russian: Поршневое кольцо (Porshnevoye kol'tso).

A Connecting Rod is the link between the piston and the crankshaft. It converts the reciprocating motion of the piston into the rotational motion of the crankshaft. A crucial component for the JCB 3CX backhoe's engine. In Russian: Шатун (Shatun).

A Piston Cooling Nozzle is a component that sprays oil onto the underside of the piston crown to cool it and prevent overheating. Found in high-performance engines like the one in a Mercedes-Benz Actros truck. In Russian: Форсунка охлаждения поршня (Forsunka okhlazhdeniya porshnya).

The Engine Oil Filler Cap is a cap that seals the opening on the rocker arm cover where engine oil is added. A simple yet vital part for a Ford F-150 truck with a V8 EcoBoost engine. In Russian: Крышка маслозаливной горловины (Kryshka maslozalevnoy gorloviny).

A Piston Pin (or Gudgeon Pin) connects the piston to the small end of the connecting rod. It is a critical component that transmits force from the piston to the connecting rod. Found in a Case IH Magnum 340 tractor. In Russian: Поршневой палец (Porshnevoy palets).

A Breather Tube (or Crankcase Ventilation Hose) vents excess pressure and gases from the crankcase to the intake system. A critical component for a Scania R730 heavy-duty truck. In Russian: Сапун (Sapoon).

The Engine Block is the foundation of the engine, containing the cylinders, cooling passages, and oil galleries. An integral part of a Caterpillar D8T bulldozer. In Russian: Блок цилиндров (Blok tsilindrov).