Valve stem seals provide a leak of the oil to keep the valve system lubricated. When the lubrication is in a controlled manner, this helps the valve guide to slide without any harm. Too much oil and it causes carbon buildup; too less of oil, and it causes the stem and guide wear.
For Isuzu FVZ & FVR model trucks with the 6HK1 engine.
This is a Gas Kit for the Isuzu FVM and FTR model truck. A head gasket set may include different types of engine gaskets including an intake gasket, fuel pump block-off gasket, valve cover grommets, fuel line copper washers, thermostat seal, O-rings, and more. They may also come together with a cylinder head bolt set.
The oil pumps primary purpose is to circulate engine oil under pressure to the bearings, pistons and the camshaft. This lubricates these systems, allows the use of higher-capacity fluid bearings and also assists in engine cooling.