High pressure relief valve

Lubrication system schematic

(1) Unit injector hydraulic pump

(2) High pressure relief valve

(3) Passage to the rocker arms

(4) High pressure oil line

(5) High pressure oil manifold

(6) Passage from high pressure oil manifold to injector

(7) Oil supply line for unit injector hydraulic pump

(8) Piston cooling jets

(9) Cylinder head gallery

(10) Passage to pushrod lifters

(11) Main bearing

(12) Camshaft bearing

(13) Passage to engine oil pan

(14) Main oil gallery

(15) Turbocharger oil supply line

(16) Passage to front housing

(17) Passage to oil pump idler gear bearing

(18) Oil filter bypass valve

(19) Passage to camshaft idler gear bearing

(20) Passage

(21) Engine oil filter

(22) Oil cooler bypass valve

(23) Engine oil cooler

(24) Engine oil pump

(25) Oil pump bypass valve

(26) Auxiliary engine oil filter (if equipped)

(27) Engine oil pan