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02-23 0000-00 Chain upper bush Chain type: single bush Tensioner rail Installed between exhaust Hydraulic tensioner Contains tensioner housing Crankshaft sprocket Teeth: 21 EA Exhaust Camshaft sprocket Teeth: 42 EA Clamping rail Installed between exhaust 7. CHAIN AND GEAR DRIVE SYSTEM D20DTF engine uses single stage chain drive system. Timing chain drives the exhaust side and gear drive the intake side. Timing chain is single bush type. Upper chain drives HP pump connected to intake Camshaft by driving exhaust cam shift sprocke, and lower chain drives oil pump to lubricate the engine. And, MBU (Mass Balance shaft Unit) drive gear drives MBU. Components ▶ Chain lower bush Chain type: single bush Oil pump sprocket Teeth: 20 EA Mechanical type tensioner Operated by internal spring The timing links (gold color) on the timing chain are aligned with the timing marks on the crankshaft sprocket and the camshaft sprocket whenever the crankshaft rotates 8 turns. |