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is a one-piece forging, while the exhaust valve has a forged head with a welded stem for lock groove hardness. OPERATION VALVES The intake valve allows the air/fuel mixture to enter the combustion chamber. The exhaust valve allows the STANDARD PROCEDURE VALVE AND VALVE SEAT REFACING Fig. 145: Intake & Exhaust Valves 1 - MARGIN
2007 Dodge Nitro R/T 2007 ENGINE 4.0L - Service Information - Nitro
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