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Home >> Pontiac >> 2009 >> G3 Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 86 (Engine Mechanical - 1.6L (LDE, LLU, And LXV) Or 1.8L (2H0) - Description And Operation) >> Description and Operation >> Engine Component Description >> Valve Train

Valve Train

WARNING: This page is about a different car, the 2010 Chevrolet Aveo. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Valve Train Components
GM2049775Courtesy of GENERAL MOTORS CORP.

This valve train system is applied on direct acting type by crankshaft rotation. Intake/exhaust camshaft (2) are drivenand this operation resulting the opening/closing of 2 intake valve/2 exhaust valve (4). This total operation brings out the combustion of cylinder space. VCP is applied for variable cam timing.

Due to systematical characteristics (direct acting type), the tappet can be directly contacted with the cam-profile of camshaft and each different gap between intake valve and exhaust valve with tappet must be maintained. And this valve train system is composed of valve spring, valve stem seal, valve spring retainer and valve key.