Contents: Engine noise on start up lasting… ↧ Noise in the upper part of the… ↧ Noise at the bottom of the engine… ↧ Engine noise under load ↧
Engine noise on start up lasting only a few seconds
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Cause
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Elimination
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Incorrect engine oil or oil of the wrong viscosity was used.
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Incorrect oil filter without anti-drain feature.
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The oil filter bypass valve is worn, damaged or incorrectly installed.
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High leakage through valve tappet.
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The crankshaft thrust bearing is worn, damaged or improperly installed.
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Noise in the upper part of the engine regardless of engine speed
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Cause
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Elimination
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Low oil pressure.
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Insufficient lubrication of valve train components.
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The valve spring is broken.
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The valve stem is worn out, damaged, or there is carbon deposits on the valve seat or stem.
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The valve guide is worn or damaged.
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The valve lifter is worn, damaged or dirty.
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The camshaft lobes are worn or damaged.
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The timing belt and sprockets are worn, damaged, incorrectly installed or poorly secured.
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The timing belt tensioner, if the engine is equipped with one, is worn, damaged or incorrectly installed.
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Noise at the bottom of the engine regardless of engine speed
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Cause
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Elimination
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Low oil pressure.
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Detonation or detonation combustion of the fuel mixture.
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The accessory drive belt is worn, damaged or incorrectly installed - significant cracks, unevenness or missing segments.
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Accessory drive system components are worn, damaged, or improperly installed.
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The crankshaft pulley is worn, damaged or incorrectly installed.
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The engine flywheel is worn, damaged or improperly installed.
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The torque converter is worn, damaged or improperly installed.
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Damaged oil pan, causing it to come into contact with the oil pump strainer – a damaged oil pan may not be properly secured, occupy an incorrect position, or make it difficult for oil to pass through the oil pump strainer, impairing the passage of oil flow to the oil pump.
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Worn, damaged, improperly installed or pinched oil pump strainer - A damaged oil pan may be loose, improperly positioned or restricting oil flow through the oil pump strainer, reducing oil flow to the oil pump.
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Worn, damaged or improperly installed piston – Pistons should be installed according to the marking or indentation on the top surface of the piston that faces the front of the engine. The piston pins should be centered in the connecting rod pin bore.
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Connecting rod bearing is worn, damaged or improperly installed.
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Main bearing is worn, damaged or improperly installed.
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Engine noise under load
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Cause
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Elimination
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Low oil pressure.
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Detonation or detonation combustion of the fuel mixture.
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The engine flywheel is worn, damaged or improperly installed.
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The torque converter is worn, damaged or improperly installed.
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Worn, damaged or improperly installed pistons - Pistons should be installed according to the marking or indentation on the top surface of the piston that faces the front of the engine. Piston pins should be centered in the connecting rod pin bore.
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Connecting rod bearing is worn, damaged or improperly installed.
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Main bearing is worn, damaged or improperly installed.
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The original article can be found on the resource CHEVYMAN.RU
