S10/T10 Blazer 2WD V6-262 4.3L VIN Z (1994)
EGR Valve: Service and Repair
Port EGR Valve Replacement
EGR Valve
REMOVE
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Air cleaner.
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EGR valve vacuum tube at valve.
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Bolts or nuts.
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EGR valve and gasket from manifold. Discard gasket.
INSPECT
If the EGR passage indicates excessive build up of deposits, the passage should be cleaned Care should be taken to ensure that all loose particles are
completely removed to prevent them from clogging the EGR valve of from being ingested into the engine.
CLEAN
CAUTION Do NOT wash the EGR valve in solvents or degreaser as permanent damage to the valve diaphragm may result.
Sand blasting of the valve is not recommended since this can affect the operation of the valve.
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With a wire wheel, buff exhaust deposits from mounting surface around valve
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Look for exhaust deposits in the valve outlet Remove deposit build up with a screwdriver
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Clean mounting surfaces of intake manifold and valve assembly
INSTALL
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New EGR gasket.
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EGR valve onto manifold.
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Bolts or nuts. Torque to 24 Nm (17 ft.lb).
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Vacuum tube to EGR valve.
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Air cleaner assembly.
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Check operation of EGR system to ensure correct operation.
