Frontier XE King Cab 4WD L4-2.4L (KA24DE) (1998)
Vacuum Brake Booster Check Valve: Service and Repair
REPLACEMENT
CAUTION: When installing vacuum hoses, pay attention to the following points.
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Do not apply any oil or lubricants to vacuum hose and check valve.
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Insert vacuum tube into vacuum hose as shown.
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Install check valve, paying attention to its direction.
INSPECTION
Hoses And Connectors
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Check vacuum lines, connections and check valve for airtightness improper attachment chafing and deterioration.
Check Valve
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Check vacuum with a vacuum pump.
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Connect to booster side: Vacuum should exist.
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Connect to engine side: Vacuum should not exist.