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2002
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Navigator 4WD
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Engine System-General Information
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Exhaust Manifold - Inspection
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Procedure
Exhaust Manifold - Inspection: Procedure
Place a straight edge across the exhaust manifold flanges and check for warping with a feeler gauge.
Fig 1: Checking For Warping Of Exhaust Manifold Flanges
Courtesy of FORD MOTOR CO.