G37 Coupe V6-3.7L (VQ37VHR) (2008)
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Check the surface distortion of the exhaust manifold mating surface with a straightedge (A) and a feeler gauge (B).
Limit: Refer to EM-139, "Exhaust Manifold". See: Specifications/Service Limits and General Specifications
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If it exceeds the limit, replace exhaust manifold.