Exhaust Manifold Cleaning and Inspection. GMC Truck GMC Suburban

For 1990-2009 cars only

Makes 🢒 GMC_Truck 🢒 1997 🢒 GMC Suburban - 4WD 🢒 Engine 🢒 Engine Mechanical - 7.4L 🢒 Exhaust Manifold Cleaning and Inspection

Measure the alignment or surface flatness of the exhaust manifold flanges, using a straight edge and a feeler gauge. Exhaust manifold surface flatness should not exceed 0.254 mm (0.01 in).
If the flanges or the mating surfaces do not align, the exhaust manifold is warped and must be replaced.