Detroit Diesel EPA07, Workshop Manual

Page: 112 / 442

8.4 INSPECTION OF THE AIR INTAKE MANIFOLD
8.4 INSPECTION OF THE AIR INTAKE MANIFOLD
Inspect as follows:
1. Visually inspect the manifold for any cracks, dents or other damage. Pay particular
attention to the bolt areas.
[a] If a crack is found, replace the intake manifold.
[b] If no cracks are found, reuse the intake manifold.
2. Inspect the manifold mating surface for imperfections that could affect its sealing to
the cylinder head.
[a] If the manifold mating surface has imperfections, replace the intake manifold.
[b] If the manifold mating surface is not damaged, reuse part.
3. Laying a 0.5 cm (20 in) long by 6 mm (1/4 in) wide straight edge across the intake
manifold, check the mating ports surfaces for warping.
[a] If all port fl ange area measurements are less than 0.127 mm (0.005 in), the manifold
is reusable and can be reinstalled with new gaskets.
[b] If the manifold does not meet this requirement, the manifold
must
be replaced.
All information subject to change without notice.
8-8
DDC-SVC-MAN-0081 2010 Copyright © 2010 DETROIT DIESEL CORPORATION