An Improved Locknut Is Now Used to Tighten the Exhaust Manifolds onto the Cylinder Heads of Certain C15 Engines and C-15 Engines {1059, 7553}
- Engine:
- C-15 (S/N: 9NZ1-UP)
- C15 (S/N: SDP1-UP; MXS1-UP; NXS1-UP)
Description of Change: An improved locknut is now used in order to tighten the exhaust manifold on the engines that are listed above. The improved locknut maintains a more consistent torque on the exhaust manifold and on the cylinder head joint.
Adaptable To:
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| Illustration 1 | g02230295 |
When replacing the exhaust manifold gaskets use the improved 2N-2766 Locknut (1). The torque for the 2N-2766 Locknut is 50 N·m (37 lb ft).
The improved locknut is adaptable back to the first production of the above listed engines.
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| Effective Engine Serial Numbers |
| S/N:9NZ18856-UP |
| S/N:MXS99188-UP |
| S/N:NXS34432-UP |
| S/N:SDP22672-UP |
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