| Q: Why replace an exhaust manifold on a Cummins 5.9 6BT 12v engine? | 8/6/2024 |
| A: Accoring to the Haynes Repair Manual, most people will only replace the exhaust manifold when it is broken, cracked, leaking or shrunk in length so much that it can't be used. The exhaust manifolds take a lot of heat and generally last a long time. The OEM manifold is not known for good air flow. | |
Q: How much material can you remove from the exhaust manifold mounting surface on Cummins B series or C series engines? | 9/25/2024 |
| A: The Cummins Repair Manual says that the maximum amount of material you can remove from the exhaust manifold mounting surface is .5mm. The mounting surface should have a flatness of .20mm. | |
Q: What is the exhaust manifold bolt spec for a Cummins 6BT engine? | 11/6/2024 |
| A: The Haynes Repair Manual says that the exhaust manifold bolt torque spec is 32 ft-lbs. | |