1. Can the Cummins 6B cracked exhaust manifold be welded?
Yes, you can repair the manifold by welding it, only if the damage is minimal, but if the cracks are big, then you need to replace the exhaust manifold.
Replacing the exhaust manifold will make it durable.
2. Is the exhaust manifold crack common on the Cummins 6B engine?
Yes, a cracked exhaust manifold is one of the common problems of the exhaust manifold. This is mostly due to heat cycles, especially in turbocharger models.
3. Can I use an aftermarket fuel filter, or must I stick to OEM filters?
Yes, you can use an aftermarket fuel filter, in as much as it is of high quality. Some aftermarket filters meet the OEM standard, so such a filter can be used.
4. What are the symptoms of a clogged fuel filter in the Cummins 6B?
These are the symptoms of a clogged fuel filter:
a. Hard starting due to no fuel or low fuel pressure
b. Engine surging under load
c. Rough idling
d. Engine stalling or low engine power.
5. When should I consider sleeving rather than replacing the engine block?
You should go for sleeving if the engine block is still ok or there are minor problems with it. If the only problem is the damaged sleeve, then you should only sleeve.
6. Can sleeving affect the engine durability?
The answer is no. If the sleeving is done by a reliable Mechanic, then you don’t have to worry about the duration.
7. Can a bad piston cooling nozzle cause a problem for the engine?
Yes, a bad piston cooling nozzle will cause the piston to overheat, piston seizure, and damage to the cylinder wall.
8. What causes piston cooling nozzle failure?
Piston cooling nozzles failure are caused by;
a. Contaminated oil
b. Tear and wear
c. Engine overheating.
9. Should I rebuild or replace the engine starter?
The starter can be rebuilt because replacement kits are available. You only have to replace the starter if there are major problems with the starter, such as with the housing.
10. How long can the starter last on the Cummins 6B?
A well-maintained starter can last more than 150,000 miles. The durability depends on the usage, maintenance, and condition of the engine.