DD15’s Common Issues FAQ
After 500,000+ miles, you may experience lower oil pressure due to O-rings located on the oil suction manifold hardening and becoming unable to maintain a proper seal. When those O-rings lose their seal and their suction strength, they need to be replaced by dropping the oil pan and replacing all of them.
The common misconception is that the oil pump fails at this mile marker; therefore, many shops suggest replacing the pump when it is really just the O-rings that have gone bad. In fact, in the past, some shops have rebuilt entire engines when it was completely unnecessary. Let us know whenever you are experiencing low oil pressure with your DD15.
OIL LEAKS AROUND FUEL PUMP, AIR COMPRESSOR, OIL COOLANT MODULE AND THE CAMSHAFT HOUSING
These leaks appear when the gaskets around these components lose their seal. The air compressor, fuel pump, oil coolant module and camshaft housing are the most common areas in which oil leaks occur. The sooner these components are resealed, the better. It is also best to use manufacturer spec oil; heavier oils can have a negative impact on your engine, actually causing them to leak faster.
PROBLEMS STARTING UP YOUR DD15 AFTER PM’S
If you notice that you are having trouble starting up your engine after a PM Service, it might be because your system was not properly primed. Therefore, it is important to go to a shop that has a Detroit approved primer. Otherwise, improperly primed engines will experience “no starts” which is particularly dangerous as it can cause damage. This will lead to far more involved and expensive repairs.
DO NOT USE STARTER FLUID
Starter fluid is not recommended by Detroit.
MAINTAIN YOUR CRANKCASE BREATHER
Your crankcase breather is not an ordinary filter. The crankcase breather has a primary task of regulating the pressure in the crankcase as well as cleaning discharged blow-by gases. The blow-by gas produced by the engine passes into the blow-by gas inlet in the crankcase breather housing. It is a multifaceted component and, when it develops issues, it is important to address those problems.
