What causes fuel in coolant?
What causes fuel in coolant?
The fuel pressure from the injector rail cast into the head (small hole to the left of the arrow) is far greater than the pressure in the cooling system. When a crack occurs, diesel fuel easily passes into the coolant.
What kind of engine does a Caterpillar 3406E use?
Caterpillar 3406E, C15, & C15 ACERT engines all use the same style cylinder head, injectors, and injector cups (see images 1 & 2 below). The injector on these engines seats directly against the cylinder head casting, not on the injector cup.
Why does my 3406E engine Miss coolant?
If you’re running a C15 or 3406E diesel engine, you may have experienced your engine missing. So, why does that happen? Well, in some cases, it can be caused by coolant entering your engine.
Where is the injector on a 3406E / C15 engine?
Image 1. Complete injector for 3406E / C15 Image 3. Seating surface of injector tip to cylinder head Image 4. Seating surface of injector to head is below the injector cup Image 5. C15 Injector shown installed in the injector cup Image 6. Start of carbon buildup due to leak at injector seat Image 7.
Are there traces of coolant in the cylinder head?
Traces of coolant or leaking coolant around the injector cup. The injector body is worn, warped, or damaged. The cylinder head casting is worn, pitted, or otherwise damaged. The injector hold down bolts were improperly tightened or stretched. Image 1. Complete injector for 3406E / C15 Image 3. Seating surface of injector tip to cylinder head
Caterpillar 3406E, C15, & C15 ACERT engines all use the same style cylinder head, injectors, and injector cups (see images 1 & 2 below). The injector on these engines seats directly against the cylinder head casting, not on the injector cup.
If you’re running a C15 or 3406E diesel engine, you may have experienced your engine missing. So, why does that happen? Well, in some cases, it can be caused by coolant entering your engine.
Image 1. Complete injector for 3406E / C15 Image 3. Seating surface of injector tip to cylinder head Image 4. Seating surface of injector to head is below the injector cup Image 5. C15 Injector shown installed in the injector cup Image 6. Start of carbon buildup due to leak at injector seat Image 7.
Is there coolant in the bottom of the fuel tank?
Not enough in the bottom of the fuel tank that I can see it there. 1st thought is head gasket leaking into the fuel port that feeds the injectors in the head. I pulled the injectors thinking an inj O-ring was leaking, but realized the inj. O-rings do not seal out the coolant there, just the fuel from oil. No coolant in inj. cups/ports visible.
