Base Engine Misfire with Coolant Consumption
WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
Base Engine Misfire with Coolant Consumption
| Inspection |
Action |
| DEFINITION: Base engine misfire with coolant consumption |
| Preliminary Inspection |
Verify that there are no external coolant leaks. Refer to Loss of Coolant
in Engine Cooling. |
| Isolate Affected Cylinders |
- Cylinder balance test with scan tool
- Cooling system pressurization
- Inspection of glow plugs
- Compression test
- Cylinder leakdown test
|
| EGR System Inspection - if equipped |
- Inspect EGR valve and intake system for evidence of coolant leakage.
- Replace the EGR cooler if any problem is found.
|
| Injector Tube Leakage |
- Remove the injectors and injector tubes of affected cylinders.
- Inspect for carbon tracking on the tapered seating surface of the cylinder head and the injector tube.
- If evidence of injector tube leakage is found, inspect the tapered sealing surface on the cylinder head and the injector tube for improper machining or debris.
- Clean debris and reassemble, or replace cylinder head or injector tube if necessary.
|
| Cylinder Head Gasket Leakage |
- Remove cylinder heads of the affected cylinder bank and inspect for damage.
- Replace components as necessary.
|
| Cylinder Head or Engine Block Damage |
- Inspect the cylinder heads for cracks and warpage.
- Inspect the cylinder block for damage.
- Inspect the cylinder block to head mating surface for staightness.
- Replace components as necessary.
|