How to Solve Detroit EPA07 GHG14 Engine Excessive Blue Smoke

This instruction show you guide on how to solve excessive black or grey smoke for Detroit EPA07 GHG14 engine .

Preparations:

2024.06 Detroit Diesel Diagnostic Link DDDL 8.20 8.09 Free Download

JPRO DLA+ 2.0 Adapter

NEXIQ USB Link 2 Adapter

 

Procedures:

Check as follows:

Note:Always check the Aftertreatment Device for internal damage when experiencing exhaust smoke.The Aftertreatment Device could be a secondary failure.

1 Perform a crankcase pressure test.

1a Is excessive crankcase pressure is found, Go to step 2.

1b Is excessive crankcase pressure is not found, Go to step 3.

 

2 Perform the relative compression test with DDDL 7.X or higher. Refer to section “Relative Cylinder Compression Test”

2a If relative compression test shows no cylinders with low compression, Go to step 3.

2b If relative compression test reveals a cylinder with low compression, inspect for a worn or damaged cylinder kit. Repair as necessary.

 

3 Check the interior of the exhaust S-pipe (DD15) or the exhaust flanged manifold (DD13) for oil.

3a If oil is found, Go to step 4.

3b If no oil is found, Go to step 7.

4 Remove the turbocharger and inter-stage duct (if equipped), inspect for oil in the exhaust manifold.

For the DD13: Refer to section “Removal of the DD13 Turbocharger”

For the DD15 and DD16: Refer to section “Removal of the DD15 and the DD16 Turbocharger”

4a If oil is found in the inter-stage duct (DD15) or the exhaust flanged manifold (DD13) and none is found in the exhaust manifold, Go to step 5.

4b If no oil is found in the inter-stage duct (if equipped), Go to step 6.

4c If oil is found in the exhaust manifold, Go to step 7.

 

5Inspect the turbocharger for damage.

For the DD13: Refer to section “Inspection of the DD13 Turbocharger”

For the DD15 and DD16: Refer to section “Inspection of the DD15 and DD16 Turbocharger”

5a If the turbocharger is OK, check for air inlet restrictions.

5b If the turbocharger appears to be defective, replace the turbocharger.

For the DD13: Refer to section “Removal of the DD13 Turbocharger”

For the DD15 and DD16: Refer to section “Removal of the DD15 and the DD16 Turbocharger”

 

6 Check pressure output of the Axial Power Turbine (APT) air solenoid using an air pressure gauge. Is the APT air pressure between 3 and 7 psi?

6a Yes; replace the APT. Refer to section “Removal of the DD15 and DD16 Axial Power Turbine”

6b No; if the air pressure is out of specification, change the APT air solenoid.

 

7Remove the exhaust manifold to determine if the oil is coming from one cylinder or multiple cylinders.

7a If oil is coming out of a particular cylinder, check the valve seals, stems, and guides for wear. If the valve seals, stems, and guides are OK, Go to step 8.

7b If oil is coming from multiple cylinders, look in the air inlet and Charge Air Cooler (CAC) pipes for oil from the compressor side of the turbocharger. If no oil is found Go to step 8.

 

8Remove the cylinder head and inspect cylinder(s) for damage. Repair as necessary.

8a For the DD13: Refer to section “Removal of the DD13 Cylinder Head Assembly”

8bFor the DD15 and DD16: Refer to section “Removal of the DD15 and DD16 Cylinder Head Assembly”

 

More repair cases for Detroit Diesel engines,please refer to:Detroit Diesel Engine Repair