Detroit Diesel GHG14 EPA07 Engine Oil Leaks Diagnostics Guide

This instruction show you guide on how to diagnose engine oil leaks for Detroit GHG14 EPA07 10 DDEV engine.

Related Contents:

2024 Detroit Diesel Diagnostic Link DDDL 8.19 8.09 Free Download

Procedures:

Note:Detroit and the Department of Transportation (DOT) define an external fluid leak as a condition where fluids are pooling or leaking onto the ground.

Example of an Oil Leak – Very Wet with Evidence that Fluid Leaks onto the Ground

Example of a Seep – Residue Accumulation on the Surface but Remains on that Surface and Does Not Drip onto the Ground

Note:Block porosity is an immediate issue and does not happen over time. If there were a block porosity concern present, the porosity issue would be evident with a new engine.

Check as follows:

1.Shut off the engine, apply the parking brake, chock the wheels, and perform any other applicable safety steps.

2.Was an oil change recently performed on this vehicle?

2a Yes; check to make sure that the oil filter and drain plug were properly installed and clean any oil presence spilled from the previous service interval.

2b No; Go to step 3.

3.Is oil pooling or leaking onto the ground?

3a Yes; Go to step 4.

3b No; no leaks are present, release the vehicle.Detroit Diesel Diagnostic Link DDDL

4.Check vehicle repair history. Are there any recent repairs that could have resulted in oil spills on the engine that would appear as an oil leak?

4a Yes; examine the oil spill area of the engine to make sure it is not being perceived as an oil leak.

4b No; Go to step 5.

Note : Isolating the exact location can be difficult due to fan blast and road grime that can cause the leaking oil to migrate. Oil leaks tend to move in a downward and rearward direction. Look for the highest point of any oil trace.

5.Inspect the entire vehicle for signs of leaks; note any leaks that may be confused for an engine oil leak. Was the source of the leak identified as being caused by the engine?

5a Yes; Go to step 6.

5b No; Identify the non-engine component causing the leak and refer to the component OEM literature for additional information on troubleshooting/repair of the oil leak.

6Visually inspect the rocker cover gasket starting at the left front of the engine and continue down the left side to the rear of the engine. Is there an external oil leak coming from the rocker cover gasket?

6a Yes; replace the rocker cover gasket.

6b No; Go to step 7.

7.Visually inspect the Camshaft Position (CMP) sensor for sign of external oil leaks. Is there an external oil leak coming from the CMP sensor?

7a Yes; replace the O-ring on the CMP.

7b No; Go to step 8.

8.Visually inspect the camshaft housing seal, starting at the front left and continuing down the left side to the rear. Pay special attention to the rear corner; leaks are hard to see in this area. Are there any external oil leaks coming from the cam frame housing seal?

8.a Yes; replace the cam housing seal.

8b No; Go to step 9.

9.Visually inspect the cylinder head gasket, starting at the left front of the engine and continuing down the left side to the rear of the engine. Keep in mind that the oil supply ports are at the front and the rear of the cylinder block. Are there any external oil leaks coming from the cylinder head gasket?

9a Yes; remove the cylinder head and inspect the head gasket oil supply and return seals for damage.

Repair as necessary.

9b No; Go to step 10.

1 Oil Pan Gasket

2 Crankshaft Seal (behind damper)

3 Oil Gallery Cup Plugs

4 Cylinder Head Gasket

5 Rocker Cover Gasket

6 Camshaft Housing Cup Plugs (behind crossover pipe)

7 Camshaft Housing Seal

8 Front Cover Seal (behind damper)

10.Is oil leaking from the front of the engine?

10a Yes; Go to step 11.

10b No; Go to step 14.

11.Visually inspect the camshaft housing cup plugs (behind the crossover pipe) (3). Are there any external leaks present?

11a Yes; repair as necessary.

11b No; Go to step 12.

12.Visually inspect the oil gallery cup plugs (5) in the cylinder block. Is there any external leaks present?

12a Yes, repair as necessary.

12b No; Go to step 13.

13Looking behind the damper inspect for a leaking front cover seal (6) or a leaking crankshaft seal (7). Is either seal leaking?

13a Yes; repair as necessary.

13b No; Go to step 41.

1 Cylinder Block Cover Plate (if equipped)

2 Camshaft Housing Seal

3 Cylinder Head Gasket

4 Rocker Cover Gasket

5 Turbo Oil Supply and Return

6 Oil Pan Gasket

7 Right Oil Drain Plug

8 Crankcase Breather and Tube

14.Is oil leaking from the right side of the engine?

14a Yes;Go to step 15.

14b No; Go to step 22.

15.Inspect the right side oil drain plug (6). Is there an oil leak present at the oil drain plug?

15a Yes; repair as necessary.

15b

No; Go to step 16.

16.Inspect the crankcase breather (4). Check for leaks at the inlet and outlet tubes, fittings, the mounting surface to the cylinder block, and the housing to cap seal. Are there any external oil leaks present?

16a Yes; Refer to section “High Crankcase Pressure” .

16b No; Go to step 17.

17.Is oil leaking at the boost pipe?

17a Yes; inspect for loose clamps, seeping, worn or damaged boost pipe, and for a dirty air filter. Then go to step 20

17b No; Go to step 18.

18.Is this vehicle equipped with an Axial Power Turbine (APT)?

18a Yes; Go to step 19.

18b No; Go to step 21.

19.Remove the APT heat shield.

20.Inspect the APT and related parts for leaks. Inspect around the oil supply and drain lines, between the APT and the APT gearbox sealing surface, and around the sealing surface of the APT gearbox and the cylinder block. Are there any external oil leaks present?

20a Yes; repair as necessary.

20b No; Go to step 21.

21.Inspect the turbocharger assembly and related parts.

Check for leaks at the inlet and outlet pipes, oil supply and drain lines, the speed sensor, speed sensor O-ring, and around the sealing surface between the turbocharger assembly and the exhaust manifold. Are there any external oil leaks present?

21a Yes; repair as necessary.

21b No; Go to step 41.

1 Oil Pan Gasket

2 Oil Thermostat Cover Plate Seal

3 Oil Coolant Module (see 13TS-10)

4 Injector Harness Grommets

5 Rocker Cover Gasket

6 High Pressure Transfer Line Seals

7 Cam Position Sensor O-ring

8 Camshaft Housing Seal

9 Cylinder Head Gasket

10 High Pressure Pump Mounting Seal

11 Oil Gallery Cup Plug between High Pressure Pump and Air Compressor

12 Air Compressor Mounting Seal

13 Power Steering Pump Mounting Gasket

14 Left Oil Pan Plug

22.Is oil leaking from the left side of the engine?

22a Yes; Go to step 23.

22b No; Go to step 36.

23.Inspect the left side oil pan plug (11). Is there an oil leak present at the oil pan plug?

23a Yes; repair as necessary.

23b No; Go to step 24.

24.Visually inspect the oil pressure and oil temperature sensors for sign of external oil leaks. Leaks can be present at the sensors or O-rings. Is there an external oil leak coming from either sensor?

24a Yes; repair as necessary.

24b No; Go to step 25.

25.Visually inspect the injector harness grommets (1). Are there any external leaks present?

25a Yes; replace the injector harness grommets.

25b No; Go to step 26.

26.Visually inspect the high pressure fuel injector line seals for each cylinder. Are any of the high pressure fuel injector line seals leaking?

26a Yes; replace the high pressure fuel line injector line seal(s) that are leaking.

26b No; Go to step 27.

Note : When inspecting the oil coolant module, consider that oil is sometimes spilled around the filler neck and oil filter cap area during service intervals. These spills can sometimes lead to misdiagnosis.

27.Inspect the oil coolant module. Check for leaks at the oil fill neck, oil filter cap, the oil thermostat cover, the plugs, and around the sealing surface between the oil coolant module and the cylinder block. Are there any external oil leaks present?

27a Yes; repair as necessary.

27b No; Go to step 28.

28.Inspect the oil dipstick tube. Are there any external oil leaks present?

28a Yes; repair as necessary.

28b No; Go to step 29.

29.Inspect the cylinder block oil gallery cup plug located two inches under the HPFP. Is there an external oil leak at the cup plug?

29a Yes; replace the cup plug. Refer to section “Replacement of the Oil Gallery Cup below the High Pressure Fuel Pump” .

29b No; Go to step 30.

30.Check for leaks at the High Pressure Fuel Pump (HPFP). Are there any external oil leaks at the HPFP weep hole or where the HPFP (8) mates to the engine block?

30a Yes; Go to step 31.

30b No; Go to step 33.

Note : HPFP built with the old production cam seal should not be replaced due to groove camshafts. The new service seal changes the seal point on the HPFP camshaft away from the possible groove point. The new service seal was put into production starting with ESN 201835 on three-filter systems and starting with ESN 205055 on two-filter systems.

31.Remove the HPFP. Use the graphics below to establish which type of HPFP cam seal is installed. Is the pump equipped with an old production camshaft oil seal?

Steel Ring

31a Yes; replace the HPFP camshaft seal, the O-ring, and reinstall the HPFP.

31b No; Go to step 32.

32.Visually inspect the HPFP camshaft seal. Is damage present?

32a Yes; install a new HPFP and mounting O-ring.

32b No; install a new mounting O-ring and reinstall the HPFP.

33.Inspect the air compressor assembly; check for oil leaks at the compressor’s cup plug. Are there any external oil leaks present?

33a Yes; replace the air compressor.

33b No; Go to step 34.

34.Inspect the air compressor flange where it mates to the cylinder block. Is there an external oil leak present?

34a Yes; remove the air compressor, clean the area, replace the O-ring, and reinstall the air compressor.

34b No; Go to step 35.

35.Inspect the seal between the air compressor and the power steering pump. Is there an external oil leak present?

35a Yes; remove the power steering pump, replace the seal, and reinstall the power steering pump.

35b No; Go to step 41.

1 Oil Pan Gasket

2 Access Plate for #3 Idler

3 Cylinder Head Gasket

4 Camshaft Housing Cup Plugs

5 Rocker Cover Gasket

6 Camshaft Housing Seal

7 Access Plate for #5 Idler

8Rear Crank Seal (behind flywheel)

9Flywheel Housing Gasket

36.Visually inspect the camshaft housing cup plugs (1). Is there an external oil leak present?

36a Yes; repair as necessary.

36b No; Go to step 37.

37.Visually inspect the camshaft housing seal (3). Is there an external oil leak present?

37a Yes; replace the cam housing seal. Refer to section “Removal of the Camshaft Housing Assembly” .

37b No; Go to step 38.

38.Visually inspect the access plate for #5 idler (4). Is there an external oil leak present?

38a Yes; repair as necessary.

38b No; Go to step 39.

39.Visually inspect the access plate for #3 idler (8). Is there an external oil leak present?

39a Yes; repair as necessary.

39b No; Go to step 40.

40.Visually inspect the flywheel housing for leaks (6). Is there a leak on the lower 6 inches of the flywheel housing?

40a Yes; Go to step 41.

40b No; the oil leak is generated by either the flywheel housing gasket or the rear crank seal. Inspect and repair as necessary. Note : For oil pan gasket warranty submissions, use the image below to mark the location of the leak on the oil pan gasket. When replacing an oil pan gasket, refer to “Installation of the Oil Pan

41.Inspect the oil pan starting at the front of the engine working towards the rear of the engine (7). Is there an external oil leak present?

41a Yes; repair as necessary.

41b No; Refer to section “Engine Oil Leaks – Oil Developer Method” .

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

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