1. DD Engine oil change

2. DD Engine oil change procedure
Oil and filter changes seem like a pretty straight forward operation, but you can make some serious errors that can lead to catastrophic engine failures NOT covered by warranty
Choosing a good service provider or training your own personnel to do the job correctly is vital
Once a tech understands the important points of the operation, he will find the process easy to perform in a professional fashion

3. DD Engine oil change
Don’t do the fuel filters, engine oil and oil filters all at once.
When you change the fuel filters, you must run the engine RPM up to clear the air out of the fuel. That’s terrible on a dry oil system
One visit, two events: Change the fuel filters and run the engine. Then change the oil and oil filters

4. DD Engine oil change
Clean the oil filter cap and surrounding area so you don’t knock any dirt into the filter housing.
Loosen the oil filter cap completely. That allows the valve to open in the bottom of the filter housing and the dirty oil to run into the pan
Drain the oil
Pull the filter
On some chassis, the air filter interferes with oil filter removal. May have to loosen the air filter housing for access
VISUALLY INSPECT THE INSIDE OF THE FILTER HOUSING TO MAKE SURE YOU DID NOT KNOCK ANY DIRT INTO THE OIL FILTER HOUSING

7. Inspect filter bypass valve in filter housing
Good Valve
Bad Valve

8. DD Engine oil change Use the correct filter!
Manufacturers cannot call out brand name on filters. It’s against the law. They can state their part number or “equivalent”
Hengst Filters sold by Detroit Diesel or Freightliner meet the specs
Donaldson filter that are a re-boxed Hengst filter meet the spec
Some “name brand” filters DO NOT meet the specs and may cause serious engine damage not covered by warranty
MBE 4000 filters will fit the housing but are not approved

9. Detroit / Hengst brand is not the only acceptable DD oil filter
The Hengst design filter is protected by a US patent
Equivalent Reboxed or Rebranded oil filters should have the Hengst patent number. (RE38, 917E 6,086,763)
Department

10. DD Engine oil change Drain the oil Refill the oil
Run the engine at idle and check for leaks
Stop the engine for 20 minutes
Check and adjust the oil level

11. DD Engine oil change
If you do the oil and filter changes correctly, you should have a very good chance to live a good life!
However…..

12. DD Engine oil change
When you don’t clean the filter area and knock dirt into the housing, it’s 8” from the dirt on the clean side of the filter to the main bearings

14. DD Engine oil change
The debris get trapped between the crankshaft and main bearing, spins the main bearing and cuts off oil to the rod= rod through block