A steel ribbon-type oil level dipstick may be used to check the level of oil in the engine oil pan. The dipstick is located in a tube attached by a threaded adaptor to an opening in the oil pan. See Figure 20448 .
1. Dipstick Gage
3. Copper Seal
2. Dipstick Tube Assembly
Oil Level Dipstick Location
Snap action dipsticks have locking tangs and an O-ring seal in the tee-handle. A copper sealing ring between the adaptor and dipstick tube insures a tight seal.
Maintain the oil level between the full and low marks or within crosshatch range on the dipstick. Never allow it to drop below the low mark. No advantage is gained by having the oil level above the full mark. Overfilling may cause the oil to be churned by the balance shafts and crankshaft throws, causing foaming or aeration of the oil. Operation below the low mark may expose the pump pickup, causing aeration, loss of pressure and engine damage.
Beginning with engine serial number 06R0794113 Detroit Diesel introduced a new style dipstick. The old style dipstick marked the oil level with two single lines, one for add oil and one for full oil level. The new style dipstick will have a operating range. The operating range is identified by a crosshatch on the dipstick. If the oil meniscus is within this crosshatch range on the dipstick then the oil range is adequate for engine operation. See Figure 45169 .
Crosshatch Design Dipstick
Check the oil level after the engine has been stopped for a minimum of 20 minutes to permit oil in the various parts of the engine to drain back into the oil pan.
Note: Engine oil capacity can vary, depending on the oil pan used and the engine application.
For total oil capacity refer to the engine application manual or contact the Detroit Diesel Customer Support Center.
Dipsticks are normally marked for use only when the equipment the engine powers is on a level surface. Improper oil levels can result if the oil level is checked with the equipment on a grade, or if insufficient time is allowed for oil to drain back to the sump.
The current dipstick adaptor has a thicker wall than the former adaptor and requires a copper seal between the adaptor and the nut on the oil gage tube assembly. See Figure 20448 .
To determine if repair is possible or replacement is necessary, perform the following procedure. See Figure 40608 .
Flowchart for Repair or Replacement of Oil Dipstick Assembly
Precleaning is not necessary.
Remove oil dipstick assembly as follows:
Inspect oil dipstick assembly as follows:
Assemble oil dipstick assembly as follows: