A steel ribbon-type oil level dipstick is used to check the level of lubricating oil in the engine oil pan. The dipstick is located in a tube attached by a threaded adaptor on the cylinder block to an opening in the oil pan. See Figure 28591 .
1.Turbocharger Oil Drain Fitting
3.Oil Dipstick Tube
Oil Dipstick Assembly Parts Location
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.
Maintain the oil level between the full and low marks 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.
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.
To determine if replacement of the oil dipstick assembly is necessary, perform the following procedure. See Figure 28590 .
Flowchart for Replacement of Oil Dipstick Assembly
Remove the oil dipstick as follows:
Clean the oil dipstick assembly as follows:
To avoid personal injury when blow drying, wear adequate eye protection (safety glasses or face plate) and do not exceed 276 kPa (40 lb/in. 2 ) air pressure.
Inspect the oil dipstick assembly as follows:
Install the oil dipstick assembly as follows: