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New Dipsticks With Full Range Readings
The new rear sump and front sump dipsticks are used with their respective oil pans. These oil pans are used in truck applications with set-back axles.The new dipsticks are different because they have a FULL RANGE zone versus other dipsticks that have the traditional FULL mark. These dipsticks are used for truck applications with various angles and slants of engine installation (angle = front to back tilt, slant = sideways tilt).Calibration
Use the following procedure to calibrate FULL RANGE dipsticks. A convenient time to calibrate the dipstick is at the first oil change.Refer to the PM Level 1 of the Maintenance Management Schedule of this publication for the proper oil change interval.To verify the "ADD" mark and establish the actual "FULL" mark, use the following procedure: Truck must be parked on a level surface.1. Operate the engine until it reaches normal operating temperature.2. Stop the engine. Drain the oil and change the oil filter.3. Fill the crankcase with 32 U.S. quarts (30.3 liters) of oil. Brakesaver models require 36 quarts (34 L). Remote mounted or auxiliary filters require additional oil. For all information pertaining to auxiliary oil filters, refer to the OEM or manufacturer's instructions.4. Allow the oil to drain back to the sump for a minimum of five minutes.5. Remove the dipstick. The oil level should be at the ADD mark. If it is not, mark the actual level on the dipstick. This is now the correct ADD mark.6. Add an additional 4 U.S. quarts (3.8 liters) of oil to the sump. Allow enough time for the oil to drain into the sump. Again, check the level on the dipstick.7. This is the correct FULL mark in the FULL RANGE zone on the dipstick. If it is not, mark the new FULL level on the dipstick. Remote mounted or auxiliary filters require additional oil also. For all information pertaining to auxiliary oil filters, refer to the OEM or manufacturer's instructions.8. Start the engine and operate until it reaches normal operating temperature. Stop the engine.9. Allow the oil to drain back to the sump for a minimum of 10 minutes.10. Remove the dipstick. The oil level should be near the FULL mark. If it is not, add oil until the level reaches the FULL mark on the dipstick.This procedure is correct for use with either the non-spacer plate oil pan or the spacer plate oil pan. Sump capacities and oil levels are the same for each oil pan.Any FULL RANGE dipstick for the 3406B Truck engine can be calibrated using this procedure.