Oil Level Warning System - Checking Procedures
Category 15Applicable Model/s ROTARY ENGINE VEHICLES
Subject
OIL LEVEL WARNING SYSTEM CHECKING PROCEDURES
Bulletin No. 001/84
Issued 3/5/84
Revised
DESCRIPTION
As you know, it is extremely important to maintain the proper oil level on Rotary Engines. It is for this reason that Rotary Engines are equipped with an Oil Level Warning System.
Investigations reveal that the primary reason of Rotary Engine damage is lack of engine oil. Therefore, please inform all Rotary Engine customers to check the oil level every time they stop to refuel and to pay close attention to the Oil Level Warning Light while driving.
It is very important that the Warning System operates properly so that customers can rely on this system.
Please perform the following checking procedure anytime you install a MANA engine and also at times of regularly scheduled maintenance.
Procedure A (1975-77, 1981-84)
Procedure B (1978-80)
OIL LEVEL WARNING SYSTEM CHECKING PROCEDURE - TYPE A
(1975-77, 1981-84)
OIL LEVEL SENSOR (FLOAT TYPE):
FLOAT TYPE
1. Once the oil has been drained from the oil pan, remove the Oil Level Sensor. Check the continuity of the sensor by moving the float up and down.
Fig. 1:
a. When the float is in the "UP" position, the ohmmeter should not show any continuity. (fig. 1)
Fig. 2:
b. When the float is moved to the "DOWN" position, continuity should exist. (fig. 2)
If the proper results are not obtained in steps "a" and "b", replace the sensor.
2. Install the sensor and fill the engine with oil.
Fig. 3 - IGNITION SWITCH & KEY ("ON" POSITION"):
3. Turn the ignition switch to the "ON" position, the oil level warning light should come on. (fig. 3)
If the warning light does not turn "ON", the light bulb, fuse and/or the related wiring harness should be inspected and repaired.
4. Start the engine, the warning light should turn "OFF".
Fig. 4:
5. Disconnect the coupler from the sensor and ground the disconnected coupler while the engine is idling. The warning light should turn "ON". (fig. 4)
Fig. 5:
6. After verifying that the warning system is in good working condition, connect the coupler to the sensor. (fig. 5)
OIL LEVEL WARNING SYSTEM CHECKING PROCEDURE - TYPE B
(1978-80)
OIL LEVEL SENSOR (THERMISTOR TYPE):
Fig. 6:
THERMISTOR TYPE
1. Once the oil has been drained from the oil pan, remove the lower hose from the oil cooler and allow any oil in the cooler to drain out. (fig. 6)
Fig. 7:
2. Reconnect the hose to the oil cooler and re-install the oil filter. There should be no oil in the oil pan, oil filter or oil cooler at this time. (fig. 7)
3. Pour exactly 2-1/2 quarts of oil into the engine.
4. Start the engine and maintain the engine speed between 1500 and 2000 rpm.
Fig. 8:
5. The Oil Level Warning Light should turn "ON" within 90 seconds after the engine has been started. (fig. 8)
If not, disconnect the coupler from the Oil Level Sensor and ground the disconnected coupler. Check that the warning light turns "ON" while the engine is idling.
a. If it turns "ON", replace the Oil Level Sensor and repeat the procedures from step 4 and 5.
b. If the light does not turn on, the light bulb, fuse and/or related wiring harness should be inspected and repaired.
6. After verifying that the wiring system is in good working condition, add engine oil to the "F" mark on the dipstick.