Toyota Tundra Service Manual: Lubrication System

On-vehicle Inspection

ON-VEHICLE INSPECTION

PROCEDURE

1. CHECK OIL QUALITY

(a) Check the oil for deterioration, water contamination, discoloring or thinning.

If the quality is visibly poor, replace the oil and oil filter element (See page ).

2. CHECK ENGINE OIL LEVEL

(a) Warm up the engine, then stop the engine and wait for 5 minutes.

(b) Check that the engine oil level is between the low level and full level marks on the dipstick.

If low, check for leakage and add oil up to the full level mark.

NOTICE:

Do not fill engine oil above the full level mark.

HINT:

A certain amount of engine oil will be consumed while driving. In the following situations, oil consumption may increase, and engine oil may need to be refilled in between oil maintenance intervals.

• When the engine is new, for example directly after purchasing the vehicle or after replacing the engine.
• If low quality oil or oil of an inappropriate viscosity is used.
• When driving at high engine speed or with a heavy load, (when towing, or), when driving while accelerating or decelerating frequently.
• When leaving the idling for a long time, or when driving frequently through heavy traffic.

When judging the amount of oil consumption, keep in mind that the oil may have become diluted, making it difficult to judge the true level accurately.

3. INSPECT OIL PRESSURE

(a) Remove the oil pressure sender gauge (See page ).

(b) Install an oil pressure gauge.

(c) Warm up the engine.

(d) Inspect the oil pressure.

Standard oil pressure:

If the pressure is not as specified, check the oil pump (See page ).

(e) Remove the oil pressure gauge.

(f) Install the oil pressure sender gauge (See page ).