Exhaust valve clearances of the first and third cylinders and intake valve clearances of the first and second cylinders (four-cylinder engine)
Valve clearances (six-cylinder engine)
1. Right head, exhaust valves; 2. Right head, inlet valves; 3. Left head, inlet valves; 4. Left head, exhaust valves
Valve clearances 4-cylinder engine (remaining)
IN - intake valves
EX - Exhaust valves
Valve clearances 6-cylinder engine (remaining)
IN - intake valves
EX - Exhaust valves
Valve clearances 6-cylinder engine (remaining) – 2
IN - intake valves
EX - Exhaust valves
1. Disconnect the negative battery cable.
2. On four-cylinder models, disconnect the spark plug wires.
3. On six-cylinder engines, drain the coolant and remove the air filter. Disconnect the rear row spark plug wires and remove the front row spark plug wires and coils.
4. Remove the spark plugs.
5. Remove the head cover.
6. Set the piston of cylinder N1 to the TDC position at the time of the compression stroke.
7. Measure each valve clearance with a feeler gauge.
8. On models with a four-cylinder engine, turn the crankshaft one full turn and align the alignment marks on the crankshaft pulley. Measure remaining valve clearances (see fig. Valve clearances 4-cylinder engine (remaining)).
9. On models with a six-cylinder engine, turn the crankshaft 2/3 turn (240 degrees) clockwise. Measure the specified valve clearances (see fig. Valve clearances 6-cylinder engine (remaining)). Rotate the crankshaft an additional 2/3 turn and measure the remaining valve clearances (see fig. Valve clearances 6-cylinder engine (remaining) – 2).
10. Rotate the crankshaft so that the cam above the valve requiring adjustment is raised.
11. Rotate the valve lifter with the slot towards the spark plug. Install the tool and push the lifter. Squeeze the lifter with the special tool to remove the gasket.
12. Remove the gasket with a small screwdriver or magnet.
13. Measure the gasket thickness with a micrometer.
14. Calculate the required new gasket thickness using the following formula:
N = T + (A – V)
T = old washer thickness
A = valve clearance
N = new washer thickness
V = recommended valve clearance.
15. Install a new gasket and recheck the valve clearance.