Pickup 2WD L4-2350cc 2.4L SOHC 8 Valve (1996)
NOTE
(1)
If the engine oil level is low, air is sucked from the oil screen and enters the oil passage.
(2)
If the engine oil level is higher than specification, oil may be stirred by the crankshaft causing the oil to mix with high quantities of air.
(3)
If oil is deteriorated, air is not easily separated from the oil, increasing the quantity of air contained in the oil.
(4)
If air mixed with oil enters the high pressure chamber inside the lash adjuster from the above causes, air in the chamber is compressed
excessively while the valve is open. This results in the production of abnormal noise when the valve is closed. This is the same phenomenon
as that observed when the valve clearance is excessive. The lash adjuster can resume normal function when air that has entered the lash
adjuster is removed.
2.
Idle the engine for one to three minutes to warm it up
3.
Repeat the operation pattern, shown in the illustration, at no load to check for abnormal noise. (Normally the noise is eliminated after 10 to 30
repetitions of the operation.) However, if there is no change in the noise after repeating the operation more than 30 times, the noise is probably
caused by something other than the lash adjuster.
4.
After eliminating the abnormal noise, repeat the operation in the illustration five more times.
5.
Run the engine at idle for one to three minutes to make sure the abnormal noise is eliminated and does not return.
