Lifter / Lash Adjuster: Testing and Inspection

CHECKING LASH ADJUSTERS CHECK
If an abnormal noise is heard from the lash adjusters (tappets), check as follows;
1. While installed to the cylinder head, press the part where the rocker arm contacts the lash adjuster at the very top. If the adjuster is normal, the part pressed will feel very hard.
2. If it always moves easily downward when pressed, there is a malfunction of the lash adjuster and it should be replaced with a new one.
3. If it feels spongy or elastic, probably oil mixed with air has entered the lash adjuster, so follow the steps below:
^ Check whether the amount of oil is too much or is not enough.
^ Check whether the reason why air is mixed with oil is a damaged oil screen or oil screen gasket. After repairing the cause of the air leak, warm up the engine and then drive the vehicle at low speed for a while. Stop the engine and leave it off for a few minutes; then restart the engine and drive at low speed. Repeat this procedure several times during the course of about one hour so as to remove the air from the oil.