3000GT VR-4 AWD V6-2972cc 3.0L DOHC MFI Twin Turbo (1998)
<BLEEDING LASH ADJUSTER SYSTEM>
(1) Parking the vehicle on a grade for a long time may decrease oil in the lash adjuster, causing air to enter the high pressure chamber when starting
the engine.
(2) After parking for many hours, oil may run out from the oil passage and take time before oil is supplied to the lash adjuster, causing air to enter the
high pressure chamber.
(3) In the above cases, abnormal noise can be eliminated by bleeding the lash adjuster system.
1. Check the engine oil and add or change oil if required.
NOTE:
(1) If the engine oil level is low, air is sucked from the oil screen, causing air to enter the oil passage.
(2) If the engine oil level is higher than the specification, oil may be stirred by the crankshaft, causing oil to be mixed with a large quantity of air.
(3) If oil is deteriorated, air is not easily separated from oil, increasing the quantity of air contained in oil.
(4) If air mixed with oil enters the high pressure chamber inside the lash adjuster from the above causes, air in the high pressure chamber is
compressed excessively while the valve is opened, resulting in production of abnormal noise at closing of the valve. This is the same
phenomenon as that observed when the valve clearance has become excessive. The lash adjuster can resume normal function when air entered
the lash adjuster is removed.
