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2. INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSYWhen you remove the OCV, in addition to the above tests, it may be worth it to also give a quick clean, using non-chlorinated brake clean, or other sensor safe solvent of your choice. Also depending on your oil change intervals, an oil/filter change may also alleviate the issue if it is a debris/sticking issue.
(a) Resistance Inspection
(1) Using an ohmmeter, measure the resistance between the terminals.
Resistance: 6.9 to 7.9ohm at 20C (68F)
(b) Movement Inspection
(1) Connect the battery positive (+) lead to terminal 1 and negative (-) to terminal 2,
and check the movement of the valve.
Confirm the valve moves freely and does not stick in any position.
Foreign objects in the oil can cause subtle pressure leaks in the valve. The pressure leak will cause the cam to advance, this condition will usually set a DTC.
1. INSPECT WATER PUMP ASSY
(a) Visually check the drain hole for coolant leakage.Basically with the belt off, just turn it, try to wobble it back and forth, by hand. There should be no significant amount of play in any direction, without any sticking points or "grittiness" when you rotate/spin the pulley. If you find any excessive play, wobbling, or grinding, you've likely found your culprit (hopefully the only one). Either the pulley is not snug on the water pump (3 bolts hold it on) or the pump bearing/shaft is done and the entire assembly would need to be replaced.
(b) Turn the pulley, and check that the water pump bearing moves smoothly and quietly.