Method for Adjusting the Valves of the Teana?

[OGideon]

Here is the method for adjusting the valves of the Teana: 1. Remove the cylinder head covers of the first, second, and third cylinders. Rotate the crankshaft to position each cylinder at top dead center, aligning the groove on the crankshaft pulley with the 0 mark on the first timing belt cover; 2. Check whether the timing marks on the two camshaft timing belt pulleys align with the timing marks on the fourth timing belt cover. If not aligned, rotate the crankshaft 360 degrees. Tighten the bearing cap fastening bolts appropriately in several steps to 19.6 N·m; 3. Inspect the intake valves of the first and fourth cylinders and the exhaust valve of the fifth cylinder. Then rotate the crankshaft 240 degrees and check the exhaust valves of the second and fourth cylinders and the intake valve of the sixth cylinder. Record all measured data exceeding the specified values and identify the valve numbers requiring adjustment of the clearance; 4. Remove the adjustment shims of all valves that need adjustment. To facilitate removal, it is best to position the cam lobes upward and use specialized tools; 5. Measure the thickness of the adjustment shims using a 0–25 mm outside micrometer. Calculate the thickness of the new shims to ensure the valve clearance meets the specified value.

[DeJohn]

I've been repairing Nissan cars for over a decade, and the valve adjustment for the Teana depends on the situation. The newer models all have hydraulic lifters for automatic adjustment, so manual adjustment isn't necessary at all. For older Teana models or after an engine overhaul, manual adjustment is required, and the steps are quite meticulous: First, remove the valve cover, locate the camshaft position, and measure the clearance with a feeler gauge. Typically, the hot engine clearance is around 0.2 mm, and the cold engine clearance is 0.25 mm, but the exact figures should be checked in the repair manual. During adjustment, the crankshaft position must be aligned correctly; otherwise, the clearance won't be accurate. After adjustment, it's recommended to start the engine and listen for any noise—if there's still a ticking sound, it means the adjustment isn't right. The key point is that each adjustment takes two to three hours, and without experience, it's really not manageable. It's best to take it directly to a repair shop.