How to adjust the valves on an Aowei 11-liter 460 engine?
3 Answers
Adjust the valves on the Aowei 11-liter 460 engine at the compression cylinder. Valve adjustment: First, locate the top dead center of the first cylinder, then adjust the intake valves of cylinders 1, 2, and 4 to 0.3mm. Next, rotate the crankshaft one full turn to the top dead center of the sixth cylinder and adjust the intake valves of cylinders 3, 5, and 6 to 0.30mm. Finally, starting from the exhaust valve of the sixth cylinder, adjust each throttle valve to 3.00mm in the order of 6, 2, 4, 1, 5, and 3, every 120 degrees. Valve adjustment methods: The first method is the sequential cylinder adjustment method. First, loosen the adjustment screw, then use a screwdriver to tighten the threaded shaft. After determining the adjustment position, tighten it again, then adjust the intake and exhaust valve clearances. Proceed to adjust the valve clearances of the other cylinders step by step using this method. The second method is the two-step adjustment method. While adjusting, you can turn the screw and simultaneously insert a feeler gauge between the valve stem end and the rocker arm, moving it back and forth. When slight resistance is felt, use the sequential cylinder method to check and adjust the valve clearance. This method is more precise and saves time and effort, but it requires higher skill from the maintenance personnel.
Adjusting the valve clearance on the Aowei 11-liter 460 engine is something I've done many times. First, make sure the engine is completely cold to avoid thermal expansion affecting the results. Park in a spacious area, open the hood, and remove the valve cover using the appropriate wrench—don't force it or risk damage. The critical step comes next: slowly rotate the crankshaft to position the No. 1 piston at top dead center (TDC) in the compression stroke, using either the starter or a manual wrench. Then, measure the valve clearance with a feeler gauge—typically set between 0.3-0.5mm for standard diesel engines, but always refer to the user manual as specs vary by model. If the gap is too large, loosen the adjusting nut, turn the screw to the correct clearance, and retighten the nut. Don’t rush through all valves at once; adjust one at a time, rotating the engine to the next valve’s position. Patience is key—beginners often fumble, leading to misadjustments. After reassembling the cover, start the engine to test; if ticking persists, readjust. This job often takes an hour—wear gloves to avoid oil stains. Regular valve checks extend engine life, especially before long trips.
I usually do my own car repairs, and adjusting the valves is a basic task. The Aowei engine is diesel, and valve adjustment is similar to other 11-liter models. You need to prepare tools: a feeler gauge, wrench, and screwdriver are enough. Park the car securely and engage the handbrake, then wait for the engine to cool completely before opening the hood. The key is to rotate the engine to the compression top dead center. I prefer using a manual wrench to turn it slowly to avoid damaging the starter. When measuring the gap, insert the feeler gauge between the valve rocker arm and the push rod. The standard value is around 0.4mm, but check your vehicle's manual. If it's too large, loosen the nut and adjust the screw; if it's too small, tighten it a bit. After adjusting one valve, continue rotating the engine to the next point—don't rush. The first time I did this, I forgot to measure all the valves, and the noise got worse. For safety, avoid touching rotating parts—if the engine suddenly starts, it's dangerous. After adjustment, test the car and listen for smooth operation. It's recommended to check every 20,000 kilometers to save on repair costs and improve throttle response.
