How to adjust the valve clearance of TBD236V8 diesel engine

During the use of diesel engines, valve clearances must be checked and adjusted regularly. Here's how:

1. First remove the valve cover, then shake the crankshaft to make the piston at the top dead center position of the compression stroke (the "top dead center" of the flywheel is aligned with the line on the water tank), and close the pressure reducing device. Insert a gauge between the rocker arm head and the end of the valve stem and measure the size of the gap.

2. It is worth noting that it is necessary to measure the valve clearance between hot and cold cars, and compare the measured values with the technical specified values. Generally, when the car is cold, the intake valve clearance is millimeter, and the exhaust valve clearance is millimeter;

3. When the car is hot, the intake valve clearance is millimeters, and the exhaust valve clearance is millimeters, if it does not meet the specified value, it will be adjusted.

4. When adjusting the valve clearance, first loosen the lock nut and use a screwdriver to tighten the adjustment bolt until the clearance is suitable. Then use a screwdriver to adjust the bolt in the top position and tighten the lock nut. Then double-check whether the gap is suitable.

5. However, in the case that the valve rocker arm head has a dimple, when adjusting the valve clearance, it is best to adjust it in the prescribed order until the valve has no clearance, and adjust the pitch of the valve adjustment screw according to the required valve clearance and the approximate number of clearance turns corresponding to the whole screw. This method is more accurate than specifying thickness. The multi-cylinder diesel engine should be adjusted in turn according to the working sequence and valve arrangement.

Remove all the high-pressure oil pipes, and adjust the intake and exhaust valves of the corresponding cylinders when the oil comes out of the oil pump valve when the oil is rising.

The adjustment of the valve clearance should first be carried out under certain conditions: first, the valve is completely closed; the second is, in the cold state of the diesel engine; It will be more accurate to adjust under these two conditions....The method of adjustment, I don't know the specific situation of your diesel, you can take a look at the ejector rod of the valve, turn it, whether it can move, if it can move, the general valve is in a closed state, you can adjust the required clearance according to the manual, after the adjustment screw is adjusted, tighten the nut, and after fixing, the test can be....In short, it is a bit difficult to say it verbally, if there is any doubt, the little brother will do his best...

Open the cover of the governor and observe the cam on the camshaft, the peach tip is on the top and the fast to the top is not adjustable, and the others can be adjusted

Hello, according to your problem description, the solution provided to you here is as follows: 226B4 Diesel Engine Valve Clearance About "What is the Diesel Engine Valve Clearance?" There are the following related contents:

Diesel engine valve clearance is, exhaust valve clearance is. Most of the parameters of the valve clearance are in between, and it is best to adjust the Huifeng in between, and you can refer to the data provided, and then make a decision based on your own experience and the current development trend. Valve clearance profile:

1. The valve clearance is set to ensure the normal operation of the internal combustion engine valve mechanism, because the valve mechanism is in a high-speed state when working, the temperature is high; 2. Therefore, if the valve lifter, valve stem and other parts are elongated after heating, the valve will be automatically opened, so that the valve and the valve seat are not closed tightly, resulting in air leakage; 3. In order to avoid this phenomenon, when designing the valve training mechanism, there is a certain gap between the tail end of the intake and exhaust valve stem and the adjustment screw on the tappet (or rocker arm).

226B4 diesel engine valve clearance is, valve clearance adjustment method: 1, first, open the valve chamber cover, find a suitable preparation tool coil car (manual rotation of the engine), there are generally valve clearance standards on the engine nameplate, such as: intake valve clearance:

Exhaust valve clearance: Prepare the feeler gauge (also known as thick gauge), find two pieces corresponding to your engine, one intake valve and one exhaust valve; 2. Confirm the position of the engine valve, if the valve is not correct, the valve clearance will be wrong. Under normal circumstances, when you adjust it for the first time, you can't find which one is the intake valve and which one is the exhaust valve, at this time, it depends on the exhaust pipe.

For example, if there are two valves in a cylinder, which valve in a cylinder is in the right direction with a cylinder, this one is the exhaust valve, and the other is naturally the intake valve. 3. We use simple and vertical effects"Cylinder-by-cylinder envy keys"Modulation, i.e.:

One cylinder and one cylinder adjustment method. That is, when we want to adjust a cylinder, we turn a cylinder to the position of the top dead center, at this time the valve is in a free state, and the intake and exhaust valves can be adjusted.

4. We manually use the crank tool to turn the engine to the top dead center of a cylinder, look at the valve in the process of rotating, and when we find that there is a gap between the intake and exhaust valves (when the gap is the largest, it will almost reach the top dead center of a cylinder. At this time, you can adjust the valve clearance of a cylinder, loosen the intake valve lock nut of a cylinder, put the appropriate feeler gauge between the valve and the rocker arm, and adjust the lock nut to the gap of the feeler gauge. The same method adjusts the other.

For two or three cylinders, you can adjust it three times.