Can the valve clearance of Wuling Hong Guang 1.5 displacement be adjusted without disassembly?

If you can't change it, even if you change it, the price is too high. The computer board needs to be replaced, and the displacement of 1.2 is enough.

Valve clearance

1. Draw a line every 4mm in the radial direction of the valve working face, so that the matching valve can contact with the valve seat. Turn the valve 1/8 ~ 1/4 and take it out. If the pencil line trace has been completely interrupted and the contact is below the center, it means that the seal is good; If some lines are not broken, or the contact position is wrong, it means that the seal is not tight or not ideal and needs to be polished or repaired again. 2. After patting the valve several times on the mating seat, check the working faces of the valve and the valve seat, and a bright and complete halo should appear. The halo position on the valve should be below the center of the working cone, so it is considered that the sealing requirements have been met. 3. Check with the valve seal tester with barometer that the valve group parts are in the assembled state. Press the cylinder of the testing machine tightly at the position of the valve head, so that the joint surface between the end face of the container and the cylinder head (or cylinder block) can maintain a good seal. Then pinch the rubber ball and inflate the air container to make it have an air pressure of 0.6 ~ 0.7 MPa. If the barometer reading does not drop within half a minute, it means that the combination between the valve and the seat is well sealed. The principle of checking and adjusting the valve clearance should be carried out when the valve is completely closed and the valve tappet is in the lowest position. The overhead valve shall measure the clearance between the end face of the valve stem and the rocker arm, and the side valve shall measure the clearance between the end face of the valve stem and the tappet. There are two ways to check and adjust.

Check the adjustment method

1, cylinder by cylinder adjustment method. First, find the compression end point of a cylinder, adjust the gap between the intake valve and the exhaust valve of the cylinder, and then crank the crankshaft one by one according to the ignition order. 2. Twice adjustment method. Taking a six-cylinder engine working in 1, 5, 3, 6, 2 and 4 ignition sequence as an example, the explanation is as follows: ① First, put the piston of a cylinder at the compression end, then the intake and exhaust valves of this cylinder will be adjustable. (2) According to the principle of "two in three rows". That is, the intake valve of the second cylinder and the exhaust valve of the third cylinder must be completely closed at this time, and the adjustment can also be checked. ③ Only one pair of valves can be adjusted at a time for two cylinders with connecting rod shaft diameters in the same plane, so the exhaust valve of the fifth cylinder and the intake valve of the fourth cylinder can also be checked and adjusted. ④ When the piston of the sixth cylinder is at the end of compression, the remaining valves that have not been checked and adjusted must be completely closed. Therefore, all valves of the engine can be checked and adjusted by rotating the crankshaft twice.