How to Adjust the Valve Clearance of Honda Odyssey 2.4l

Cylinder-by-cylinder adjustment method, that is, after determining the compression top dead center position of a cylinder piston according to the ignition sequence of the cylinder, the gap between the intake valve and the exhaust valve of the cylinder can be adjusted; After adjustment, turn the crankshaft and gradually adjust the valve clearance of other cylinders according to this method.

The valve clearance is determined by the engine manufacturer according to the test. Generally, in the cold state, the intake valve clearance is 0.25mm~0.35mm, and the exhaust valve clearance is 0.30mm~0.35mm.

1, too small: the valve clearance is too small, and the engine may leak air when the valve is not tightly closed in hot state, resulting in power reduction and even burning the valve.

2. Too large: too large valve clearance will cause impact noise between transmission parts and between valve and valve seat, which will accelerate wear. At the same time, it will also reduce the duration of valve opening, and the inflation and exhaust of the cylinder will become worse.

Extended data:

According to different valve positions, there are three types: side valve (SV), bottom valve (OHV) and overhead camshaft valve (OHC). Structurally, the side valve is the simplest. However, due to the poor anti-knock performance and high-speed performance of the engine after adopting this valve form, it can only be used in engines with low compression ratio and low speed, so it is no longer used abroad.

In terms of performance, the overhead camshaft valve is the most ideal, which can meet the requirements of high-power vehicles with high speed and high compression ratio, and has good economy, so it has been widely used.

At present, the structure of the bottom valve is complex, and it is only used in the United States, Italy, the former West Germany (R series motorcycles produced by BMW) and other countries due to production habits.

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