How to Adjust Camry Valve Clearance

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.

When the engine is in use, the valve clearance will change due to the wear of parts, such as the wear of cam, tappet, push rod and rocker shaft, which will make the valve clearance larger, and the wear of valve seat and valve sealing cone will make the valve clearance smaller. If the valve clearance is too large or too small, it should be adjusted to restore the normal clearance. The adjustment of valve clearance is generally carried out when the car is cold.

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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