What is the method for removing and installing valves?
2 Answers
The method for removing and installing valves is: 1. When removing or installing valves, you must first use a special valve spring compressor to compress the valve spring; 2. Then remove or install the valve lock piece or lock pin, and slowly release the valve spring. The removed valves must be marked and arranged in order to avoid damaging the fit between the valve, valve seat, and valve guide. The valve lock pieces or lock pins are very small, so care should be taken not to lose them. The function of the valve is to specifically input air into the engine and exhaust the burned waste gas. In terms of engine structure, it is divided into intake valves and exhaust valves. The function of the intake valve is to draw air into the engine to mix with fuel for combustion; the function of the exhaust valve is to expel the burned waste gas and dissipate heat.
When it comes to valve removal and installation, I must remind you to prepare the tools first: valve spring compressor, socket wrench, new valve stem seals, and cleaner. Before starting, remove the cylinder head, then align the valve spring and press down the compressor, use a small magnet to hold the spring seat, gently remove the lock piece, and be careful not to let the lock piece fly off. After removing the old valve, thoroughly clean the carbon deposits in the valve guide, apply a layer of engine oil to lubricate the new valve stem, install the new seal, and then reassemble in reverse order. When installing the spring, make sure it is pressed into place, and only release the tool after the lock piece is securely fastened. Finally, use a feeler gauge to adjust the valve clearance, otherwise, there will be abnormal noise after ignition. Keep your hands steady throughout the process and avoid tool slippage.
