Does it matter if the intake pipe of turbocharged throttle is not well sealed?

The engine oil that seeps into the combustion chamber due to lax valve sealing will generally emit blue smoke when discharged. When the valve is used for a long time, it is easy to produce carbon deposit, which leads to lax valve closing and insufficient combustion. At the same time, it will also cause carbon deposition in the combustion chamber and nozzle or blockage of the three-way catalyst. It will also cause the engine power to decrease, the fuel consumption to increase obviously, and the related parts to be damaged, especially the spark plug working condition to decrease obviously. The reason why the valve seal is not tight is that the collision between the valve and the valve seat widens the groove of the working face, especially the exhaust gas is often washed by high temperature gas, and spots and grooves appear on the working face due to oxidation and ablation.