What is the method for replacing valve stem seals on BMW N13?
1 Answers
Replacing valve stem seals typically requires removing the engine cylinder head, supporting the valves, and then performing operations such as replacing the valve stem seals. Method for removing valve stem seals: Remove the camshaft and hydraulic lifters, storing them face down. Please note that during the operation, the lifters are not interchangeable. Use a spark plug wrench to remove the spark plugs, adjust the piston of the corresponding cylinder to top dead center, and screw the pressure hose into the spark plug thread hole. Install the spring compression tool onto the cylinder head using a bolt. Adjust the relevant valve to the correct position, lightly tap the valve spring retainer, and remove the valve lock. Use a tool to pull out the valve stem seal. Function of valve stem seals: Prevent engine oil from entering the exhaust pipe and intake pipe, leading to oil loss; prevent the mixing of gasoline and air; prevent engine oil from entering the combustion chamber; prevent exhaust gas leakage. Valve stem seals mainly consist of lock pieces, spring retainers, seals, inner and outer springs, valves, valve guides, valve seats, etc. They are generally made of materials with good heat resistance and oil resistance, with fluororubber being the primary material used.
