Does Replacing Valve Stem Seals Count as an Overhaul?

[Rhett]

If the valve stem seals are replaced using cylinder head-on technology, it does not count as an overhaul. However, if the engine cylinder head is disassembled to replace the valve stem seals, then it is considered an overhaul. It is recommended that car owners use cylinder head-on replacement technology to replace valve stem seals. In any case, try to avoid opening the engine cylinder head. Here are the two most common reasons for an automobile overhaul: 1. Insufficient engine oil burning. Engine oil burning usually requires repairs in two areas: the valve stem seals and the piston rings. Valve stem seals are made of rubber and can age over time or wear excessively with high mileage, both leading to poor sealing. 2. Insufficient cylinder compression. Insufficient cylinder compression also necessitates an engine overhaul. Symptoms include severe misfiring and shaking in one of the engine cylinders, as well as poor acceleration. There are several possible causes, with the most common being worn piston rings that fail to seal properly, allowing air leakage during piston compression and preventing sufficient pressure buildup. Another possibility is a bent connecting rod. Additionally, unusual noises inside the engine may also require an overhaul. Such noises are typically caused by severe wear, such as cylinder scoring, bearing failure, or excessive wear on the crankshaft or camshaft. These are very serious faults, and the car cannot continue to run without an overhaul.