pääteliitti

Pääteliitti is a Finnish term that translates to "head gasket" in English. It refers to a critical component in internal combustion engines, serving as a seal between the engine block and the cylinder head. Its primary function is to prevent leakage of combustion gases from the cylinders into the cooling system or the crankcase, and to prevent coolant and oil from mixing with the combustion process.

The head gasket is typically made from layered materials, often including steel, rubber, and composite materials, designed to withstand high temperatures and pressures. It must also maintain its seal under varying engine operating conditions, including cold starts and high-load situations. A properly functioning pääteliitti is essential for maintaining engine compression and preventing overheating.

Common causes of pääteliitti failure include overheating, improper installation, engine detonation, and the aging of the gasket material. Symptoms of a failing head gasket can include white smoke from the exhaust (coolant entering the combustion chamber), coolant loss without visible leaks, milky or foamy oil, and engine misfires. If a pääteliitti fails, it can lead to significant engine damage and requires repair or replacement of the component. The repair process involves disassembling the top part of the engine, removing the cylinder head, replacing the gasket, and reassembling the engine.