What are the symptoms of a bad car cylinder head gasket?
1 Answers
The following are the fault manifestations after the cylinder head gasket is blown: 1. If the engine cylinder communicates with the cooling water jacket or lubricating oil passage, yellow-black oil foam will float on the upper surface of the coolant in the radiator, or there will be obvious water in the oil pan. When these two types of gas channeling are severe, the exhaust will contain water or engine oil. 2. High-pressure gas in the gas-oil passage enters the lubricating oil passage connected between the engine block and the cylinder head. The oil temperature in the oil pan remains high during engine operation, the oil viscosity becomes thin, the pressure decreases, and the oil deteriorates quickly. The oil sent to the upper part of the cylinder head to lubricate the valve train obviously contains bubbles. 3. Gas channeling between two adjacent cylinders: Without opening the decompression, when turning the crankshaft, it can be felt that the pressure in both cylinders is insufficient. When starting the engine, there is a phenomenon of black smoke emission, the engine speed drops significantly, and the power output is insufficient.