What does 'blown bearing' mean?

[ElijahLee]

Blown bearing, also known as smashed bearing, is a colloquial term in the auto repair industry. The standard technical term is connecting rod bearing seizure. Between the engine's connecting rod and piston, as well as between the connecting rod and crankshaft, there are semi-circular bearing shells resembling roof tiles at the circular mating surfaces to accommodate force transmission and lubrication needs. The smaller bearing at the piston end is called the small bearing, while the larger one at the crankshaft end is called the big bearing. Below is an introduction to engine protectants: 1. Engine protectant introduction: Engine protectant, also called engine anti-wear additive, is a maintenance agent that effectively reduces component wear or corrosion, inhibits the formation of deposits like gum and sludge. It forms a protective layer with high compressive strength and excellent wear resistance on metal surfaces, preventing oil oxidation, thickening, and acidification, thereby protecting engine components and extending engine life. 2. Functions of engine protectant: Engine protectants provide anti-wear protection, lubrication, noise reduction, increased engine power, and fuel savings. Some products can also prevent oil burning and have carbon deposit cleaning functions.

[Lane]

In the automotive world, "blown bearing" refers to a severe engine failure where the crankshaft bearings fracture due to insufficient lubrication, high temperatures, or excessive load during operation. I first encountered this issue when repairing an old car—the customer complained about metallic knocking sounds from the engine. Inspection revealed low oil pressure and degraded oil quality, which caused excessive bearing wear. If not addressed promptly, the engine can seize instantly, leading to either a major overhaul or replacement in mild cases, or even causing a serious accident in severe scenarios. The key to prevention lies in regular oil changes, monitoring the oil pressure gauge, and taking action before abnormal noises appear.

[AlessandraMarie]

Last time I was on a long-distance drive, my car suddenly had a bearing failure, with the engine making terrifying clanking noises. I was so scared that I quickly pulled over, and a burnt smell emerged. After inspection, I found out it was because I forgot to change the engine oil, and the bearings were burnt out. The mechanic said that bearing failure means the crankshaft bearings shattered, with the core issue being lubrication problems, compounded by the heavy load from high-speed driving. After the engine was ruined, repairing it was both labor-intensive and expensive, costing me thousands of dollars. Since then, I've developed the habit of servicing my car every 5,000 kilometers, which has made life much easier.

[DeJoseph]

Speaking of 'bearing knock', it's a colloquial term for crankshaft bearing failure, often caused by interrupted lubrication due to aged engine oil or oil pump malfunction. I recommend car owners use high-quality oil and frequently check oil levels, especially testing oil pressure before high-speed driving in summer heat. If you hear metal grinding noises at idle, it might be a warning sign - you should stop the engine immediately to prevent total engine failure.

[MacMadeline]

The most frustrating aspect of bearing failure is the repair cost. A cracked crankshaft bearing typically requires engine disassembly and overhaul, with repair fees ranging from three to five thousand up to tens of thousands depending on the vehicle model. It may also negatively impact used car value. I've learned this is often caused by poor oil quality or prolonged high-RPM operation. The preventive measure is regular maintenance with oil changes – neglecting this to save small money could lead to major losses.