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Autodoc£27.89Visit shop GLYCO Main Bearings, crankshaft MERCEDES-BENZ,JEEP 72-4725 STD 6510330101,6510330102,A6510101 A6510102,A6510330101,A6510330102
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This main bearing guide is for mechanics and engine builders working with engines that require a standard size crankshaft main bearing. The key benefit is its high-quality construction for reliable engine performance. A caveat is that it's sold as a pair, so ensure you need both components. This Glyco main bearing (part number 72-4725 STD) features a durable bronze-coated steel back and an advanced cathodic sputtering surface treatment for reduced friction and wear. It is unleaded and designed for specific shaft and housing dimensions, ensuring a precise fit.
| Model Part Number | 72-4725STD |
|---|---|
| Brand | GLYCO |
'Standard size' refers to the original equipment manufacturer (OEM) dimensions. This bearing is designed to fit engines without any crankshaft or housing modifications.
This is an advanced coating process that applies a thin, highly durable layer to the bearing surface. It significantly reduces friction and improves wear resistance, contributing to a longer bearing life and smoother engine operation.
Unleaded bearings are preferred in modern engines for environmental reasons and compatibility with advanced lubricant formulations. They often offer superior performance and durability compared to older leaded bearing materials.
This bearing is designed for the specified shaft diameter range (59.94 mm - 59.965 mm). If your crankshaft is worn beyond this tolerance, you may need to have it machined to a different undersize and use corresponding bearings, or have it polished back to standard size if wear is minimal.
Bearing clearance is the small gap between the bearing and the crankshaft journal. It's essential for allowing a thin film of oil to circulate, lubricating and cooling the surfaces. The specified clearance (0.03 mm - 0.1 mm) is critical for proper engine function and longevity.
Main bearings support the entire crankshaft. In most engine rebuilds, all main bearings are replaced simultaneously to ensure uniform wear and performance. This part is sold as a pair to facilitate this common practice.
This could indicate excessive bearing clearance. Re-measure crankshaft and housing diameters, check bearing thickness, and ensure the correct part number is installed. If clearance is still too large, a different size bearing or crankshaft machining may be required.
Check oil supply to the bearings. Ensure correct oil viscosity and pressure. Inspect for contaminants in the oil. Verify installation procedure and cleanliness.
Indicates debris in the lubrication system or during installation. Ensure all engine components and oil passages are thoroughly cleaned before assembly. Use a high-quality oil filter.
Setup: Installation requires professional mechanical knowledge. Ensure the crankshaft and housing surfaces are perfectly clean and free of any debris. The bearing should be carefully seated into the engine block housing, ensuring correct orientation. Lubricate the bearing surfaces with appropriate engine oil before installing the crankshaft.
Compatibility: This is a standard size main bearing (72-4725 STD) designed for specific shaft and housing diameters. Verify your engine's service manual for compatible crankshaft and housing dimensions before purchase. The shaft diameter range is 59.94 mm to 59.965 mm, and the housing diameter range is 64 mm to 64.019 mm. The bearing width is 20.5 mm and thickness is 2.008 mm.
Care: Main bearings are a non-serviceable internal engine component once installed. Proper engine maintenance, including regular oil changes with high-quality oil and adhering to recommended oil change intervals, is crucial for extending the life of these bearings. Avoid engine abuse, such as high-RPM operation when the engine is cold.
