Main Bearing
Main bearings are the shell bearings that support the crankshaft in the engine block. Like rod bearings they rely on an oil film, and they wear or seize when oil pressure is lost. They are sold as engine sets sized to the crankshaft journals.
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Signs your Main Bearing needs replacing
- Low rumbling knock from the bottom of the engine
- Low oil pressure warning
- Metal in the oil
- Crankshaft end-float excessive (thrust bearing wear)
When to replace
Replaced during an engine rebuild, always with the crankshaft measured and the correct size chosen.
Brands we commonly supply
Availability varies by vehicle. Typical brands for this part include:
Why buy from BOTANVÈ AUTO
We are a licensed UAE trader (Botanvè FZC LLC, Ajman) supplying genuine and OEM-quality parts to garages and car owners across all seven Emirates. Every enquiry is checked against your chassis number before we quote, so the part that arrives is the part that fits. Delivery is arranged to Dubai, Sharjah, Ajman, Abu Dhabi, Ras Al Khaimah, Umm Al Quwain and Fujairah.
Main Bearing — frequently asked questions
Are thrust washers included?
On some engines they are part of the main bearing set; on others they are separate. We confirm per engine.
Can I mix bearing sizes?
Only as specified by the machine shop for each journal.
Need a Main Bearing for your car?
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Vehicle brands shown for identification. Part availability and compatibility are confirmed by enquiry; brand logos do not imply an authorised dealership or affiliation.