Engine Bearings
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- Omix-ADA®Main BearingMain Bearing by Omix-ADA®. Is your CHECK ENGINE light on? Has your vehicle failed a state emissions test? Your vehicle's emissions control system is in need of repair, but before you waste your time and gas running out to the auto parts...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$45.41 - $147.02
- German®Engine Crankshaft Main Bearing SetEngine Crankshaft Main Bearing Set by German®. Keep your vehicle working in top condition with premium parts by German. Made using innovative technologies and the highest quality materials, they deliver excellent performance and...Manufactured from high-strength materials to lastDurable construction to withstand everyday wear and tear$135.22 - $517.41
- Merchant Automotive®Engine Main BearingEngine Main Bearing by Merchant Automotive®. If you’re looking for high-quality aftermarket parts for your truck, you can’t go wrong with Merchant Automotive. Top-grade Merchant Automotive products are designed by...Designed using sophisticated technology and equipmentMade to combine functionality and reliability$200.54
- PCE®Camshaft Bearing SetCamshaft Bearing Set by PCE®. These PCE camshaft bearings are made to meet or exceed OEM parts when it comes to strength and durability. They will help to give your motor extra life, and their quality construction and superior materials...Expertly Crafted from the highest grade materialsDesigned with breakthrough technology$29.40 - $50.00
- PCE®Main BearingsMain Bearings by PCE®. These Procomp Electronics main bearings are just what you need to freshen up your engine. They use silicon aluminum bi-metal construction. Silicon aluminum is the choice for many of today's engine manufacturers...Expertly Crafted from the highest grade materialsDesigned with breakthrough technology$39.70 - $101.80
- PCE®Rod BearingsRod Bearings by PCE®. This premium product is the best way to go for those looking for the highest quality replacement that offers supreme levels of quality, performance and reliability. Designed to provide a perfect fit for a hassle...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$34.00 - $119.10
- Rauch & Spiegel®#8 Nose Main Bearing#8 Nose Main Bearing by Rauch & Spiegel®. This premium product is the best way to go for those looking for the highest quality replacement that offers supreme levels of quality, performance and reliability. Designed to provide a perfect...Designed with attention to detail to win on all levelsManufactured from the highest grade materials$181.34 - $339.75
- DNJ Engine Components®Balance Shaft Bearing SetBalance Shaft Bearing Set by DNJ Engine Components®. If you crave for the finest replacement for your worn out parts, look no further than this superior bearing set that is built with the same quality and durability as your OE parts. It...Designed to provide reliable performance within your vehicle's engineMade from top-grade materials with utmost care to ensure long-lasting service$20.38 - $38.60
- Merchant Automotive®Thrust BearingThrust Bearing by Merchant Automotive®. If you’re looking for high-quality aftermarket parts for your truck, you can’t go wrong with Merchant Automotive. Top-grade Merchant Automotive products are designed by professional...Designed using sophisticated technology and equipmentMade to combine functionality and reliability$44.82
- Industrial Injection®Connecting Rod BearingConnecting Rod Bearing by Industrial Injection®. Want to get more power out of your vehicle and make it perform at its absolute best? Looking for premium-quality replacement parts to keep your engine performing reliably? You can't go...Designed by professional craftsmen using advanced technologyManufactured from superior-grade materials for utmost dependability$11.97
- Industrial Injection®H Series Connecting Rod BearingH Series Connecting Rod Bearing by Industrial Injection®. Want to get more power out of your vehicle and make it perform at its absolute best? Looking for premium-quality replacement parts to keep your engine performing reliably? You...Designed by professional craftsmen using advanced technologyManufactured from superior-grade materials for utmost dependability$276.73
- Kolbenschmidt®Crankshaft Thrust Bearing SetCrankshaft Thrust Bearing Set by Kolbenschmidt®. Manufactured with customers in mind using most modern methods and leading-edge equipment, this premium-grade product is excellent in every detail. It ensures impeccable quality and...Unique craftsmanship paired with advanced technologyDesigned to ensure a high level of reliability and security$7.62
- Mopar®Crankshaft Main Bearing CapCrankshaft Main Bearing Cap by Mopar®. Want your prized possession to look and perform the way it was designed to? Then top-of-the-line Mopar automotive parts and accessories are for you. Made using the latest manufacturing technology...Ideal solution to keep your vehicle in top shapeCrafted from premium-grade materials and the latest technology$18.74 - $83.63
- ACDelco®Genuine GM Parts™ Camshaft Bearing (89018071)Genuine GM Parts™ Camshaft Bearing (89018071) by ACDelco®. This product is made of high-quality components to meet and exceed strict quality requirements. Designed using state-of-the-art technology and with customers in mind. It will...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$35.68
- ACDelco®Genuine GM Parts™ Camshaft Bearing (12631285)Genuine GM Parts™ Camshaft Bearing (12631285) by ACDelco®. This product is made of high-quality components to meet and exceed strict quality requirements. Designed using state-of-the-art technology and with customers in mind. It will...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$8.08
- ACDelco®Genuine GM Parts™ Camshaft Bearing (89018072)Genuine GM Parts™ Camshaft Bearing (89018072) by ACDelco®. This product is made of high-quality components to meet and exceed strict quality requirements. Designed using state-of-the-art technology and with customers in mind. It will...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$49.65
- ACDelco®Genuine GM Parts™ Camshaft Bearing (12631286)Genuine GM Parts™ Camshaft Bearing (12631286) by ACDelco®. This product is made of high-quality components to meet and exceed strict quality requirements. Designed using state-of-the-art technology and with customers in mind. It will...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$8.05
- ACDelco®Genuine GM Parts™ Camshaft Bearing (19260878)Genuine GM Parts™ Camshaft Bearing (19260878) by ACDelco®. This product is made of high-quality components to meet and exceed strict quality requirements. Designed using state-of-the-art technology and with customers in mind. It will...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$35.53
- ACDelco®Genuine GM Parts™ Connecting Rod Bearing Set (12698279)Genuine GM Parts™ Connecting Rod Bearing Set by ACDelco®. This product is made of high-quality components to meet and exceed strict quality requirements. Designed using state-of-the-art technology and with customers in mind. It will...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$13.16
- ACDelco®Genuine GM Parts™ Connecting Rod Bearing Set (12672411)Genuine GM Parts™ Connecting Rod Bearing Set (12672411) by ACDelco®. This product is made of high-quality components to meet and exceed strict quality requirements. Designed using state-of-the-art technology and with customers in...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$4.12
- ACDelco®Genuine GM Parts™ Connecting Rod Bearing Set (19209594)Genuine GM Parts™ Connecting Rod Bearing Set (19209594) by ACDelco®. This product is made of high-quality components to meet and exceed strict quality requirements. Designed using state-of-the-art technology and with customers in...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$8.22
- ACDelco®Genuine GM Parts™ Connecting Rod Bearing Set (19317283)Genuine GM Parts™ Connecting Rod Bearing Set (19317283) by ACDelco®. This product is made of high-quality components to meet and exceed strict quality requirements. Designed using state-of-the-art technology and with customers in...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$71.02
- ACDelco®Genuine GM Parts™ Connecting Rod Bearing Set (19317289)Genuine GM Parts™ Connecting Rod Bearing Set (19317289) by ACDelco®. This product is made of high-quality components to meet and exceed strict quality requirements. Designed using state-of-the-art technology and with customers in...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$29.28
- ACDelco®Genuine GM Parts™ Connecting Rod Bearing Set (19317288)Genuine GM Parts™ Connecting Rod Bearing Set (19317288) by ACDelco®. This product is made of high-quality components to meet and exceed strict quality requirements. Designed using state-of-the-art technology and with customers in...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$27.62
- ACDelco®Genuine GM Parts™ Connecting Rod Bearing Set (19317290)Genuine GM Parts™ Connecting Rod Bearing Set (19317290) by ACDelco®. This product is made of high-quality components to meet and exceed strict quality requirements. Designed using state-of-the-art technology and with customers in...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$29.28
- ACDelco®Genuine GM Parts™ Connecting Rod Bearing Set (19317292)Genuine GM Parts™ Connecting Rod Bearing Set (19317292) by ACDelco®. This product is made of high-quality components to meet and exceed strict quality requirements. Designed using state-of-the-art technology and with customers in...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$29.28
- ACDelco®Genuine GM Parts™ Connecting Rod Bearing Set (19317291)Genuine GM Parts™ Connecting Rod Bearing Set (19317291) by ACDelco®. This product is made of high-quality components to meet and exceed strict quality requirements. Designed using state-of-the-art technology and with customers in...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$29.28
- ACDelco®Genuine GM Parts™ Connecting Rod Bearing Set (19368257)Genuine GM Parts™ Connecting Rod Bearing Set (19368257) by ACDelco®. This product is made of high-quality components to meet and exceed strict quality requirements. Designed using state-of-the-art technology and with customers in...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$27.95
- ACDelco®Genuine GM Parts™ Connecting Rod Bearing Set (19317285)Genuine GM Parts™ Connecting Rod Bearing Set (19317285) by ACDelco®. This product is made of high-quality components to meet and exceed strict quality requirements. Designed using state-of-the-art technology and with customers in...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$29.28
- ACDelco®Genuine GM Parts™ Connecting Rod Bearing Set (19317287)Genuine GM Parts™ Connecting Rod Bearing Set (19317287) by ACDelco®. This product is made of high-quality components to meet and exceed strict quality requirements. Designed using state-of-the-art technology and with customers in...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$29.28
There are many different kinds of bearings used on automobiles, including ball and roller bearings, needle bearings, and tapered roller bearings, but the bearings that are commonly used inside the engine are called plain bearings. These bearings are either cylindrical or are made of two inserts that form an enclosure. Components like the crankshaft and camshaft rotate on plain bearings supported by a film of oil. Oil is supplied under pressure by the engine oil pump.
Bearing construction varies according to intended use: stock, high-performance, and racing, and there are too many variations for an in-depth discussion here. In general, there are bi-metal and tri-metal bearings. Both have the lining material applied to a rigid and supportive steel backing. Bi-metal bearings have an aluminum alloy lining. The alloy may be strengthened with other metals, and the latest alloys contain silicone, which significantly increases surface hardness. Aluminum alloys with silicone are highly resistant to seizure. Tri-metal bearings have an intermediate layer of copper bearing alloy and an overlay of lead-tin-copper alloy. They have the strength, fatigue resistance and embedability (the ability to embed hard particles like dirt and debris that would otherwise become lodged between the bearing and journal, causing wear to the journal) that is the right combination for many applications.
Bores in the cylinder block are precision machined to accept the engine bearings. The camshaft and balance shaft bearings are cylindrical and pressed into the bores. The main and connecting rod bearing bores are split, with the bottom half of the bore known as the cap. Main and connecting rod bearings are called inserts that fit into bearing “saddles” formed by the top half of the bores in the block and connecting rods, and the caps. Where required, bearings have oil holes that must align with oil passages in the block, and some may have oil grooves. The thrust main bearing is flanged where it contacts the crankshaft thrust surface. Bearing halves for the crankshaft and connecting rods have a certain amount of material that extends above the bore parting line when placed in the saddle, which is known as bearing “crush”. This ensures that the bearings will be fully seated in the bores when the caps are torqued to specification.
For optimal performance and long life, engine bearings must have the right amount of oil clearance. This clearance is the difference between the shaft diameter and the diameter of the installed bearing, and is typically between 0.001” and 0.0035”. Main and connecting rod bearing clearance can be checked with the crankshaft installed using Plastigage, but a more precise measurement can be achieved by measuring the journal diameter with a micrometer and the installed bearing diameter with a bore gauge, and subtracting the micrometer dimension from the bore gauge dimension. If the clearance is excessive and the crankshaft is worn, it can be ground undersize and the appropriate undersize bearings used. However, the main or connecting rod housing bores could also be larger than specifications, requiring the block to be aligned honed or the big ends of the connecting rods reconditioned.
Although there are some performance bi-metal bearings, most performance bearings are of tri-metal construction. Many performance bearings also come with a proprietary dry film coating to reduce friction, provide startup protection, and increase strength and heat resistance. In addition to superior materials, they also have design features better suited to high power output engines. The eccentricity of performance bearings are tailored to the engine block and connecting rod bore characteristics of performance engine components to help maintain proper oil clearance, and they have higher crush for improved bearing retention. Performance bearings may be narrower than stock or chamfered to allow for the larger fillet radiuses of performance crankshafts, and they may have enlarged oil holes and/or grooves to improve lubrication.
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Engine Assemblies
Motor Mounts
Engine Blocks
Valves & Valvetrain Parts
Pistons, Rings & Connecting Rods
Oil Filters
Serpentine Belts & Auxiliary Drive Belts
Valve Covers
Timing Gears, Chains & Covers
Engine Oil Pans, Drain Plugs & Dipsticks
Cylinder Heads
Timing Belts
Engine Pulleys
Engine Sensors, Relays, Switches & Connectors
Oil Pumps
Drive Belt Tensioners
Oil Coolers
Camshafts
Crankshafts
Engine Management Systems
Harmonic Balancers
Engine Rebuild Kits
Oil Catch Cans
Balance Shafts
Engine Swap Kits
Engine Wiring Harnesses
Intercoolers
Throttle Bodies
Carburetors
Motor Oils