Engine Bearings
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- PCE®Camshaft Bearing Set (PCE236.1006)Camshaft 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
- PCE®Camshaft Bearing Set (PCE236.1003)Camshaft Bearing Set by PCE®. These Procomp Electronics 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...Expertly Crafted from the highest grade materialsDesigned with breakthrough technology$50.00
- PCE®Main Bearings (PCE235.1001)Main Bearings (PCE235.1001) by PCE®. 5 Pieces. Crankshaft Undersize: 0.010". These Procomp Electronics main bearings are just what you need to freshen up your engine. Why? They use silicon aluminum bi-metal construction. Silicon...Expertly Crafted from the highest grade materialsDesigned with breakthrough technology$58.40
- PCE®Main Bearings (PCE235.1005)Main Bearings (PCE235.1005) by PCE®. 5 Pieces. Crankshaft Undersize: Stock. These Procomp Electronics main bearings are just what you need to freshen up your engine. Why? They use silicon aluminum bi-metal construction. Silicon aluminum...Expertly Crafted from the highest grade materialsDesigned with breakthrough technology$39.70
- PCE®Main Bearings (PCE235.1015)Main Bearings (PCE235.1015) by PCE®. 5 Pieces. Crankshaft Undersize: Stock. These Procomp Electronics main bearings are just what you need to freshen up your engine. Why? They use silicon aluminum bi-metal construction. Silicon aluminum...Expertly Crafted from the highest grade materialsDesigned with breakthrough technology$101.80
- PCE®Rod Bearings (PCE234.1016)Rod Bearings (PCE234.1016) by PCE®. 8 Pieces. Crankshaft Undersize: Stock. These Procomp Electronics connecting rod bearings are just what you need to freshen up your engine. Why? They use silicon aluminum bi-metal construction. Silicon...Expertly Crafted from the highest grade materialsDesigned with breakthrough technology$34.00
- PCE®Rod Bearings (PCE234.1001)Rod Bearings (PCE234.1001) by PCE®. 8 Pieces. Crankshaft Undersize: 0.010". These Procomp Electronics connecting rod bearings are just what you need to freshen up your engine. Why? They use silicon aluminum bi-metal construction....Expertly Crafted from the highest grade materialsDesigned with breakthrough technology$63.20
- PCE®Rod Bearings (PCE234.1005)Rod Bearings (PCE234.1005) by PCE®. 8 Pieces. Crankshaft Undersize: Stock. Large Journal. These Procomp Electronics connecting rod bearings are just what you need to freshen up your engine. Why? They use silicon aluminum bi-metal...Expertly Crafted from the highest grade materialsDesigned with breakthrough technology$34.00
- PCE®Rod Bearings (PCE234.1006)Rod Bearings (PCE234.1006) by PCE®. 8 Pieces. Crankshaft Undersize: Stock. Large Journal & Large Radius Crank. Narrow. These Procomp Electronics connecting rod bearings are just what you need to freshen up your engine. Why? They use...Expertly Crafted from the highest grade materialsDesigned with breakthrough technology$119.10
- PCE®Rod Bearings (PCE234.1021)Rod Bearings (PCE234.1021) by PCE®. 8 Pieces. Crankshaft Undersize: Stock. These Procomp Electronics connecting rod bearings are just what you need to freshen up your engine. Why? They use silicon aluminum bi-metal construction. Silicon...Expertly Crafted from the highest grade materialsDesigned with breakthrough technology$106.90
- Porsche OEUpper Power Steering Pump Mounting Bolt (90038504201)Upper Power Steering Pump Mounting Bolt (90038504201) by Porsche OE. If you want to prolong the life of your Porsche and keep it performing the way it was designed to, you need spare parts that are made with the same precision as your...Genuine Porsche OEM part designed specifically for your vehicleIdeal solution to bring your vehicle back to its original condition$3.10
- Rauch & Spiegel®#8 Nose Main Bearing (211.153)#8 Nose Main Bearing (211.153) 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...Designed with attention to detail to win on all levelsManufactured from the highest grade materials$245.41
- Rauch & Spiegel®#8 Nose Main Bearing (211.103)#8 Nose Main Bearing (211.103) 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...Designed with attention to detail to win on all levelsManufactured from the highest grade materials$181.34
- Rauch & Spiegel®#8 Nose Main Bearing (411.101)#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$339.75
- Suzuki OEA/C Compressor Bolt (015500855A)A/C Compressor Bolt (015500855A) by Suzuki OE. To maintain your Suzuki’s reliable performance and original appearance, look no further than Suzuki OE parts. They are made to the exact specifications of the parts that originally came...Genuine Suzuki OEM part designed specifically for your vehicle to fit perfectlyProven to look and function exactly like the parts installed in your vehicle when it was new$3.17
- Volkswagen OEAccessory Drive Belt Idler Pulley Bolt (WHT005688)Accessory Drive Belt Idler Pulley Bolt (WHT005688) by Volkswagen OE. Famous for its reliability, comfort, and style, your Volkswagen needs nothing but premium-quality genuine parts to keep running and looking great for years to come....Genuine Volkswagen OE part that offers superior fit and qualityDesigned to help get your vehicle back in top condition$3.05
- ACDelco®Genuine GM Parts™ Rear Balance Shaft Bearing (12596598)Genuine GM Parts™ Rear Balance Shaft Bearing (12596598) 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$16.96
- Clevite®Crankshaft Thrust Washer Set (TW706S)Crankshaft Thrust Washer Set by Clevite®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will meet your needs and deliver great...Expertly crafted from premium materialsDesigned to match rigorous quality standards$10.25
- Clevite®Crankshaft Thrust Washer Set (TW707S)Crankshaft Thrust Washer Set by Clevite®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will meet your needs and deliver great...Expertly crafted from premium materialsDesigned to match rigorous quality standards$10.49
- Clevite®Crankshaft Thrust Washer Set (TW714S)Crankshaft Thrust Washer Set by Clevite®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will meet your needs and deliver great...Expertly crafted from premium materialsDesigned to match rigorous quality standards$17.93
- Clevite®Crankshaft Thrust Washer Set (TW694S)Crankshaft Thrust Washer Set (TW694S) by Clevite®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will meet your needs and deliver...Expertly crafted from premium materialsDesigned to match rigorous quality standards$28.91
- Clevite®Crankshaft Thrust Washer Set (TW-719S)Crankshaft Thrust Washer Set by Clevite®. 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...High quality at an affordable priceExpertly made from premium materials$25.62
- Clevite®Crankshaft Thrust Washer Set (TW-692S)Crankshaft Thrust Washer Set (TW-692S) by Clevite®. 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...High quality at an affordable priceExpertly made from premium materials$27.07
- Clevite®Crankshaft Thrust Washer Set (TW-697S)Crankshaft Thrust Washer Set by Clevite®. 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...High quality at an affordable priceExpertly made from premium materials$13.10
- Clevite®Crankshaft Thrust Washer Set (TW-722S)Crankshaft Thrust Washer Set by Clevite®. 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...High quality at an affordable priceExpertly made from premium materials$21.55
- Clevite®Crankshaft Thrust Washer Set (TW-716S)Crankshaft Thrust Washer Set by Clevite®. 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...High quality at an affordable priceExpertly made from premium materials$15.94
- Clevite®Crankshaft Thrust Washer Set (TW-720S)Crankshaft Thrust Washer Set by Clevite®. 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...High quality at an affordable priceExpertly made from premium materials$12.65
- Clevite®Crankshaft Thrust Washer Set (TW-695S)Crankshaft Thrust Washer Set by Clevite®. 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...High quality at an affordable priceExpertly made from premium materials$37.77
- Clevite®Crankshaft Thrust Washer Set (TW677S)Crankshaft Thrust Washer Set by Clevite®. 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...High quality at an affordable priceExpertly made from premium materials$13.01
- Clevite®Crankshaft Thrust Washer Set (TW678S)Crankshaft Thrust Washer Set (TW678S) by Clevite®. 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...High quality at an affordable priceExpertly made from premium materials$12.99
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
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Pistons, Rings & Connecting Rods
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