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A 4-bolt main refers to the number of bolts attaching the main bearing caps to the block of an internal combustion engine. [1]

14 relations: Aluminium, Chevrolet, Chevrolet Camaro, Chrysler, Cross-bolted bearing, Cylinder block, Ford Motor Company, Internal combustion engine, Main bearing, Maybach Zeppelin, Nissan VQ engine, Toyota MZ engine, Toyota UZ engine, 6-bolt main.


Aluminium (or aluminum; see) is a chemical element in the boron group with symbol Al and atomic number 13.

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Chevrolet, colloquially referred to as Chevy and formally the Chevrolet Division of General Motors Company, is an American automobile division of the American manufacturer General Motors (GM).

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Chevrolet Camaro

The Chevrolet Camaro is an automobile manufactured by Chevrolet, classified as a pony car and some versions also as a muscle car.

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Chrysler, officially FCA US LLC, is an American automobile manufacturer headquartered in Auburn Hills, Michigan and owned by holding company Fiat Chrysler Automobiles, headquartered in London, U.K. Chrysler is one of the "Big Three" American automobile manufacturers.

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Cross-bolted bearing

A cross-bolted bearing is a bearing, usually a crankshaft main bearing of a piston engine.

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Cylinder block

A cylinder block is an integrated structure comprising the cylinder(s) of a reciprocating engine and often some or all of their associated surrounding structures (coolant passages, intake and exhaust passages and ports, and crankcase).

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Ford Motor Company

The Ford Motor Company (commonly referred to as simply Ford) is an American multinational automaker headquartered in Dearborn, Michigan, a suburb of Detroit.

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Internal combustion engine

An internal combustion engine (ICE) is a heat engine where the combustion of a fuel occurs with an oxidizer (usually air) in a combustion chamber that is an integral part of the working fluid flow circuit.

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Main bearing

In a piston engine, the main bearings are the bearings on which the crankshaft rotates, usually plain or journal bearings.

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Maybach Zeppelin

The Maybach Zeppelin was the Maybach company's Repräsentationswagen model from 1929 to 1939.

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Nissan VQ engine

The VQ is a V6 piston engine produced by Nissan with displacements varying from 2.0 L to 4.0 L.

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Toyota MZ engine

The Toyota MZ engine family is a V6 piston engine series.

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Toyota UZ engine

The Toyota UZ engine family is a 32-valve quad-camshaft V8 piston engine series used in Toyota's luxury offerings and sport utility vehicles.

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6-bolt main

6-bolt main refers to the number of bolts holding the main caps to the block of an internal combustion engine, and therefore holding the crankshaft in place.

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Redirects here:

4 Bolt Main, 4-Bolt Mains.


[1] https://en.wikipedia.org/wiki/4-bolt_main

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