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Engine Bottom End

Engine bottom end is the part of the engine below the head gasket.

Cylinder block deck

Is a flat machined surface for the cylinder head. Bolt holes are drilled and tapped in the deck for heat bolts. Coolant and oil passages allow fluids through the block, head gasket, and cylinder heads.

Cylinders (cylinder walls)

Are large holes machined in the cylinder block for the pistons. An integral cylinder is part of the block.

Cylinder block sleeves (liners)

Is a separate part pressed into the block. There are two basic types of cylinder sleeves: dry sleeves and wet sleeves.

Cylinder bores

There are several bores in the block, lifter bores, cam bores, main bore.

Main caps

They are blot to the bottom of the cylinder block and form one-half of the main bore. Large main cap bolts screw into holes in the block to secure the caps to the block

Main bearings

Snap-fit into the cylinder block and main caps to provide an operating surface for the crankshaft main journals.

Crankshaft

It converts the reciprocating of the pistons into a rotating motion. The crankshaft fits into the main bore of the block The crankshaft has a crankshaft oil passages, counterweights, crankshaft flange with the pilot bearing in the center to support the manual transmission input shaft, and the crankshaft oil seals.

Crank main journals

Are precision machined and polished surfaces that ride on the main bearings.

Crank rod journals

Also terms crankpins are also machined and polished surfaces, but they are for the connecting rod bearings.

Flywheel

Is a large steel disc mounted on the rear flange of the crankshaft. The flywheel has a large ring gear that allows engine starting.

Connecting rod

Fastens the piston to the crankshaft.

Rod cap

Bolts to the bottom of the connecting rod body. It can be removed to for disassembly of the engine.

Rod bearings

Ride on the crankshaft rod journal.

Piston pin

Allows the piston to swing on the connecting rod. The pin fits through the hole in the piston and the connecting rod small end.

Pistons

Transfers the pressure f the combustion to the connecting rod and crankshaft. It must hold the piston rings and piston pin while operating in the cylinder.

Piston rings

Automotive pistons normally use three rings- two compression rings and one oil ring.

Balancer shafts

Are used in some engines to reduce vibration. These counterweighted shafts are generally mounted in the left and right side of the engine block and are driven by a belt or chain.

Oil Pan Gasket Leak - How To Diagnose And Confirm The Leak
Automotive Leaks

Oil Pan Gasket Leak – How To Diagnose And Confirm The Leak

January 20, 2021

The oil pan gasket has only one important job to do and that is; sealing the oil pan to the bottom of the engine. But, it is not uncommon for the gasket to wear out […]

Oil Consumption Past Rings - Worn Engine Bearings Can Make It Worse
Engine Bottom End

Oil Consumption Past Rings – Worn Engine Bearings Can Make It Worse

January 18, 2021

Oil consumption is something nobody wants. So, how can worn engine bearings make it worse ? Engine oil consumption past rings, will only get worse when, engine bearings begin to wear out. So, oil consumption […]

Engine Bearing Replacement - Learn How To Replace Engine Bearings
Engine Bottom End

Engine Bearing Replacement – Learn How To Replace Engine Bearings

December 23, 2020

Engine bearing replacement is not as hard as it sounds. So, if you have a bearing failure, learning how to replace engine bearings, can save you a ton of money. Consequently, doing your own engine […]

Engine Bearing - Function, Failure Symptoms, Causes And Prevention
Engine Bottom End

Engine Bearing – Function, Failure Symptoms, Causes And Prevention

December 7, 2020

An engine bearing is a small and relatively; inexpensive component of an internal combustion engines. However, failure of an engine bearing commonly leads to; serious reconditioning work of the engine. Most often, including its disassembly; […]

Valves And Piston Rings - Functions - Failure Warning Signs - Testing
Engine Bottom End

Valves And Piston Rings – Functions – Failure Warning Signs – Testing

December 1, 2020

Valves and piston rings are crucial for your engine to function properly. Aside from your head gasket, these are the parts that are responsible for sealing the combustion chamber. Most of the time, valves and […]

Crankshaft Damage - Diesel Engines Are Way More Prone To Damage
Engine Bottom End

Crankshaft Damage – Diesel Engines Are Way More Prone To Damage

November 17, 2020

So, A broken or cracked crankshaft is considered major engine damage. The good thing is that crankshaft damage is not a very common occurrence. Crankshaft damage can happen due to a casting or forging flaw […]

How Do Engine Piston Rings Actually Work - What Causes Them To Fail
Engine Bottom End

How Do Engine Piston Rings Actually Work – What Causes Them To Fail

June 10, 2020

In everyday vehicles the engine piston rings have, the most important job of sealing the combustion chamber. So, one of the most prominent materials, used in making engine piston rings is cast iron. This is […]

Cylinder Sleeve - How To Install A Cylinder Sleeve To Salvage A Block
Engine Bottom End

Cylinder Sleeve – How To Install A Cylinder Sleeve To Salvage A Block

May 25, 2020

Learning how to install a cylinder sleeve is an excellent way to salvage an otherwise junk block. The primary reasons for installing a cylinder sleeve in a block is to either repair a damaged cylinder […]

Engine Bottom End Components - Know The Parts Inside Your Engine
Engine Bottom End

Engine Bottom End Components – Know The Parts Inside Your Engine

March 20, 2020

The engine assembly is, by far the most important part of all the engine bottom end components. But, The engine is not just one thing. Consequently, It is made up of a whole list of […]

Rear Main Rope Seal - There Are Alternatives For Many Older Engines
Automotive Leaks

Rear Main Rope Seal – There Are Alternatives For Many Older Engines

March 9, 2020

So, Using a rear main rope seal is almost a thing of the past, and has greatly diminished in use. The rear main rope seal worked well in its time, as long as you completely understood […]

Rear Engine Oil Leaks - Finding The Real Location Of The Leak
Automotive Leaks

Rear Engine Oil Leaks – Finding The Real Location Of The Leak

February 11, 2020

Rear engine oil leaks that are confused with a rear main seal leak are usually an oil pan gasket leaking. Consequently, An oil pan gasket is also much less expensive to replace than a leaking […]

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Valve Stem Seal - Controls Valve Lubrication As Well As Oil Consumption
Engine Top End

Valve Stem Seal – Controls Valve Lubrication As Well As Oil Consumption

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