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Engine Cylinder
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Small block Chevy casting numbers are engine series numbers cast into the engine block, cylinder heads, intake and exhaust manifolds. They are used to identify the series of engine castings designed for a specific model of car. You can use Chevy small block casting numbers to ensure the accuracy of parts on your classic car restoration, or if you are car hunting, to ensure you are getting what you are paying for.

You would use an engine casting number decoder book in a few scenarios. Picture this...

• You are looking at a 66 Chevelle that someone has for sale and want to know if it has the correct engine.
• Or... you are at a swap meet and a guy has a few engine parts he's selling. There is a set of camel hump heads he says are off a 327 that "came out of a Corvette."
• You are spending the day at a "U-Pick" junk yard. You are looking for an engine core for your classic car restoration project and you run across a 65 Impala SS with an engine in it.

To know for sure you would need to lookup the casting numbers.

The Chevy small block engine casting number can be found on the bell housing section of the block just behind the passenger side cylinder head. This number will indicate some notable design specs such as, 2 or 4 bolt main bearing caps, what models of cars it was installed in, the years it was installed in those cars, and in some cases the horse power rating. Some casting numbers were used for several different models so when in doubt you will need to lookup the suffix code stamped into the engine.

The Chevy small block casting date would help you narrow down which decade the block was cast if use of the casting number spanned decades, such as the late 60's through the early 70's.

The suffix codes were numbers stamped into the engine block at assembly time. They can tell you which car the engine was originally installed in, the year, and even the option series for the car.

In general when shopping for casting number decoders you will find casting numbers and suffix codes in separate books. Casting number information for intake and exhaust manifolds, or cylinder heads is generally included in the engine block casting number decoder books. Be sure to look for the years of coverage when selecting a decoder. Some casting number decoders only cover the classic years from the 50's through the 80's and may not provide information on late model engines.

Some of the most useful decoders come in smaller sizes that will fit in a coat pocket or tool box, which comes in handy for junk yard scavenger hunts or swap meets. Others come in larger standard book sizes and will generally include more pictures and diagrams than the smaller text only sizes.

In either case, small or large, you will find them indispensable and well worth the price. Most casting number guides range in price from $15-30 US.

Carl M King lives in Baltimore, Md. He has 30 years of classic car restoration experience, and is owner of The Impala Project. The Impala Project is the documented restoration a his 1964 Impala including how-to articles on common classic car repair tasks, activity blog and forums. You can visit The Impala Project at http://www.classiccarauto.com

Copyright 2007 Carl M King. Reprint rights granted provided the author bio and website URL is maintained with the article.

Get Effective Engine Cooling With a Pontiac Water Pump

A pump is a device designed to move liquids or slurries from lower pressure to a higher pressure. It works by using mechanical forces to push the material, either by physically lifting, or by the force of compression. Pumps generally fall in two major categories: the rotodynamic pumps and positive displacement pumps. The categories are based on the method for moving fluid. Rotodynamics pumps are based on bladed impellors which rotate within the fluid and serves to convert the increase in the energy of the fluid into pressure energy for an associated piping system. A positive displacement pump causes a liquid to move by trapping an amount and displacing it into a discharge pipe.

The Pontiac Water Pump is a simple centrifugal pump and an important component of the cooling system. It is a small-impeller pump responsible for circulating the coolant through the engine’s cooling system whenever the engine is running. It is mounted on the engine and is driven by the fan belt, alternator belt or sometimes the timing belt connected to the crankshaft of the engine. Centrifugal pumps are rotodynamic pumps which convert mechanical energy into hydraulic energy by centripetal force meaning acting perpendicular to the direction of the motion of the body) on the liquid. Most water pumps are centrifugal pumps consisting of inlets, outlets, housing, a shaft, a rotating impeller, a volute and sometimes a shroud. The Pontiac Water Pump uses centrifugal pump to send fluid to the outside while it spins which causes the fluid to be drawn from the center continuously. Located near the center is the inlet to the pump which allows the fluid returning from the radiator to hit the pump vanes. These pump vanes then throw the fluid to the outside of the pump where it can enter the engine. A pulley is mounted on the shaft on the outer side while on the inner side the impeller that acts like a centrifugal pump as well as the seal to keep the coolant from leaking out are located. The coolant is moved by the Pontiac Water Pump through the water jackets into the engine cylinder block then to the cylinder head and into the radiator and finally back to the pump. This is the process that removes the heat from the engine by removing the heat from the coolant before it goes back to the engine.

There are different designs of water pumps depending on their purpose. The rotating impeller which is responsible for transmitting the coolant is the commonly installed water pump. Rear wheel drive cars often have the fan installed on the end of the water pump shaft. To prevent leakage around the pump shaft, these water pumps usually have spring-loaded seal. There are also water pumps that have pre-packed ball bearings at each end so lubrication will not be necessary. Pumps also wear internally depending on the liquid being pumped, materials used for construction and the operating regimen. Common problems of a Pontiac Water Pump are coolant leaks, noisy or defective bearing and damaged or corroded impeller. Faulty Pontiac Water Pump can cause the engine to overheat causing graver damage to the engine itself.

About the Author

Anthony Fontanelle is a 35-year-old automotive buff who grew up in the Windy City. He does freelance work for an automotive magazine when he is not busy customizing cars in his shop.

Peculiar Fiat 500, 4 headlights, wide steel wheel arches, 4 cylinder engine and servo assisted brakes?

I have seen this car for sale in a scrap yard, it looks all original but I have never seen one with 4 headlights before. The wheel arches are wide (but definately manufactured that way) and it has wide steel wheels which look original. The engine is four cylinder (600cc) and in the engine bay there is a remote servo for the brakes.

Can anyone help me identify this model as I've never seen anything like it.

Thanks
and no thanks oldhombre, it's not a new one, definately 70s
Hoody, can you tell me how you got to the picture, I've tried searching the site but can't find anything, better still email the url of the pic itself. Thanks

Possibly an Autobianchi, who were eventually absorbed by Fiat and marketed by Lancia. Otherwise an Abarth model of the 500?

Volvo Warns Customers of Engine Problem
The problem could cause cars to suddenly accelerate.

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