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Pistons Rings
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Your engine goes through a 4-stroke combustion cycle thousands of times each minute. This cycle generates an enormous amount of heat that threatens to damage the entire assembly. Temperatures can climb to the point where the engine overheats and the fuel within the combustion chambers begins to detonate. This can lead to damage to the pistons, valves, and rings.

Preventing this problem from happening is the cooling system. It is comprised of a network of components, including the radiator, hoses, water pump, and engine thermostat. Coolant flows through this network and into the engine, absorbing heat away from the assembly. It then transports that heat to the radiator, thus protecting your engine from overheating.

At the center of this system sits the thermostat. In this article, we'll take a closer look at the role it plays in the efficient operation of your vehicle. I'll also describe the consequences of this component failing, and offer a few suggestions for replacing it.

The Role Of The Thermostat

When you first start your car, the engine is cold. It requires time to reach its normal operating temperature. While the temperature surrounding the assembly climbs, coolant is kept from circulating through the cooling system. The component responsible for keeping it at bay is the thermostat.

One of the main purposes of the thermostat is to help your engine reach an optimal temperature as quickly as possible. That is when the assembly operates at its most efficient. Once a given temperature (typically 195 degrees Fahrenheit) is reached, the component opens and allows coolant to rush through the hoses toward your radiator. There, it releases heat and circles back to the engine to repeat the process.

What Happens When It Fails?

Even though this part is seldom mentioned, it has an important job to perform. If it fails to do its job, your engine can overheat. For example, the thermostat may remain in the closed position and thus, prevent coolant from flowing to the radiator. As a result, the heat contained in the fluid is not allowed to dissipate. Eventually, rising temperatures overwhelm your engine and cause it to seize. This can occur within minutes.

Suppose the component fails and remains in the open position. In this case, coolant is allowed to flow unhindered, which can cause the temperature surrounding your engine to drop. This, in turn, causes the operating efficiency of the assembly to falter. It should generate a fault code you can pull with a diagnostic scanner.

Replacing The Engine Thermostat

A failing thermostat needs to be replaced rather than repaired. Choose a replacement that has the same temperature rating as your failing unit. Most are set to open at 195 degrees Fahrenheit, but this can vary. Installing a replacement with the wrong setting can lead to excess fuel consumption, wearing around the rings, and other problems.

Most thermostats are located near the top radiator hose. Once you find this hose, detach and remove it. Have a small container ready to catch fluid as it leaks from the opening. You'll notice a few small bolts holding the component in place. Remove those bolts and lift the part from its housing.

Use a scraper to remove the residual gasket material around the exposed surface on the inside of the housing. Place a new gasket inside, install the new thermostat, and replace the top of the housing. Connect the top radiator hose, replace the clamp, and replenish the cooling system with coolant (use a 50-50 blend). This entire job should take less than an hour.

The thermostat's size and nondescript nature make it easy to ignore. But it plays a key role in the smooth operation of your engine. Even though it's a relatively inexpensive auto part (it can usually be purchased for less than $30), it can cause expensive damage if it malfunctions.

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Why I Would Buy the Echo PB251 Leaf Blower

Manufacturers of leaf blowers have had to take into consideration the new laws relating to noise and air pollution output from gas driven power tools. Out of all of these tools the gas blower has had the worst record in creating large amounts of noise pollution. Echo have responded to these requirements by producing machines that both meet these needs and still produce the power we need to get the yard jobs done. They have also managed to develop some nice features in the process.

 

With a maximum air speed of 145 mph the Echo PB 251 hand held blower is easily able to cope with clearing decent sized yards. The speed of the air gets the leaves and debris moving and then the 390 CFM air volume generated makes sure that it keeps moving. It is powered by a 25.4 cc power boost vortex engine. It definitely packs a punch. Although it isn’t as powerful as back pack models it still manages to cope with most jobs and you haven’t got all the problems of having to get strapped in.  Despite the power generated, the amount of noise produced has been kept down to 65db, which should meet the regulation needs in most areas. There is some debate about the design of the engine as far as the number of piston rings is concerned. This engine has one piston ring where as other designs have 2 rings. There have been no problems reported about this, as far as I know.

 

One of the most important features of a good power tool is its ability to start quickly and easily. The PB 251 cranks very easily and there is no need to prime the fuel every time. When the weather is hot and you need to blow your yard and sidewalks off, you want something that is going to start quickly and finish off your yard as soon as possible. This Echo machine does just that. It also has no problems starting when the engine is hot. Some people have complained about its ability to start, but this just seems to be a small minority. It is thought that the need for lean mixtures to meet emissions laws might be responsible for some problems in these kinds of machines. You need to make sure you use the correct grades of gas and oil in the fuel mixture.

 

A number of features make this gas powered leaf blower easy to use. With a weight of only 9.9lbs this is a light machine which helps a lot when it comes to using it for longer periods of time. It has two handles making it easy to hold and the top handle has three positions to help in directional operation. It uses rotation control technology to stop the force of the air coming out of the blower from trying to twist the machine out of your hands. There is also a useful trigger lock. As well as being very quiet the machine doesn’t suffer very much from vibrations. 

 

The reliability and standard of manufacture of garden power tools varies greatly but this blower is definitely on the quality side of the spectrum. It has a good amount of power and will take care of anything for the average home. It will blow light to moderate piles of lawn clippings and leaves with no effort at all. It is a great machine for a reasonable price with a fantastic 5 year warranty.

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blown pistons or rings? or both?

when my car is running, the exhaust smells like its burning rich, the car doesnt take off fast enough, and oil smells like gas. symptoms of bad piston, rings or both? thanks.
and, if i buy a compression tester thing, what compression is average?
sorry, its a 67 volvo.
not fuel injected.

Oil smells like gas, running too rich. Bad piston or rings usually spits oil out of crankcase into air filter or engine seals.
Gasoline in oil is a sign of running too rich

St. Louis: John Force Racing final report
MADISON, IL --- 2009 Full Throttle Funny Car champion Robert Hight was looking for a turn-around weekend at the AAA Insurance NHRA Midwest Nationals and he delivered. On Wednesday Hight talked about the importance of performing well at his sponsor's race to the St. Louis media members.

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