The Engine Explained

Written by Kevin Schappell

The engine isrepparttar heart of your car, but instead of pumping blood,repparttar 102754 engine pumps air and fuel. The engines main function is to convert air and fuel into rotary motion so it can driverepparttar 102755 wheels ofrepparttar 102756 car. How does it do that ??.... Well let's start with a cutaway ofrepparttar 102757 engine and see allrepparttar 102758 major parts then we will get intorepparttar 102759 actual mechanics. Pistons: Most common engines have 4, 6, or 8 pistons, which move up and down inrepparttar 102760 cylinders. Onrepparttar 102761 upper side ofrepparttar 102762 piston is what is calledrepparttar 102763 combustion chamber whererepparttar 102764 fuel and air mix before ignited. Onrepparttar 102765 other side isrepparttar 102766 crankcase, which is full of oil. Pistons have rings which serve to keeprepparttar 102767 oil out ofrepparttar 102768 combustion chamber andrepparttar 102769 fuel and air out ofrepparttar 102770 oil. Crankshaft: The crankshaft is connected torepparttar 102771 pistons via a connecting rod. Asrepparttar 102772 piston moves up and down inrepparttar 102773 cylinder it rotatesrepparttar 102774 crankshaft and convertsrepparttar 102775 straight line motion into rotary motion. Valve train: The valve train consists of valves, rocker arms, pushrods, lifters, andrepparttar 102776 camshaft. (shown in above picture in blue, yellow, and green) The valve train’s only job is that of a traffic cop. It lets air and fuel in and out ofrepparttar 102777 engine atrepparttar 102778 proper time. The timing is controlled byrepparttar 102779 camshaft, which is synchronized torepparttar 102780 crankshaft by a chain or belt. Now that we have a general overview ofrepparttar 102781 parts involved let's talk about what happens. Most automotive engine today are 4-stroke (or 4-cycle) engines, meaning they have four distinct events which make uprepparttar 102782 cycle. ·Intake stroke: The camshaft opensrepparttar 102783 intake valve andrepparttar 102784 piston moves downrepparttar 102785 cylinder. This creates vacuum and sucks in air and fuel intorepparttar 102786 combustion chamber aboverepparttar 102787 piston. ·Compression stroke: Asrepparttar 102788 piston starts moving back uprepparttar 102789 cylinderrepparttar 102790 intake valve closes and seals offrepparttar 102791 combustion chamber. The causesrepparttar 102792 air and fuel to compress. ·Power stroke: Asrepparttar 102793 fuel is compressed andrepparttar 102794 piston nearsrepparttar 102795 top ofrepparttar 102796 cylinderrepparttar 102797 spark plug fires and ignitesrepparttar 102798 fuel and air. This explosion pushesrepparttar 102799 piston back downrepparttar 102800 cylinder and drivesrepparttar 102801 crankshaft. ·Exhaust stroke: Afterrepparttar 102802 piston reachesrepparttar 102803 bottom ofrepparttar 102804 cylinder,repparttar 102805 exhaust valve opens andrepparttar 102806 gasses left over fromrepparttar 102807 fuel and air are sent out torepparttar 102808 exhaust system. Put these four events together inrepparttar 102809 above order and you have a complete cycle. Are you asleep yet? That's enough theory, let's talk aboutrepparttar 102810 real world and problems you might encounter withrepparttar 102811 above mentioned parts. Pistons: Remember I talked aboutrepparttar 102812 rings, which sealrepparttar 102813 combustion chamber fromrepparttar 102814 crankcase. The rings over time tend to wear out. When they wear they allowrepparttar 102815 fuel and air to enter intorepparttar 102816 oil and dilute it. This dilution reducesrepparttar 102817 oils ability to lubricate your engine and can cause premature wear. Also ifrepparttar 102818 rings wear down they can allow oil fromrepparttar 102819 crankcase to enterrepparttar 102820 combustion chambers. This will result in oil being burned and exiting your tailpipe as grayish/white smoke. If your car spews grayish white smoke and it does not go stop inrepparttar 102821 first few minutes after start-up you might have warn rings. Ifrepparttar 102822 smoke goes away after start-up look torepparttar 102823 valve train section. Crankshaft: The crankshaft rides on bearings, which can wear down over time. The bearings supportrepparttar 102824 crankshaft and alsorepparttar 102825 rods, which connectrepparttar 102826 pistons torepparttar 102827 crankshaft. A loud medium pitched knocking noise inrepparttar 102828 engine points to warn bearings most ofrepparttar 102829 time. This is usually a costly repair and involves removingrepparttar 102830 crankshaft and either machiningrepparttar 102831 surface whererepparttar 102832 bearings ride, or replacingrepparttar 102833 entire crankshaft. To prevent this type of problem, use a high quality oil, change your oil at suggested intervals (3 months or 3000 miles is a safe number) and always maintain your oil level between oil changes.

How to Change A Tire

Written by Kevin Schappell

It always happens atrepparttar worst times! You need to know how to change a tire even if you have an auto club membership. Depending on where you get a flat, there may not be a phone nearby to call a tow truck. Let's take is step by step and always remember to read your owners manual, there will be detailed instructions relating to your car there. I should mention also a few tips for getting torepparttar 102753 side ofrepparttar 102754 road safely if you have a blowout onrepparttar 102755 road. ·Stay calm, do not panic ·Slowly take your foot off ofrepparttar 102756 gas and letrepparttar 102757 vehicle coast to a stop. ·Do not make any sudden braking or steering actions. ·Put your flashers on to alert other drivers. ·Now that you are safely off ofrepparttar 102758 road. Step 1: Make sure you are on firm level ground and away from traffic. If you are not, then try to drive to a better spot, but only if you can do it safely. Avoid going back ontorepparttar 102759 road and into traffic. Step 2: Set your emergency brake and putrepparttar 102760 car in Park or 1st gear if you have a manual transmission. Make surerepparttar 102761 engine is turned off. Step 3: Locaterepparttar 102762 spare tire, jack, and lug wrench. These are usually located inrepparttar 102763 trunk underneathrepparttar 102764 carpet on cars. Trucks usually haverepparttar 102765 jack and lug wrench behindrepparttar 102766 seat or underrepparttar 102767 hood, withrepparttar 102768 spare tire underrepparttar 102769 bed. Step 4: Typically there are instructions printed onrepparttar 102770 jack or somewhere nearrepparttar 102771 storage compartment. Read these instructions, they will tell you where to jackrepparttar 102772 vehicle and any special steps you will need to take. Step 5: First removerepparttar 102773 hubcap or wheel cover. The lug wrench often has a flat end, which you can use to pry offrepparttar 102774 cover. If not, a screwdriver will work just fine. Step 6: Before you jackrepparttar 102775 car up you will want to break looserepparttar 102776 lug nuts. The weight ofrepparttar 102777 car will keeprepparttar 102778 wheel from spinning and allow you to apply more force torepparttar 102779 nuts. You do not want to completely removerepparttar 102780 lug nuts yet.... just break them loose. Oncerepparttar 102781 lug nut begins to move, STOP and move ontorepparttar 102782 next one. I often carry a small pipe, which will fit overrepparttar 102783 lug wrench. This pipe can provide additional leverage and allow you to get those stubborn lug nuts off. Always remember righty tighty, lefty loosy. Turnrepparttar 102784 lug nuts left or counter clockwise to loosen.

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