Question about 2002 Nissan Sentra

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Is it 4 stroke - 2002 Nissan Sentra

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If you are asking about the Sentra, yes it is a 4 stroke engine

Posted on Apr 03, 2011

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Hi,
Yes it is.
Wayne

Posted on Apr 03, 2011

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Hi should my 2014 450 sxf blow a black ish kind of smoke when revved an on down rev a bluey black smoke think its called blow by? And what should I do to fix it? Could it just be a spark plug? Thanks


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I have a 1994 ford escort and it's not getting eoungh power I've change the battery, sparks plugs and the alternator don't know what else to do please help


Did you check the timing? If the timing is off there will be a reduction in performance and power will be greatly reduced. If the engine is "pinging" or "knocking" under heavy acceleration, your timing is advanced, and pre ignition is occurring (that's when the spark has ignited the fuel in the combustion chamber prematurely), resulting in a knocking sound. When the piston is compressing the air/fuel mixture within the combustion chamber, the spark plug produces a spark from current it receives from contacts closing in the distributor cap. (Where all the spark plug wires are plugged into) if that spark come BEFORE the piston finishes it up stroke or compression stroke, the piston is then being slowed down from the kinetic energy produced by the exploding fuel. Thats where we loose our power. Idealy, the spark should come AFTER the piston has rotated over the top of its stroke, It has reached its limit in compression and is on its way back down then the spark should ignite the compressed fuel, thus giving the piston an additional "shove" back down to start its "Power" stroke, once its reached the bottom of the power stroke (stroke #2 of 4) it is then carried back up for the "exhaust" stroke pushing the burnt fuel out of the combustion camber and into the exhaust manifold, one it has reached the top of that stroke it begins its journey back down to start stroke number 4, the Intake stroke. Drawing in air/fuel mixture to again be pushed back upward to compress the air/fuel, and repeat the process over and over again. Now that I have thoroughly bored you to tears, Yeah, check the engine timing, if its not the timing it may be a vacuum leak.

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Dodge dakota 3.9 v6 year 2000 where should rotor point to on cap when cam gear dot at6 and crank gear dot at 12 and on tdc compression stroke it points to number 4 on cap when cam dot at 6 o clock


Make sure you are on the compression stroke. At TDC of compression stroke, the rotor should be pointing to number 1 on the cap. Either you are on the exhaust stroke, or the distributor is 180 degrees off and needs to be reset.

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Standard bore size mm


ENGINE 2 stroke single cylinder direct reed valve crankcase induction Liquid cooled 125 cc engine Cylinder size 124 8 cc Bore and stroke 54 x 54 5 mm 200 cc engine Cylinder size 175 3 cc Bore and stroke 64 x 54 5 mm 250 cc engine Cylinder size 247 7 cc Bore and stroke 72 5 x 60 mm 280 cc engine Cylinder size 272 2 cc Bore and stroke 76 x 60 mm 300 cc engine Cylinder size 294 1 cc Bore and stroke 79 x 60 mm I Cant put periods or commas so bare with me

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After top dead center what valve starts opening number 1 intake or number 1 exhaust?


It depends on which TDC you are talking about, compression TDC or exhaust TDC. On the compression stroke, no valves will open after TDC-this is when combustion has occured, the power stroke. When the piston reaches bottom and starts up on the exhaust stroke, then exhaust valve will open. At TDC of exhaust stroke, exhaust valve will be closed, and the intake valve will then open as piston is moving down.
If you have the intake valve opening right after TDC, you are on the exhaust stroke of that cylinder. The exhaust valve is only open during upward movement of the piston on the exhaust stroke. Immediately after TDC of exhaust stroke, the intake will open as the piston travels downward.

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Step by step instructions on timing belt installation 2000 hyundai accent


Right, so you have two TDC's-the exhaust stroke and the compression stroke Top Dead Center-and both occurr when the crank hits the zero mark on the timing scale.
Always set timing with the number one cylinder at TDC on the compression stroke. How do you know which is which? If you have a distributor, the rotor will be pointing to number one cylinder tower, when at TDC of the compression stroke. If you are on the exhaust stroke's TDC, the rotor will be pointing just opposite of number one .
If you don't have a distributor, look at the valves for cylinder one under the valve cover. If at TDC of compression stroke, both valves will be closed. At TDC of exhaust stroke, the exhaust valve will be open.
You can also find the compression stroke on number one by pulling out the spark plug for number one, and either put a wrench or socket on the crank pulley and turn it clockwise, or use the starter and bump the engine over in short bumps. Put your finger or thumb over the spark plug hole and feel for the pressure to build up. As soon as you feel pressure on your finger, (if turning by hand, pressure will be slight, but you can feel it) you are on the compression stroke. Stop bumping the starter and turn the crank on around by hand until the zero mark lines up on the timing scale-TDC of compression stroke! The exhaust stroke will have no pressure build-up as the piston comes to top-because the exhaust valve is open. On the compression stroke, both valves are closed as the piston travels up the cylinder.

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1 Answer

1998 dodge dakota 3.9 v6


Pull the number one sparkplug, and hold your finger or thumb over the hole while the crank is being turned. As the crankshaft comes around to the zero mark, you will feel a slight pressure buildup on the compression stroke. If you are on the exhaust stroke and approaching TDC, there will be no pressure buildup. But even turning the crank by hand, you will feel a slight pressire on your finger on the compression stroke. When at tdc of compression stroke, rotor will be pointing to number one plugwire tower-if you have a distributor, that is. But feel for the compression on number one as the crank approaches the zero mark (tdc).

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1 Answer

With a firing order 1342 if the number 1 cylinder was on firing stroke what stroke will cylinders 342 be on?


assume #1 was on fire stroke...<
#2 is on exhaust stroke...>
#3 is on compression stroke...<
#4 is on power stroke...>
<=up
>=down
gotta be worth 4 thumbs......

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A two stroke has up and down only . Compression and power Now, I thik you really meant the firing order. I'm not sure but Would make sense 2-3-2?

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