Question about 1995 Toyota Avalon

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D top dead center

Using gauge in number one cylinder to find top dead cender

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Use a piece of metal,cut of a coat hanger,anything that
you can watch come up & won't break off

Posted on Dec 05, 2012

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How to get number 1 cylinder top dead center when motor is not running on a gmc 4.3 1991


With truck off, you can turn the crankshaft nut from bottom of engine. To bring to top dead center. Remove #1 plug and insert a straw or similar into plug hole on top of piston. When the piston just starts to go back down from all the way up, that's top dead center, The number one cylinder in the 4.3 V-6 is the front wire on the driver-side of the engine. God-Bless!

Mar 03, 2015 | 1991 GMC C1500

1 Answer

I have a 2003 mazda 6 with 2.3 i think it might be out of time but i cant find the timing marks on the pulleys


Sir. The only other way to know your on no one cylinder top dead center is to take the numbers of the firing order,
White them down with the first 3 in one colum and the second three firing numbers in a colum next to the first three. The numbers across from each other are called " mating cylinders".
If #1 cylinder is ( example ) next to #6 on your paper, then those two are mating cylinders. Meaning one ( with valve cover/s off) will , when engine in turned over slowly, will be on valve overlap, while its mating cylinder is on
Top Dead Center to fire. In valve overlap, when the motor is turned slowly one way, the exhaust valve will open and when engine is slowly turned the other way, the intake valve starts to open. At that point when either exhaust or intake valve is moving on #6 cylinder valve trane, #1 is at top dead center which will be not even 180degrees out, but top dead center on #1 cylinder. Now your at the firing point of #1, which will coincide with the rotor pointing at #1 plug wire on the distributor cap. In essence, static ( not
engine running ) the rotor bug should be about 17 degrees early in the cap. This makes up for slack in any timing chain and gear slack between the distributor gear to cam gear. This when running put you about 4-6 degrees advanced. Computor models will time it for itself. See example below.
1 - 6
5 - 2
3 - 4
If your timing order is 153624 then use the chart. As you list your order on paper, remember one mating number is firing and it's mating cylinder is on valve overlap. 180 deg out would be
#1 valves " rocking " and no 6 is on compression. When a cylinder is on the compression stroke, valves will not move. ( both closed ). So, write down your timing order, v6 or inline 6, or 4 cyl or 8 cylinder. It don't matter. If you look at the manifold , it will give the timing order, maybe on the head or Internet. Two columns, walla.
Hope that helps get you to true #1 top dead center. This system is the only true way, along with a cardboard timing wheel for the crank if needed , to adjust valves, lifters and know where the engine is at all times.
Hope that helps. Sorry for the detail, engines are really very simple, once you " get the picture ". Don't make it to difficult. Crank turns two times to one revolution of the cam.
Terry

Jan 21, 2015 | Mazda Cars & Trucks

1 Answer

How do I find top dead center on all three


You only need to find top dead center on number one cylinder. Remove the spark plug, insert a stiff wire. As soon as the wire start to go down, reverse the way you turn the crankshaft, just abit. this is top dead center.

Oct 14, 2014 | Cars & Trucks

1 Answer

How do you know which valves should be open/ closed (BTDC/ATDC) on which cylinder in the head of a 4g64 sohc head to put the head in time with the crank


All of the valves in the number one cylinders should be closed when the engine marks line up at TDC (top dead center). BTDC= before top dead center, ATDC = after top dead center.

Aug 03, 2012 | Mitsubishi Cars & Trucks

1 Answer

If the distributor was pulled out how do you determine tdc on a 2003 exterra 3.3


Line up mark on main pulley with indicator, If you have a baffle over the rockers on cylinder number one, you will need to pull off that valve cover to ensure that neither valve is open- the vavle train will be resting on the heel of the cam lobes. This means cylinder number one is truly at top dead center, and distributor can be installed with the rotor in the correct location for factory designated cylinder number 1 location. ( it could fall anywhere, as long as the firing order is in the correct order- it just makes life simpler in the future.)

If one rocker or both rockers are pressing against the valve stems or followers, the engine is 180 degrees from top dead center for cylinder number one so the crankshaft must make one full revolution additional for number one to be at the timing reference top dead center for cylinder number 1 or you can simply position the distributor rotor for cylinder number 2.. This is because the crankshaft makes two full rotations for one full rotation of camshaft or distributor.

If you find you have lined up on cylinder number 2- which is 180 degrees away from cylinder number 1 in the firing order, you should have no problem if you make sure to locate number 1 in the factory designated location and use correct rotation direction when you pug the wires into the distributer cap.

Jan 30, 2012 | 2003 Nissan Xterra

1 Answer

Removed distributor didn't mark location of rotor put the distributor back in truck will not run.put the distributor in were i was sure top dead center was still will not run.how can i be sure i am at...


hawkie74542, As you are standing in front of the vehicle looking at the engine the spark plug on the right in the front is the number one cylinder. Remove the spark plug. On your crank shaft pulley find the timing mark and mark it with some whiteout or anything else that will show up well. Rotate the crankshaft clockwise until the mark lines up with zero on the timing gauge on the engine. When you have done this, with a long screwdriver check the hole where the number one spark plug was. You should not be able to put the screw driver in too far as the top of the piston should be right there at the top of the cylinder. This will get you to top dead center. The rotor should be pointing directly at the number one spark plug. Tighten the distributor down but not all the way as you will need to turn the distributor for the final timing. Replace the spark plug and wire and with a timing light finish the timing procedure. Good luck with this.

Jun 05, 2011 | 2000 Chevrolet Blazer

2 Answers

Is it top dead center or bottom


Top dead center and bottom dead center also known as ( TDC) and (BDC) Are two different positions of the piston while an engine is running. TDC is where the piston is as high as it can go in the cylinder and BDC is as low as the piston can go in the cylinder.

May 21, 2011 | Pontiac Grand Prix Cars & Trucks

1 Answer

Timingchain diagram procedure for the number one piston at top dead center


if its a straight six or four cylinder if no six valve rocking then one is on top dead centre or four cylinder 4 rocking one is on t dead centre

Sep 29, 2010 | Saturn Vue Cars & Trucks

1 Answer

What is the degree setting for a 1977 chevy malibu 305 ( 6?) and which is the number the #1 cylinder?


The timing should be set at 6 degrees before top dead center only for California emission equipped vehicles, and unless the engine code was "CCC" (check the emission label if the vehicle still has one) or had federal emissions then the ignition timing should be set at 8 degrees before top dead center. and 10 degrees before top dead center for high altitude vehicles.

The #1 cylinder is located at the front spark plug on the driver side, and here is a firing order diagram top help assist you.


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Aug 06, 2010 | Chevrolet Malibu Cars & Trucks

1 Answer

Cams need to be put back after being removed where do they go?


With the number one piston at top dead center the intake cam lobe on the number one cylinder will face 9 o'clock and the exhaust cam lobe on the number one cylinder will face 3 o'clock.

Dec 05, 2009 | 1994 Nissan Altima

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