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When I bring the piston to TDC should I see which way the rotor in the distributor is pointing to make sure it is pointing at the #1 plug before moving the distributor

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Sorry, but there seems to be something confusing here. With the engine at TDC and the rotor pointing at the #1 position, moving the distributor would achieve nothing more than throwing the timing out. To do ignition timing you heed a timing light and the engine running, then you use the timing marks on the pulley and the front case to set the distributor to the correct number of degrees before TDC as per the manual.

Posted on Mar 14, 2011


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what will happen , you will be in all sorts of bother
try this , remove the spark plugs then bring number 1 piston up on compression until the timing marks read tdc
remove the distributor cap and see if the rotor button is pointing to no 1 plug lead
directly under the center of the rotor button line , using a small triangular file and file a small nick in the edge of the distributor body if there is not already a mark there
remove all wires to the distributor . undo the single nut that holds the distributor clam to the block and lift the distributor out
note which way the rotor button turns as you will have to position it before the mark when reinstalling so that the rotor button ends back up at your mark on the body
points to remember--- no 1 piton has to be at tdc compression stroke and the rotor button has to be at your mark or existing mark to get it all right on assembly

Dec 21, 2016 | Cars & Trucks

1 Answer

IVE GOT TDC on #1 now do I put the distributer rotor pointing toward #1?

It depends which tdc ... Remember that the piston will be at TDC on both the compression and exhaust stroke.

If you turn a distributor to point the rotor rotor arm at no 1 terminal on the exhaust stroke, your timing is 180 degrees out.

Other wise yes, point the rotor arm at No1 terminal.

To check which TDC it is.. place your finger over the no 1 spark plug hole and get somebody to turn the engine for you. You'll feel the compression build up.

Mar 11, 2016 | Cars & Trucks

1 Answer

Rotor cap finding number one on distributor cap on chevy s10 4.3

bring the no 1 piston up on compression stroke to TDC the rotor button will be pointing to no 1 plug HT lead point

Nov 22, 2015 | Cars & Trucks

1 Answer

How to reset timing on 1992 454 tbi after replacing distributer

You have to put the number 1 cylinder at Top Dead Center of the compression stroke, and then you install the distributor with the rotor pointing to the #1 spark plug wire tower that is on the distributor cap.

Pull the spark plug from number 1 cylinder. You need a helper to turn the engine over by hand (using a socket on the crank pulley), or he can bump the starter over in very short bursts. Put your finger over the spark plug hole. When the piston is rising on the compression stroke, you will feel air pressure on your finger. Now look at the crank pulley and turn the engine on over until the zero degrees mark lines up on the timing pointer. Or you can stick a long straw or similar into the spark plug hole (don't let it drop into the cylinder!) to feel when the piston is at top of travel...see, you feel for pressure build up with finger (piston is rising on compression stroke), when you feel it, turn engine on over by hand until the piston is at top of travel-that is TDC of compression stroke. Now install distributor so that rotor ends up pointing directly to number 1 spark plug wire tower. Then follow firing order -as the rotor turns, it will follow the firing order around the dist. cap.
There are two top dead centers of each piston, tdc of compression stroke and tdc of exhaust stroke- to time the engine, you need tdc of compression-that is when the spark plug fires in the cylinder, so that is when you want the distributor in with the rotor pointing to #1.

Jul 28, 2014 | 1992 Chevrolet C/K 3500

1 Answer

How do I find the #1plug wire on dis distributor?

remove the no 1 plug and bring the piston up until you have a pressure under the finger. Position the timing mark at the TDC point . The rotor button will be pointing to the NO1 plug lead in the distributor cap.

Dec 14, 2013 | Cars & Trucks

1 Answer

Position no 1 plug wire on distributor cap 300 6 cyl ford

Quick easy check, is to remove No 1 spark plug, rotate engine by hand to bring No1 piston to T.D.C, (with valves rocking ) remove dissy cap and check position of rotor, the segment of the dissy cap that the rotor is pointing at will be No 1 Cheers

Oct 20, 2012 | Cars & Trucks

1 Answer

I am having problemsseting the distributor on a 1996 chevy 305. this is a new motor . do i set the pointer at # 6 or # 1

The distributor rotor must point to the post on the cap of the cylinder that is firing. In your case, if #6 is at TDC of the compression stroke, than the pointer must point to the distributor cap post of the #6 cylinder wire. But I must tell you that if you have TDC on #1, and rotate the crankshaft 360 degrees, #1 will be at TDC again...

Jan 31, 2012 | Chevrolet Cars & Trucks

1 Answer

I replace the oil pump gasket. need to redo timing of the engine cause it wont start, it has a distributor. which timing mark ( has about 6 marks)on the crankshaft pulley and does it align with the pointer...

didnt i answer this one ,but you never stated a distributor ,easy take no1 plug out ,bring up to to TDC no1 and rotor points at no1 plug point on the distributor cap.if it doesnt start then you could be 180? out which is why its better to remove rocker cover but not necessary

Jan 01, 2011 | 1998 Nissan Frontier

2 Answers

Replaced distributor and new one would not line up. Lined up rotor as best I could and tried to start. Ran rough and horn beeped twice!. Removed, put at TDC and lined up rotor with #1 plug. Now engine...

wow the engine timing is definatly off. first things first are you sure you have correct replacement distributor? you may have the timing 180 degrees off, the easiest way to set tdc is remove #1 spark plug insert long handle screw driver and then line up 0 degree timing mark on crank shaft pulley to timing cover while watching screwdriver to raising as high as possible, this is ensuring that the #1 piston is all the way up. now you are surely on tdc. at this point remove distributor cap and se what cylinder # the rotor is pointing to. the firing order is 1,5,3,6,2,4 with the rotor moving in a clockwise motion here is a picture to help.cables.jpg if the rotor is not pointing which i doubt it will be remove distributor and re install with rotor pointing towards cyl. #1. hopr this was helpful if so please rate positive.

Dec 04, 2010 | 1993 Jeep Grand Cherokee

1 Answer

1985 PLy Horizon distributor rotor position

Find the end of the plug wire for cylinder 1. Place the plug wire into the distributor cap. Rotate the Crankshaft until Cylinder #1 is TDC. align the rotor in the distributor cap with plug wire number 1.

Nov 23, 2008 | 1985 Plymouth Horizon

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