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Where is the ignition rotor is suppose to be facing when engine isa at top dead center?

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Number one cyl and # one wire

Posted on Aug 27, 2010

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Replacing distributer suburban 1500 m 1997


HOPE YOU DIDN\'T TAKE OUT THE OLD ONE YET !!!!!!!!!! YOU MIGHT WANT READ UP ON THIS BEFORE YOU DO. BUT THERE ARE PROCEDURES, DISTRIBUTOR MUST BE MARKED, @ BASE/ENGINE BLOCK, USE PAINT, ROTOR MUST BE FACING #1 SPARK PLUG, #1 PISTON NEEDS TO BE SET @ TOP-DEAD-CENTER, ON THE COMPRESSION STROKE, NOT EXHAUST STROKE, IF YOU REMOVE THE VALVE COVER DRIVERSIDE IF V8, YOU CAN SEE #1 ROCKER ARMS. WHEN ROTATING THE ENGINE, MANUALLY W/WRENCH, BFW, BIG-FU-KIN-WRENCH, BOTH ROCKER ARMS WILL BE EVEN & LOOSE, IF YOU REMOVE #1 SPARK PLUG, THE TOP OF THE PISTON WILL BE @ TOP OF ITS STROKE, ALSO, TIMING MARKS WILL BE INLINE @ CRANKSHAFT DAMPER. @ 0, TOP DEAD CENTER. WHEN THIS OCCURS, YOUR @ TOP DEAD CENTER . DO YOU UNDERSTAND ???????? BY REMOVING ALL SPARK PLUGS IT WILL BE EASYIER TO TURN THE CRANK. ONCE YOU ACHIEVE & SATISFY ALL THE ABOVE PROCEDURES YOU CAN SET IN YOUR DISTRIBUTOR, ROTOR FACING #1 SPARK PLUG TERMINAL, THAT YOU ALSO MARKED, INSERT THE NEW DISTRIBUTOR EXACTLY LIKE YOU TOOK IT OUT, REPEAT, EXACTLY..........................GOOD LUCK!!!

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How to remove the pick-up coil from the distributor. 1989 GMC 1500 4X4


The distributor does have to be removed and dis-assembled in order to replace the ignition pick-up coil/stator, and if the pick-up coil/stator is faulty then the distributor should be replaced because the distributor will come with a new pick-up coil/stator and the old distributor will have to be removed anyway and in the long run it will actually save money from not having to pay a mechanic to remove and dis-assemble the distributor to replace the pick-up coil/stator, however most of the time it is the ignition module inside of the distributor that is faulty.




When the engine is at TDC (Top Dead Center) is the ignition rotor pointing to the #1 position on the distributor housing as described below?



The engine should be set on TDC (Top Dead Center) with the distributor cap removed, and there is a mark or notch on the distributor housing that the rotor should be pointing to when the engine is on top dead center. (Look under the distributor cap and find where the number one terminal runs under the distributor cap, and where that position on the distributor cap corresponds with the distributor housing, and it should match up to a mark or a notch on the distributor housing)

This static timing is all that matters and the computer will be able to control the timing as long as the ignition rotor is in that position when the engine is at top dead center.



If the engine is at TDC and the ignition rotor does not point to the #1 mark on the distributor housing, then loosen the hold down bolt to the distributor and turn the distributor until the rotor is pointing to the #1 mark on the distributor and then tighten the distributor hold down bolt.


6_24_2012_9_32_16_pm.jpg

Jun 24, 2012 | GMC K1500 Cars & Trucks

2 Answers

Pulled distributor on 97 chevy truck v6 and cant seem to get it back in right! wont start! got it to top dead center many times! they say put rotor to cyl #1 but do they mean #1 in cap or face rotor to...


when the engine is a top dead center on cyl one put the distributor in so the rotor points to the no1 spark plug wire trminal on the cap try that let me know if it helps

Jan 16, 2011 | 1997 Chevrolet K1500

1 Answer

Blown head gasket, replaced and now cant time. all books and web say that the vehical is not timeable it has to be done by a comp. tech 2. but we went to dealer and their tech 2 couldn't read it. i cant...


The ignition timing is not adjusted with a timing light or with the engine running, and to set the ignition timing follow these procedures.

There is a mark or notch on the distributor housing that the rotor should be pointing to when the engine is on top dead center. This "static" timing is all that matters and the computer will be able to control the timing as long as the ignition rotor is in that position when the engine is at top dead center.

1. Place the engine at top dead center.

2. Look under the distributor cap and find where the number one terminal runs under the distributor cap, and where that position on the distributor cap corresponds with the distributor housing, and it should match up to a mark or a notch on the distributor housing indicating the number one position.

3. With the engine on top dead center the ignition rotor should be pointing to the number one mark or notch that is on the distributor housing, if it is not then loosen up the distributor and turn the distributor until the ignition rotor is pointing to the mark or notch on the distributor housing and then tighten down the distributor, the engine should now be static timed.

If the distributor can not be turned enough to align the ignition rotor with the number one mark on the distributor housing, or the distributor does not set properly and will not allow the installation of the spark plug wires then the distributor is not installed correctly and is most likely a tooth off and it will need to be re-installed correctly. (The distributor should set like it is shown in the firing order diagram when it is properly installed)


Let me know if you require a firing order diagram or any further assistance.

Sep 23, 2010 | 1999 Chevrolet Silverado 1500

1 Answer

What is the timing specs for a chevy 98 suburban V8 350 gas.


The ignition timing is not adjusted with a timing light or with the engine running, and to set the ignition timing follow these proceedures.

There is a mark or notch on the distributor housing that the rotor should be pointing to when the engine is on top dead center. This "static" timing is all that matters and the computer will be able to control the timing as long as the ignition rotor is in that position when the engine is at top dead center.

1. Place the engine at top dead center.

2. Look under the distributor cap and find where the number one terminal runs under the distributor cap, and where that position on the distributor cap corresponds with the distributor housing, and it should match up to a mark or a notch on the distributor housing indicating the number one position.

3. With the engine on top dead center the ignition rotor should be pointing to the number one mark or notch that is on the distributor housing, if it is not then loosen up the distributor and turn the distributor until the ignition rotor is pointing to the mark or notch on the distributor housing and then tighten down the distributor, the engine should now be static timed.

If the distributor can not be turned enough to align the ignition rotor with the number one mark on the distributor housing, or the distributor does not set properly and will not allow the installation of the spark plug wires then the distributor is not installed correctly and is most likely a tooth off and it will need to be re-installed correctly. (The distributor should set like it is shown in the firing order diagram when it is properly installed)

Here is a firing order diagram to also help assist you.


45b5651.jpg

Aug 05, 2010 | Chevrolet Suburban 1500 Cars & Trucks

1 Answer

Installed new crate engine 1997 5.7 vortec, how do you adjust the timing? 1997 GMC Serria 4x4 1500


The ignition timing is not adjusted with a timing light or with the engine running, and to set the ignition timing follow these proceedures.

There is a mark or notch on the distributor housing that the rotor should be pointing to when the engine is on top dead center. This "static" timing is all that matters and the computer will be able to control the timing as long as the ignition rotor is in that position when the engine is at top dead center.

1. Place the engine at top dead center.

2. Look under the distributor cap and find where the number one terminal runs under the distributor cap, and where that position on the distributor cap corresponds with the distributor housing, and it should match up to a mark or a notch on the distributor housing indicating the number one position.

3. With the engine on top dead center the ignition rotor should be pointing to the number one mark or notch that is on the distributor housing, if it is not then loosen up the distributor and turn the distributor until the ignition rotor is pointing to the mark or notch on the distributor housing and then tighten down the distributor, the engine should now be static timed.

If the distributor can not be turned enough to align the ignition rotor with the number one mark on the distributor housing, or the distributor does not set properly and will not allow the installation of the spark plug wires then the distributor is not installed correctly and is most likely a tooth off and it will need to be re-installed correctly. (The distributor should set like it is shown in the firing order diagram when it is properly installed)

Here is a firing order diagram to also help assist you.


445ea9b.jpg

Jul 06, 2010 | 1997 GMC Sierra K2500

2 Answers

How to remove distributor on a 1998 gmc pick up with 5.0 engine, do I have to mark anything or just take off bolt and pull out.


You need to mark in 2 places. With the cap off mark the position of the rotor button on the distributor housing first. Then you need to make a mark on the distributor housing that will line up with a mark on the engine itself.
When you put the distributor back in back the rotor button up before you put it in because the cam gear will turn it ahead as it seats. For example, if the rotor button is at 3 o'clock then back it up to 1 o;clock.
Don't force the distributor down at the end because you can damage the end that drives the oil pump. Fidle and wiggle it as you push and it should line up and drop onto the oil pump. Also DON'T turn the engine over while it's out or you will have to retime the engine. Hope this helps.

Jul 03, 2010 | 1998 GMC Sierra

1 Answer

Cam/Crank Sensor correlation problem


Thr problem should be the static timing for the distributor, and this is how it should be set;

There is a mark or notch on the distributor housing that the rotor should be pointing to when the engine is on top dead center. This static timing is all that matters and the computer will be able to control the timing as long as the ignition rotor is in that position when the engine is at top dead center.

1. Place the engine at top dead center.

2. Look under the distributor cap and find where the number one terminal runs under the distributor cap, and where that position on the distributor cap corresponds with the distributor housing, and it should match up to a mark or a notch on the distributor housing.

3. With the engine on top dead center the ignition rotor should be pointing to the mark or notch that is on the distributor housing, if it is not then loosen up the distributor and turn the distributor until the ignition rotor is pointing to the mark or notch on the distributor housing, the engine should now be static timed.

Jun 12, 2010 | 1999 Chevrolet C2500

2 Answers

How do you set the timing on a 1998 GMC Sierra?


The timing is not adjustable and it is computer controlled, but the distributor must still be clocked in properly and static timed, and here is how it is done.

There is a mark or notch on the distributor housing that the rotor should be pointing to when the engine is on top dead center. This static timing is all that matters and the computer will be able to control the timing as long as the ignition rotor is in that position when the engine is at top dead center.

1. Place the engine at top dead center.

2. Look under the distributor cap and find where the number one terminal runs under the distributor cap, and where that position on the distributor cap corresponds with the distributor housing, and it should match up to a mark or a notch on the distributor housing.

3. With the engine on top dead center the ignition rotor should be pointing to the mark or notch that is on the distributor housing, if it is not then loosen up the distributor and turn the distributor until the ignition rotor is pointing to the mark or notch on the distributor housing, the engine should now be static timed.

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2 Answers

We need the timing specs for and 86 2.3 ford mustang


Ignition timing should be set at 10 degrees BTDC (before top dead center), with vacuum advance hose disconnected and plugged, engine idling at 800 rpm or less.

Jan 10, 2010 | 1986 Ford Mustang

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