Question about 2000 GMC Jimmy

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Where are the timing marks on a 2000 gmc jimmy to put it at top dead center

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Is this a 4.3 V6 or ? You will have to get some carb cleaner and a rag and wipe the grease off of the timing mark plate on the timing chain cover of the front of the engine next to your harmonic balance.

Posted on Feb 01, 2010

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Look in front of motor, down to where harmonic balancer is on the front of motor, should be a timing tab on timing chain cover, pull no1 plug out, hold finger on the spark plug hole or put a rag in the hole just enough to get it to blow out, bump motor over a little at a time when the no 1 piston comes up on compression stoke, it will blow rag out of hole, or it will blow out around your finger, you might have to put wrench on balancer to turn motor a little,stick screw driver in hole to see if piston is high as it will go, pull distributator cap, see if rotor button is pointing to number one plug wire on the cap, also check balancer to see if any marks are showing, somewhere on the tab on timing chain cover, if so should be in time or close, you may have to put timing light on it

Posted on Feb 01, 2010

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SOURCE: What mark should i look for to see if i am top

On the harmonic balancer there will be a line going across the width of the balancer, on the timing cover, at about 2 o'clock, there will be an arrow that you will line up the line to. The rotor in the distributor should then line up with the "6" on the distributor housing.

Posted on Apr 24, 2010

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1 Answer

Can not get the timing set on 1998 GMC Jimmy 4.3 4x4


oh boy . here we go. this is the hardest timing to set. first lets do it the easy way. pull off the valve cover on the drivers side. why do it. well there is a exhaust top dead center and intake top dead center. on the harmonic balancer has two marks. you want the second make. when you are turning the motor by hand watch the marks and watch to see when the intake valve is at the top.now when you put the distributor in the number 6 on the distributor will be at where the number 1 spark plug ,but the rotor will be pointed between 1 and 5. i have done so many head gaskets on these motor. I have pictures I am going to find and help you

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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.

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1 Answer

What mark should i look for to see if i am top dead center on the pulley for a 2000 GMC Jimmy


On the harmonic balancer there will be a line going across the width of the balancer, on the timing cover, at about 2 o'clock, there will be an arrow that you will line up the line to. The rotor in the distributor should then line up with the "6" on the distributor housing.

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4 Answers

Timing mark problem. 92 jimmy.


Get a piece of sand paper or a wire brush it wont ware the numbers off they are engraved/stamped on there.
If not you can try timing it by ear just loosen your distributor and make small adjustments after each adjustment take it for a drive you will know when you got it right.

Jan 29, 2010 | 1992 GMC Jimmy

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Replacing distributor and I lost the position of the rotor and truck wont start... do I need to take #1 cyl to top? and the aline rotor?


Yes, when cyclinder one is at top, the rotor should be pointing towards the #1 spark plug wire

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1 Answer

Put motor in a 1998 gmc jimmy and can't seem to get the timming correct to start vehicle.


you r gonna have to bring cyl. #1 to top dead center and reinstall the distrbutor in the correct position. normally the dist.rotor will pointing toward #1 cyl.

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On the first cylinder (first closes one of right side). After plug is removed, turn motor until piston is at very top of cylinder.

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1 Answer

1989 gmc jimmy, no spark


Take your distributor off and see if the rotor is turning when it is being cranked.If the rotor don,t move then your distributor is bad. If it is then pull #1 plug out and put your finger over the hole and crank Intel you feel air coming to your finger. bring it up slowly and check your timing mark. Make sure the #1 is at the very top center. Your timing marks should line up. If it don,t then you jumped time.

Apr 06, 2009 | 1989 GMC S-15 Jimmy

1 Answer

Set timing 1997 jimmy


Ok that's pretty simple Put cylinder # 1 on TDC= top dead center on the (compressionstroke piston all the way up). Mark on metal part of distributor (with marker) where the number one is on the cap( that's where the number 1 wire plugs in) Then in-plant distributor make sure that rotor point is pointed to #1 on the cap, turn distributor shaft until this is achieved or as close as possible try to center shaft so you can adjust... ****** or advance to fine tune after you in-plant distributor if needed. Contact if you need more help . Good Luck

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