Question about 1996 Chevrolet Tahoe

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Engine wont turn over

I replaced my 5.7 liter engine with one i bought from a friend his truck caught fire and the intake and distributor and wires were burned so i replaced them with parts off my trucks engine(same) well when i was installing the distributor and lining the timing mark the the v-groove mark i noticed the crank was hard to turn so i used a pipe and breaker bar and turn it ,but it would only turn about 45 degrees clockwise and the about 45 degrees counter clockwise after diong this about 5-6 times each way it started to make a complete 360 degree turn the i noticed rust color water coming out of a few cylinders, after a few more turns it was fine so i installed the engine in the truck and when i tryed to start the engine it would turn over but not fire up , so i figured the timing was off from replacing the distributor so i waited until the next day to continue and to my suprise the engine wont turn over , so i tryed to turn the crank with a breaker bar and this time it wont move either way , do you have any cllue of what is going on?? also could the water have gotten into the engine when the fire was put out

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  • kenneth richardson May 28, 2009

    i tryed to turn the crank so i can put the #1 piston to TDC but the engine wont turn over. the last time i tok the spark plugs out and turn it with a breaker bar ,some water came out of a few cylinders and it started tuning over fine but today it wont move agian

  • yadayada
    yadayada May 11, 2010

    You have verified that when the number one cylinder is on TDC both valves closed that the rotor is pointed at number one cylinder plug wire teminal on the distributor cap? are u sure you have fuel pressure, what is the fuel pressure psi?

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You are going to have to pull the cylinder heads off and check this water problem out.

Posted on May 28, 2009

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The engine sounds like it's seized. Because there was water in the engine it most likely has rusted the cyclinder walls. Now you still may get it to work. Drain the oil from the engine, pull all spark plugs and put automatic tranny fluid in each of the cyclinders (try to get enough in to cover the piston) this will seep down to the rings and loosen any rust holding the piston. Wait a couple of days, after about 8 hours try to hand crank the engine again like you did before ( leave the plugs out). When you can turn if somewhat freely try to turn it over with the starter (plugs still out) now this will make a mess because oil will shoot out plug hole but you'll have saved the engine. When it cranks like normal fill oil, clean the engine compartment lol. and put plugs in. on first start there will be lots of blue smoke because of the oil in the cyclinders but this will burn off in time. Good luck.

Posted on May 28, 2009

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1 Answer

Diagram spark plug wiring


my guess, is you removed them and didnt mark them?
the firing order?
what engine, there are 5.

to do this , one need to know 5 things.
2.5L, 2.8L, 4.0L and 5.2/5.9L engine displacements.
the distributor rotation direction CCW, or CW
and last the firing order, sometimes marked clearly on the intake manifold.
you must now where #1 cylinder is (always most front)
1989-98 2.5L Engine firing order: 1-3-4-2 Distributor rotation: Clockwise
2.8L Engine firing order: 1-2-3-4-5-6 Distributor rotation: Clockwise
4.0L Engine firing order: 1-5-3-6-2-4 Distributor rotation: Clockwise
5.2L and 5.9L Engine firing order: 1-8-4-3-6-5-7-2 Distributor rotation: Clockwise
on a v6/v8 one cylinder is more forward. this is #1, look carefully.

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FIRING ORDERS
NOTE: To avoid confusion, tag and remove the spark plug wires
one at a time, for replacement.

If a distributor is not keyed for installation with only one orientation, it
could have been removed previously and rewired. The resultant wiring would hold
the correct firing order, but could change the relative placement of the plug
towers in relation to the engine. For this reason it is imperative that you
label all wires before disconnecting any of them. Also, before removal, compare
the current wiring with the accompanying illustrations. If the current wiring
does not match, make notes in your book to reflect how your engine is wired.





Fig. 1: The firing order can usually be found cast onto the
intake manifold
91072p23.jpg






Fig. 2: 1984-88 2.5L engine Engine firing order: 1-3-4-2
Distributor rotation: Clockwise
86742ga3.gif






Fig. 3: 1989-98 2.5L engine Engine firing order: 1-3-4-2
Distributor rotation: Clockwise
86742ga2.gif






Fig. 4: 2.8L engine Engine firing order: 1-2-3-4-5-6
Distributor rotation: Clockwise
86742ga4.gif






Fig. 5: 4.0L engine Engine firing order: 1-5-3-6-2-4
Distributor rotation: Clockwise
86742ga1.gif






Fig. 6: 5.2L and 5.9L engines Engine firing order:
1-8-4-3-6-5-7-2 Distributor rotation: Clockwise
86742ga5.gif



prev.gif next.gif

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c2d787b.gif

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This method is good for the firing order on all chevy small block v8 engines from 265 cubic inches to 400 cubic inches. This would include 265, 283, 305, 327, 350, 400 cu. in. chevy small block v8 engines.

Let's cover some safety concerns first. If you try to troubleshoot a mixed up firing order with the engine running, you could be in for a serious shock,.. literally. You can do it, with certain precautions, but you really don't need to check the firing order with the engine running. You definitely don't want to try checking the firing order if you are wearing any kind of pacemaker or sensitive electromechanical prosthesis. The voltage coming out of the ignition coil is in the thousands. Common sense dictates that you wouldn't stick a knife in an electrical outlet, so you wouldn't want to take chances with being shocked by the electrical discharge from your classic chevy's ignition coil either. See the diagram:


5d6424a.png

The firing order, which should be cast into the intake manifold, for the chevy small block V8 is 1-8-4-3-6-5-7-2. The firing order is the numerical sequence in which the spark plugs are fired. The insertion position of each spark plug wire around the circumference of the distributor cap can be found according to a clock face. The insertion sequence determines the firing order. The firing order is followed clockwise around the distributor cap starting from the 6:30 position with the 6:30 position being the number one cylinder spark plug wire.

On classic chevy small block engines that use ignition breaker points instead of electronic ignitions, the number one cylinder is the one immediately clockwise of the small metal sash cover on the distributor cap. The firing order starts here. There is no sash cover on the distributor cap for GM HEI electronic ignitions, and the firing order is the same, but starting at the 5:30 position.
The firing order makes sense if you know how the cylinders are numbered. The number one cylinder is the front most on the drivers side and 2 being the front most on the passenger side. From front to back, the cylinders are odd numbered on the drivers side, and even numbered on the passenger side.

Additional details HERE.

Hope helps (remmeber rated this).

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1 Answer

1995 Mazda 626 -what is the firing order on a 2,5lt engine? I have # one turned to the top and the timing mark on the crank is right on but the rotor is on #6 plug. Doesn't make sense to me. When I turn it...


I read that the firing order was '1,2,3,4,5,6' which is easy to remember: prev.gif next.gif FIRING ORDERS NOTE: To avoid confusion, remove and tag the spark plug wires one at a time, for replacement. If a distributor is not keyed for installation with only one orientation, it could have been removed previously and rewired. The resultant wiring would hold the correct firing order, but could change the relative placement of the plug towers in relation to the engine. For this reason it is imperative that you label all wires before disconnecting any of them. Also, before removal, compare the current wiring with the accompanying illustrations. If the current wiring does not match, make notes in your book to reflect how your engine is wired. Fig. 1: 1.5L, 1.6L, 1.8L (except K8) and 2.2L Engines Firing order: 1–3–4–2 Distributor rotation: Counterclockwise 89542g14.gif
Fig. 2: 1993–97 2.0L Engine Firing order: 1–3–4–2 Distributor rotation: Clockwise 89542g15.gif
Fig. 3: 1998 2.0L Engine Firing order: 1–3–4–2 Distributorless Ignition System 89542g16.gif
Fig. 4: 1.8L (K8) and 2.5L (except 1998 626) Engines Firing order: 1–2–3–4–5–6 Distributor rotation: Counterclockwise 89542g17.gif
Fig. 5: 1998 2.5L (626) Engine Firing order: 1–2–3–4–5–6 Distributorless Ignition System 89542g18.gif
Fig. 6: 2.3L Engine Firing order: 1–2–3–4–5–6 Distributorless Ignition System 89542g19.gif

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Firing order diagram for 1998 Jeep Cherokee Sport


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To avoid confusion, tag and remove the spark plug wires one at a time, for replacement.
If a distributor is not keyed for installation with only one orientation, it could have been removed previously and rewired. The resultant wiring would hold the correct firing order, but could change the relative placement of the plug towers in relation to the engine. For this reason it is imperative that you label all wires before disconnecting any of them. Also, before removal, compare the current wiring with the accompanying illustrations. If the current wiring does not match, make notes to reflect how your engine is wired.

3359c2a.jpg

Fig. 1: The firing order can usually be found cast onto the intake manifold

b83cce1.jpg

Fig.: 1989-98 2.5L engine Engine firing order: 1-3-4-2 Distributor rotation: Clockwise

15d7835.jpg

Fig.: 2.8L engine Engine firing order: 1-2-3-4-5-6 Distributor rotation: Clockwise

ee028ff.jpg

Fig.: 4.0L engine Engine firing order: 1-5-3-6-2-4 Distributor rotation: Clockwise

226e0b9.jpg

Fig.: 5.2L and 5.9L engines Engine firing order: 1-8-4-3-6-5-7-2 Distributor rotation: Clockwise

Also, here can review the Jeep XJ Service Manual.

I hope help you with this, Good luck (remember rated this help).

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3f891cd.jpg

Fig. 1: 5.8L engine-nl-> Firing order: 1-3-7-2-6-5-4-8-nl-> Distributor rotation: Counterclockwise

4d7cb6a.jpg

Fig. 2: 4.9L engine-nl-> Firing order: 1-5-3-6-2-4-nl-> Distributor rotation: Clockwise

4670971.jpg

Fig. 3: 5.0L and 7.5L engines -nl-> Firing order: 1-5-4-2-6-3-7-8-nl-> Distributor rotation: Counterclockwise

e2e0c7b.jpg

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