Ran rough, shut off, making loud noise and will not start

Hi,

Can you describe the noise you heard? Was it a knocking sound? Also, can you record the engine cranking so I can hear it?

If it isn't starting, it can be several different things. Here is a link that explains the most common causes or a crank no start. Take a look through it and see if it helps. However, the noise you heard has me a bit concerned.

https://www.2carpros.com/articles/car-cranks-but-wont-start

Let me know if that helps and if you could record it cranking.

Take care,
Joe

Two things. First, can you get a quick video of what it sounds like cranking?

Then we need to drain the oil and inspect for metal. If you find metal then we may have larger engine issues.

If there is no metal then the engine is just missing very badly which is why it is making noise and not running well.

However, I am concerned with this progression that we have a larger engine issue.

https://www.2carpros.com/articles/car-cranks-but-wont-start

If there is no metal, then fill it with the proper amount of oil and run through the guide above. We need fuel, spark and compression to start the engine.

If it sounds like you have no compression then we need to check it.

https://www.2carpros.com/articles/how-to-test-engine-compression

If that checks out, then use starter fluid in the intake and see if it starts. If not, we need to check for spark.

Let's start here and go from there. Thanks

It sounds like the timing chain needs replaced. I would remove the timing chain cover and inspect.

Here are directions for replacing it:

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2000 Jeep Truck Grand Cherokee 2WD L6-4.0L VIN S
Timing Chain
Vehicle Engine, Cooling and Exhaust Engine Timing Components Timing Chain Service and Repair Procedures Timing Chain
TIMING CHAIN
REMOVAL
1. Disconnect negative cable from battery.
2. Remove the fan and shroud.
3. Remove the serpentine drive belt.
4. Remove the crankshaft vibration damper.
5. Remove the timing case cover.

Pic 1

Fig. 58

6. Rotate crankshaft until the "0" timing mark is closest to and on the center line with camshaft sprocket timing mark (Fig. 58).
7. Remove the oil slinger from the crankshaft.

Pic 2

Fig. 59

8. Remove the camshaft sprocket bolt and washer (Fig. 59).
9. Remove the crankshaft sprocket, camshaft sprocket and timing chain as an assembly.
10. Installation of the timing chain with the timing marks on the crankshaft and camshaft sprockets properly aligned ensures correct valve timing. A worn or stretched timing chain will adversely affect valve timing. If the timing chain deflects more than 12.7 mm (1/2 inch) replace it.

INSTALLATION
Assemble the timing chain, crankshaft sprocket and camshaft sprocket with the timing marks aligned (Fig. 58).
1. Apply Mopar Silicone Rubber Adhesive Sealant to the keyway in the crankshaft and insert the key. With the key in the keyway on the crankshaft, install the assembly on the crankshaft and camshaft.
2. Install the camshaft sprocket bolt and washer (Fig. 59). Tighten the bolt to 68 Nm (50 ft. Lbs.) Torque.
3. To verify correct installation of the timing chain, rotate the crankshaft 2 revolutions. The camshaft and crankshaft sprocket timing mark should align (Fig. 58).
4. Install the crankshaft oil slinger.
5. Replace the oil seal in the timing case cover.
6. Install the timing case cover and gasket.
7. With the key installed in the crankshaft keyway, install the vibration damper, washer and bolt. Lubricate and tighten the bolt to 108 Nm (80 ft. Lbs.) Torque.
8. Install the serpentine drive belt.
9. Install the fan and hub assembly. Install the shroud.
10. Connect negative cable to battery.

__________________________

Let me know what you find or if you have other questions.

Take care,
Joe

Hi,

Did you replace the timing chain? Also, can you record the engine cranking so we can hear it?

Joe

I would see if the chain gets it running first before putting too much into it. However, I don't think I would push it off a cliff. LOL

Is it possible for you to record it cranking and upload it for me to hear?

Let me know. Also, let me know if you need help with anything.

Joe

No, that isn't a dumb question. Anything is possible.

If you are worried about ignition spark from the plugs, simply disconnect the ignition coil rail and isolate the connector. (See pic 1)

Not being there, I'm not sure how much fuel you are referring to. But if it is spark from the plugs that is the concern, disconnecting the coils will stop that from happening.

Let me know.

Joe

Happy to help. Let me know what you find. I'm interested in hearing it crank.

Take care,
Joe