No, the Grand Cherokee uses a timing chain which will most likely never need replaced, they are extremely durable.

about 400 dollars at dealer however if it breaks on you it can cost you 2000 dollars, that's right i said 2000 dollars!!!! i know from experience, it screwed up my engine royally, also finding out its 200 for alternator, will never buy a piece of junk like this ever again!!!!!!! and yes it is a 2004 says you should replace timing belt every 30 thousand miles, that's 400 dollars you have to spend every 30 thousand miles

Back on the Chain Gang - The Pretenders

Chain of Fools - Aretha Franklin

Unchained Melody - The Rightous Brothers

The Chain - Fleetwood Mac

There are two things to consider here. First, where is the camshaft located in your engine, and second, is it an interference setup. If you don't know what either of these things mean you should take the car in and have it repaired. Nothing personal, but it takes years of training and experience to be any good at this.

Every stock in-block cam engine I've ever worked has not been interference, which means there's no valve damage if the chain or belt breaks. So you can simply follow the repair procedure and replace the timing components.

On an overhead valve engine that is not interference, again the timing belt or chain can be replaced - there shouldn't be any other damage.

Now the fun part. If it is an interference engine and the engine was running when the belt or chain failed, it will likely need a few valves if not a cylinder head. You can determine if there was damage by a visual inspection or by performing a leakdown test on each cylinder with the camshaft bearing caps loosened and the valves closed. Obviously any damaged parts have to be replaced. If there was damage to any valves it is also important to measure the piston to deck height on each cylinder. It is possible to bend a connecting rod when the piston contacts a valve, especially if the valve head broke off and jammed in the cylinder (this also usually makes a nice crater in the piston). I've seen cylinder heads replaced where the tech neglected to take this measurement. It was only a matter of a couple hundred miles before the damaged connecting rod let go and caused catastrophic engine damage.

If The Timing Belt Turns The Camshaft, Which It Does. And The Belt Is Broken The Camshaft Will Not Open And Close The Valves . IT CAN NOT START OR RUN> No. It might start but wont run very well because it wont know when to fire with out the timing belt.

A dirty air filter will cause a lost of power, also a clogged fuel filter will - Yes there are timing marks - but they are on the injector pump & usally don't change unless the hold down is lose. A good injector cleaner is a good idea to use when you fill-up.

While the manufacturer has not recommended a mileage interval for changing the timing belt on a 1998 Ford Contour, experienced technicians recommend changing the belt at 60,000 miles, according to Autodata's timing belt book. The engine is an interference engine, which means that should the timing belt stretch past its useful life or break, the valves will most likely contact the pistons, causing extreme engine damage. This procedure uses special tools that are available at the dealership.

1.

Step 1

Disconnect the battery ground cable, using a wrench. Raise the front of the Contour with the floor jack, then support it with jack stands. Remove the right-front wheel, using the lug wrench. Remove the lower splash guard for the engine and the right, inner fender lower splash guard.

2.

Step 2

Mark the direction of rotation on the accessory belt, using chalk or correction fluid to draw an arrow. Loosen the accessory belt tensioner with a wrench, then remove the accessory drive belt. Unbolt and remove the water pump pulley and the accessory drive belt tensioner, using the appropriate size sockets.

3.

Step 3

Loosen the crankshaft pulley bolt. Number the spark plug wires so you know where they go when you replace them. Pull the spark plug wires of the plugs, then remove the spark plugs. Carefully slide the screwdriver into the number 1 piston hole until it contacts the piston. Turn the crankshaft until you feel the piston (via the screwdriver) come all the way to the top of the piston bore. At the same time, watch the timing marks on the crankshaft. The engine is on top dead center when the mark on the crankshaft pulley lines up with the mark on the 5 o'clock position on the block, next to the crankshaft pulley. If the marks line up, but the piston is not all the way to the top of the bore, turn the crankshaft once more and everything will line up.

4.

Step 4

Remove the crankshaft pulley bolt and the crankshaft pulley, using the appropriate sockets. Make sure the crankshaft does not turn while you are removing the pulley. If it does, repeat Step 3. Remove the lower timing belt cover.

5.

Step 5

Loosen the bolts on the left and right engine mounts. Do not remove the bolts--they need only to be loosened enough so that the engine can move a little bit. Unbolt the radiator overflow tank, but do not disconnect the hoses. Lay the overflow tank out of the way. Disconnect the cruise control cable with the appropriate socket or wrench. The cruise control cable is located on the throttle.

6.

Step 6

Support the engine by placing the 2-by-4-inch board on the floor jack. Slide the floor jack under the engine and jack it up until it contacts the bottom of the engine. Remove the front engine mount, using the appropriate socket.

7.

Step 7

Remove the power steering pipe bracket, the upper timing belt cover and the front engine mount bracket, using the appropriate sockets. Disconnect the accelerator cable and the cruise control cable from the valve cover. Remove the valve cover.

8.

Step 8

Slide the camshaft alignment tool into the slots at the rear of the camshafts. Loosen the tensioner bolt, but do not remove it. Turn the tensioner clockwise with the appropriate-size Allen wrench, releasing tension on the belt. Unscrew the tensioner retaining bolt four turns. Unhook the tensioner bracket from the metal clip behind the tensioner.

9.

Step 9

Remove the plug from the center of the exhaust side camshaft (the right camshaft when you are looking down at the engine) by unscrewing it. Using the appropriate wrench, hold the camshaft by putting the wrench on the hexagon-shaped end of the camshaft where you removed the plug. Loosen the retaining bolts on both camshaft sprockets. Remove the timing belt. Check the valve on the number 4 cylinder. The camshaft lobe should be facing inward.

10.

Step 10

Install the crankshaft pulley, making sure the notch and the pointer are lined up. Remove the plug from the engine block, next to the motor mount bracket. Install the crankshaft timing pin. Adjust the crankshaft until it rests against the timing pin. Make sure all the timing marks stay lined up. Remove the crankshaft pulley.

11.

Step 11

Install the new timing belt around the crankshaft sprocket, working your way counterclockwise, keeping the timing belt tight on the side opposite the tensioner. The timing belt route goes on the inside of the two idler pulleys, then around the outside of the camshafts and the inside of the tensioner. Check to be sure the crankshaft is still pushed up against the timing pin. Hook the tensioner bracket on the metal clip.

12.

Step 12

Turn the tensioner counterclockwise with the appropriate-size Allen wrench, until the pointer is lined up with the mark located halfway between the 12 o'clock and 1 o'clock position. Tighten the tensioner bolt to 18.5 ft-lbs. of torque, then remove the Allen wrench.

13.

Step 13

Hold the camshaft by putting a wrench on the hexagon part of the shaft. Tighten the intake sprocket retaining bolt to 50 ft-lbs. of torque. Tighten the exhaust sprocket retaining bolt to 44 ft-lbs. of torque. Remove the crankshaft timing pin and the camshaft alignment tools.

14.

Step 14

Hold the exhaust camshaft by placing a wrench on the hexagon part of the camshaft. Torque the exhaust sprocket retaining bolt to 89 ft-lbs. of torque. Turn the crankshaft almost two turns (slowly). Reinstall the crankshaft timing pin. Turn the crankshaft clockwise until it touches the timing pin. Reinstall the camshaft tool in the camshaft slots to make sure it slides in smoothly. If it doesn't, remove the belt and repeat the procedure.

15.

Step 15

Remove the camshaft tool and the crankshaft timing pin. Install a new plug into the exhaust camshaft sprocket and torque the plug to 27 ft-lbs. of torque. Install the plug into the crankshaft timing pin hole and tighten it to 18.5 ft-lbs. of torque. Install the rest of the parts in reverse order of removal. Tighten the crankshaft pulley bolt to 85 ft-lbs. of torque.

Labor Times - hrs

Remove & Install:

Contour/Mystique 3.40

Cougar/Escort 2.70

Special Tools

Camshaft alignment tool - No. 303-465 (T94P6256CH).

Crankshaft timing pin - No. 303-574 (T97P6000A).

Remove spark plugs to ease turing engine.

Turn crankshaft in normal direction of rotation (unless otherwise stated).

Do NOT turn crankshaft via camshaft or other sprockets.

Observe all tightening torques.

Removal:

1. Raise and support the front of vehicle.

2. Remove:

Right hand front wheel.

Engine lower splash guard - if fitted.

Right hand inner fender lower splash guard.

Accesory drive belt.

NOTE: If the accesory belt is to be re-used,

mark the direction of rptation on belt with chalk.

Water pump pulley.

Acessory drive belt tensioner.

Speical Precautions:

Disconnect battery ground cable.

Do NOT turn crankshaft or camshaft with timing belt removed.

3. Loosen the crank shaft pulley bolt 1.

4. Turn crankshaft clockwise until No.1 cylinder at TDC of compression stroke with notch and pointer aligned 2.

5. Remove:

Crankshaft pulley bolt 1.

Crankshaft pulley 3.

NOTE: DO NOT turn the crankshaft when removing the crankshaft pulley.

Timing belt lower cover 4.

6. Loosen bolts of left hand and right hand engine mounts to allow engine to move slightly.

7. Lower vehicle.

8. Move the coolant expansion tank aside (leave hoses connected).

9. Disconnect cruise control cable.

10. Support the engine using a jack.

11. Remove:

Front engine mount.

PAS pipe bracket.

Upper timing belt cover 5.

Front engine mount bracket 6.

12. Disconnect accelerator cable and cruise conrol cables from cylinder head cover.

13. Remove:

Spark plugs cover.

Spark plug wires.

Cylinder head cover.

14. Install camshaft alignment tool No.303-465 (T94P6256CH) into slots at rear of camshafts 7.

15. Loosen the tensioner retaining bolt 8.

16. Using suitable Allen wrench, turn the tensioner clockwise to release tension from belt 9.

17.Undo the tenisoner retaining bolt four turns 8.

18. Unhook the tensioner bracket from the metal clip 10.

19. Remove plug from exhaust camshaft sprocket 11.

20. Using a wrench on hexagon to hold camshafts 12, loosen camshaft sprocket retaining bolts 13 & 14.

Attention To Removal Step #20 is critical to proper installation!

21. Remove and discard timing belt.

NOTE: DO NOT reinstall used belt. Timing belt must always be renewed once it had been loosened or removed.

IMPORTANT: To maximize Timing Belt System performance...it is recommended that Timing Belt Tenionser(s) and Idler(s) be replaced at the same time as Timing Belts!

Installation:

NOTE: The lower guide pulley may not be fitted to some models a after 06/1999.

1. Ensure camshaft alignment tool installed correctly 7.

NOTE: Valves for No.4 cylinder should be on 'overlap' (camshaft lobes facing inward).

2. Temporarily install crankshaft pulley 3.

3. Check that the notch and pointer are alligned 2.

4. Remove plug from cylinder block 15 and install crankshaft timing pin 16

No.303-574 (T97P6000A).

5. Adjust position of crankshaft until it rest against timing pin.

NOTE: No.1 cylinder must be at TDC of compression stroke and timing marks aligned 2.

6. Remove crankshaft pulley.

NOTE: Under normal circumstances, the variable valve timing system will not return to its original base position. Ensure adjustable exhaust camshaft sprocket is reset as follows:

Ensure camshaft alignment tool installed 7.

Lightly tighten the camshaft sprocket bolt 14, to prevent sprocket hub turning on camshaft.

Turn the exhaust camshaft sprocket by hand fully counterclockwise.

Loosen the camshaft sprocket bolt 14.

Ensure the sprocket moves freely on the camshaft.

Turn sprocket until hole and largelug of sprocket hub at top.

7. Type A:

Ensure the tensioner bracket is unhooked from metal clip 10 and is at the 4 o'clock position 17.

Align 6mm Allen wrench hole 18 with the 'U' shaped notch in the pointer 19.

8. Type B:

Ensure the tensioner bracket is unhooked from metal clip 10.

9. Install the new timing belt in a counterclockwise direction starting at the crankshaft sprocket, ensure timing belt taut between sprocets on non-tensioned side.

10. Ensure crankshaft remains resting against timing pin 16 during the tensioning procedure.

11. Type A:

Hook the tensioner bracket 17 into the metal clip 10.

Position the 6mm Allen wrench hole 18 at the 4 o'clock position. Finger tighten the tensioner bolt 8.

Turn the tensioner counterclockwise 20 until 'U' shaped notch in the pointer 19 aligned with mark on bracket 17.

Hold the tensioner pulley in position.

12 Type B:

Hook the tensioner bracket into the metal clip 10 and finger tighten the tensioner bolt 8.

Turn the tensioner counterclockwise 21 until the tip of the pointer 22 aligned with the mark 23.

Hold the tensioner pulley in position.

13. Torque the tensioner bolt 8 to 18.5 ft. lbs.

14. Remove Allen wrench.

15. Use a wrench on the hexagon of each camshaft to prevent camshafts from turing 12.

16. Torque the intake sprocket retaining bolt 13 to 50 ft. lbs. and exhaust sprocket retaining bolt 14 to 44 ft. lbs.

17. Remove the crankshaft timing pin 16 and camshaft alignment tool 7.

18. Hold exhaust camshaft using wrench on hexagon 12.

19. Torque the exhuast sprocket retaining bolt 14 to 89 ft. lbs.

20. Turn crankshaft slowly almost two turns clockwise.

21. Install crankshaft timing pin 16.

22. Turn crankshaft clockwise until it rests against timing pin.

23. Check that camshaft alignment tool fits smoothly into both camshaft

slots 7.

24. If not, repeat installation and tensioning procedure.

25. Remove timing pin and camshaft alignment tool.

26. Install a new plug into exhaust camshaft sprocket 11 and torque to 27 ft. lbs.

27. Install plug 15 and torque to 18.5 ft. lbs.

28. Install components in reverse of removal.

29. Torque the crankshaft pulley bolt 1 to 85 ft. lbs.

NOTE: If re-using the old accessory drive belt, observe direction of rotation markings.

ATTENTION: Installation steps #6 and #16 through

#24 are critical to proper installion!!

It has a timing chain. I don't know the answer to the latter part of the question, sorry. I've actually had the same issue finding true engine specs, not just the basics and the interior features!

Yes it does, both the 4.0, and 5.2 I would change at around 75,000-90,000 miles.

The timing chain should last for the life of the engine. 200k plus.

have her towed to a dealer. My husband tried to install the head and timing belt but there just isn't enough room to manouver. We ended up having it towed and repaired at the dealer. it might cost you an 1hour or less of labour

The underhood label on mine says 0 degrees for both manual and auto trans. I just set mine to 0, but it doesn't seem to be running right. I've heard there's a timing wire that needs to be unplugged before checking the timing. If anyone knows what that is, it would help us both out.

If your motor has the hei with the external coil, you remove the four pin connector on the dist. leave the other one connected. This shuts off the est and you should be able to time the motor.

usually coolant leaks come from bad gaskets... or a bad water pump.. i would say drain the system and run water through the radiator (do NOT drive with water in the radiator, your engine will surely overheat!) and see if you can spot where the coolant is coming from... if it is coming from the engine block then you might have bad gaskets.. if not then it's the water pump.

Power steering/Drive belt Adjustment To adjust P/S belt tension, loosen tension pulley bolts and turn tension pulley using hexagon wrench. Adjust belt tension to specification described in CHECK. Then tighten tension pulley bolts to specified torque. Tightening torque P/S belt tension pulley bolt (a): 25 Nm (2.5 kgf-m, 18.5 ft. lbs.)

the timing is usually set by adjusting the distributor and using a timing light on the number one cylinder and pointing the light at the harmonic balancer on the bottom of the engine crankshaft pulley,the timing mark on thr balancer should be marked on the correct degree for example 10 degrees before top dead center. as the distributor is turned the timing on the light will adjust to the balancer . to get the correct timing look under your hood for a sticker that has timing and sparkplug gap specs.

The asteroid belt is a vaguely elliptical band between the orbits of Mars and Jupiter. This 'belt' contains different sizes of space rock and dust that is trapped in orbit between the two planets. The rocks within the belt tend to travel in loose clusters.

While collisions occur, the actual spacing between individual large asteroids can be measured in tens of thousands of kilometers. And while there may be more than a million asteroids over 1 km in diameter, their combined mass is only about twice that of the largest asteroid, the dwarf planet Ceres.

There are various sources (such as heat, nutrients, etc.) and they are processed in many ways. In many cases the first organism in a chain lives off of the wastes of the high animals of the chain.Would need a specific chain to be able to answer more definitively.

yes because the later it is in the day the tierder you will be, eg: if you test someones reaction time in the morning it will be much faster than it is at night. so the later it is in the day the slower your reaction time will be. the earlier it is in the day the faster your reaction time is.

A reflex is an involuntary response to an external stimulus, usually to protect the body. A reflex is much faster than a reaction. A reaction is a voluntary response to an external stimulus, and can be trained to become faster through regular practice. An example of a reflex is when the tendon below the kneecap is gently tapped. This causes the leg to kick slightly forward. This reflex is involuntary. An example of a reaction is a hockey goalie catching a hockey puck. This reaction is voluntary.

It depends on the type of task you are doing. As you get older your muscle movement part of reaction time gets slower but your initial reaction time i.e. the brain acknowledging, the visual and deciding what to do is the same as younger individuals.

Reaction time shortens from infancy into the late 20s. Then reaction time slowly increases from 50s and 60s. The Reaction time lengthens faster as the person gets into their 70s.

Hope this helps :D

12pm is noon. 12am is midnight twlight is the time between sunset and sunrise.

Listed in your owner's manual.

YES, And depending on the type of engine it can total the engine if it breaks.

The Gates website ( they make timing belts etc. ) shows the timing belt should be

changed at 60,000 mile intervals on a 1993 Lexus ls400