Where is the insp plate cover for the timing belt on a 3.3v6 2000 xterra

EGR is for NOX

Too Rich a fuel mix is HI CO

Are the front or upstream oxygen sensors over
100,000 miles?
Air Filter new?
Always change oil before inspection & use full synthetic
Spark plugs over 2 or 3 years,won't pass insp
Clean MAF Sensor

Service reset


Important note: Proceed exactly as follows; otherwise the reset system will go into the locked position and special tools are required to unlock it (Tech 2 tester).

1. Turn the ignition OFF.
2. Press and hold the reset button [1] (see the above picture).
3. After 3 seconds the "Distance till service" appears on the display, "InSP 0".
4. Press and hold the brake pedal.
5. Note: Ensure the button [1] is still pressed.
6. Turn the ignition ON.
7. The display shows: "InSP----".
8. After turning the ignition ON, wait for the service message to change and keep the reset button pressed for at least 3 seconds.
9. Release the brake pedal and reset button at the same time.
10. Wait for 10 seconds, until the display shows: "InSP XX,000 km".
11. The system is reset.

It's a bit of a pain but here is what you set it to:

Aligning the marks on the flywheel with the marks on the flywheel cover

Driver side timing belt (No. 2) and No. 2 tensioner-1.8L engine

Passenger side timing belt (No. 1) and No. 1 tensioner

1. Disconnect the negative battery cable.
   
2. Loosen the water pump pulley mounting bolts.
   
3. Loosen the alternator mounting bolts and remove the alternator belt.
   
4. Remove the water pump pulley bolts and remove the water pump pulley.
   
5. Disconnect the electrical harness from the oil pressure switch.
   
6. Remove the dipstick tube.
   
7. Remove the crankshaft pulley.
   
8. Remove the timing belt cover plate, if equipped.
   
9. Remove the timing belt cover bolts on the left, right, and center covers.
   
10. Remove the timing belt covers.
    
11. Remove the rubber cover seal. Clean all mating surfaces.
    

To install:

1. Install a new timing belt cover seal.
   
2. Install the timing belt covers on the engine using the mounting bolts. Tighten the bolts to 48 inch lbs. (5 Nm).
   
3. Install the timing belt cover plate, if removed.
   
4. Install the crankshaft pulley, and tighten the bolt to 69-76 ft. lbs. (93-103 Nm)
   
5. Install the dipstick tube.
   
6. Connect the electrical harness to the oil pressure switch.
   
7. Install the water pump pulley and loosely install the mounting bolts.
   
8. Install the drive belt and adjust the tension as necessary. Tighten the alternator mounting bolts.
   
9. Tighten the water pump pulley mounting bolts.
   
10. Connect the negative battery cable.
    

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Timing belts should be changed every 60,000. Different car makes state different mileage but as a whole 60,000 miles and you should replace the timing belt.

The belt keeps the crankshaft and camshaft in time with one another. And is very important. If you dont change them when they need changing. It can cause extreme engine damage so yes it can effect the internal engine damage.

On a 3.3L engine V-6, Nissan recommends replacement every 105,000 miles, note that this is an interference engine, that piston to valve damage will happen in the event of a timing belt failure.

Xterra with 2.4L and 4.0L have timing chain only, no timing belt.

It has a timing belt, not a chain. Easy enough to check your owners manual. From memory, belt is to be replaced at about 100,000 miles or 160,000 km give or take.

I am assuming you have the 3.3 litter v-6?I just did my own so I can offer you a few words of personal advice. Make sure, before you remove the crank shaft pulley, that the engine is at TDC. There is a pointer on the lower timing cover that should line up with the mark that is furthest to the left on the crank pulley (looking at it from the front of the truck). If you are replacing the timing belt for maintenance, not failure, make several marks on the cam pullies to the rear of the timing cover with a paint pen before removing the old belt and make sure that everything stays aligned to those marks upon reassembly. If this method is not an option, use the timing dimples on the back of the upper timing cover only as reference points for the cam pulleis (this is where I ran in to trouble). What is most important is that there are exactly 40 teeth on the belt between the marks on the cam pullies and 43 teeth between the right cam pully mark (right cam as you look at the engine from the front of the truck) and the mark on the crank pully. I used a Goodyear Belt that actually had marks that indicated the 40 and 43 tooth increments. Make sure you have the belt on the right directon, arrows to the front of the truck. Again it is very important that the crank pully remain at TDC (top dead center) during the entire process. Good luck, hope you get it the first time and not the second like me!!

Yes the belt is a rubber belt which needs replaced approx every 60k The belt breaks, the engine stops.. hopefully no valve damage occured!

It's has a timing belt, also it's an interference engine, if belt goes bad it will bent valve's .

No way I can guide you through a belt replacement without re-writing a manual. If you've ever done a chain before, its the same stuff, just a belt instead of chain. Make sure tension is correct and that timing (index) marks on cam & crank pulleys are aligned properly. If you find any oil leaks in there, fix them before replacing belt. Get a manual... The job itself isn't that difficult, but is time consuming.