I put on a new timing belt.both cam gears marks are up,crank grear mark is in line,will not start.

The marking on the casing is factory rong, check your piston on TDC & adjust your mark for the teeth

line up the marks on crank shaft gear arrow to arrow, the front cam gear the mark goes to the middle on the rear cam gear the mark goes one notch below front gear mark they line up when the tension is put on belt.

Not sure but if doing belt yourself I will give you important tips. 1) before removeing T/Belt set engine to TDC nr 1 there should be marks on the crank and cam (s) gears that line up with a mark on the block / head. 2) prior to removeing tension to belt get liquid paper & mark cam gear(s) & crank gear to point on block / head. 3) mark T/Belt to cam(s), crank, balance shaft if fitted. 4) release tension & remove belt. 5) transcribe marks from old belt to new belt & make sure correct amount of teeth. 6) fit new belt so YOUR marks line up. 7) have tensioner suply presure to belt. 8) turn motor twice by hand to make sure pistons no hit valves 9) Make sure YOUR marks line up if YOUR marks line up it has to be right. 10) Very IMPORTANT if spring tensioner lossen locking bolt again to take up extra slack in belt. 11) tighten locking bolt. 12) put back together.

After you aligned the timing marks and tightened up the tensioner pulley, did you re-check your timing marks? Usually when you tighten the tensioner it will pull the cam and crank out of alignment. Line up the crankshaft first and then check to see where your cam gear is. If it is not lined up, loosen the tensioner and move the cam gear ahead to line it back up. If it doesn't line up perfectly then go AHEAD until the marks line up and put the belt back on. If the gear is on the mark and the belt teeth don't line up, move the gear ahead until you can get the belt on,but no more than a full tooth on the belt. Tighten your tensioner and check again. At most the cam sprocket should only be off about 1/2 tooth from the marks and it should be ahead not behind. Re-align your distributor to #1 and it should start. Hope this helps.

Only the 2.3 liter diesel is an interference engine. The 2.3 Liter gas is not an interference engine. I would guess the belt was not installed correctly. The belt broke so the cam was then out of alignment with the crankshaft. Unless you aligned it correctly it will not start. BTW, the belt must be replaced every 60,000 miles. I asume you have the timing cover off, put it back on and set the crankshaft at the 0 mark on the timing cover, remove the cover and don't touch the crank. near the bottom of the cam gear is a protruding piece of plastic with three raised areas, set the cam timing mark at the first pointer, closest to the passenger side . on the back part of the timing cover is a v shaped pointer set the distributor gear mark at the pointer, remove the distributor cap and verify that the rotor is pointing at #1. Loosen both bolts on the tensioner and using a pry bar carefully pry the tensioner away from the distributor gear, tighten the small bolt on the tensioner. install the new belt starting at the crank, then the distributor gear, then the cam, then over the tensioner pulley. loosen the small bolt and the tensioner will adjust automatically. tighten the tensioner bolts and turn the engine over by hand 2 or 3 times and make sure all marks line up ( the cam mark should now be at the center pointer with the crank at 0). I find it handy to paint a reference mark for the crank inside the timing cover.

On cam gear there's a punch mark, line that mark at 9 oclock there's a timing mark on cylinder head, crank gear, in back of crank gear is a plate with a (v) cut line gear at 11 oclock there's a timing mark on front case, gear to right of crank gear has a (v) cut on it, line it at about 11 oclock at timing mark on front case, adj tensioner and your done.Good Luck.

Simply buy a new belt from Nissan. Line up the marks on the belt with the marks on the cam gears and crank gear and it will start.

BEFORE U TAKE THE TIMING BELT OFF PUT THE CRANK SHAFT ON ITS MARK.IF THE CAM MARKS ARE NOT LINED UP THEN ROTATE THE CRANK 180.THEN U CAN MARK THE POSITION OF THE CAM & CRANK GEARS W/A CRAYON,WHITE OUT ECT.AS LONG AS THE GEARS DO NOT MOVE THEN U WILL BE OK.WITH THE OLD BELT ON U CAN SEE THE TIMING MARKS.

put the number one cylinder at top dead center and line up the timing marks on the cam gear and put the belt on

Mark are on the crank and cam timing gears. Cam gear mark at 12 o"clock crank gear mark lined up with TGC mark on block when installing timing belt.