Timing belt marks and replacement instructions

I checked it out on RockAuto and this is what they say

"Camshaft; Non Interference Engine"

So it could have bent valve. I would remove the both valve covers and rockers then do a leak down test to see if any are bent.

Here is how the timing belt job is done and the marks.

https://www.2carpros.com/diagrams/nissan/quest/2002

Please let us know if you need anything else to get the problem fixed.

I replaced a timing belt and water pump on a 2002 Nissan quest. The timing marks were aligned according to the notches on the timing belt cover and crankcase. when I start the engine it runs,sputters and shuts off. Did I align the timing marks for the exhaust cycle, and if so, how do I align the timing marks properly for the compression cycle.

Did T belt brake while driving? This motor is a non interference motor. Valves and pistons cannot be damaged because they have enough clearance in the event of T-belt failure. If not see diagram if lined up on intake cam then it is correct.

Do I need to drop the engine on a Nissan Quest to change the timing belt?

Disconnect negative battery cable. Remove the engine undercover. Drain coolant and remove the radiator. Remove engine cooling fan and water pump pulley. Remove accessory drive belts. Remove spark plugs.
Remove distributor protector. Remove A/C compressor drive belt idler bracket. Remove fresh air intake tube from rocker cover. Remove thermostat housing hose.
Rotate crankshaft to set No. 1 cylinder at TDC on compression stroke.
. Remove crankshaft pulley bolt and remove crankshaft pulley. Remove front upper and lower timing belt covers


Align punch mark on left camshaft sprocket with punch mark on timing belt upper rear cover. Align punch mark on crankshaft sprocket with notch on oil pump housing.
Install crankshaft pulley bolt so that crankshaft can be rotated.
Loosen timing belt tensioner nut.
Turn tensioner, and remove timing belt.

1999 Nissan Quest mileage: 60,000. I'm getting mixed answers on what mileage to change the timing belt. When do you think? And, if it breaks, is it going to be a large repair, or just replace the belt?

Your engine’s timing belt should be replaced at 60,000 miles. It is cheaper to replace the belt before it fails.

what if it is a 3.3 litre will it bend or not. thanks