Where are the timing marks on a 2002 Dodge Stratus 3.0 engine?

SOURCE: replacing serpentine belt 2002 dodge stratus

Did this on my 2002 Stratus 2.4L. I agree with other poster, you do have to remove the passenger tire and wheel wall to do it, but the tensioner travels clockwise.
Note: I offer this solely as a description of how I accomplished the task on my vehicle. It should not be taken as me advising anyone else in any way on how or whether they manage to repair their own vehicles.

1) Engaged parking brake, loosened lugs on passenger front tire.
2) Jacked-up and placed jack-stand.
3) Removed piece of black under-carriage which surrounds the oil filter and attaches to front bumper. There are at least 10 plastic push-pins to remove and I managed to destroy half of them in the process.
4) Positoned belt over lower pulleys and tensioner (as best as possible) then used a bungee to hold the top end of belt up while I worked under the car.
5) Used a 3/8 ratchet and inserted into square hole attached to the tensioner, disengaged the tensioner (moves clockwise) then used a brace to keep the ratchet handle in that position.
6) From top, removed bungee and finished placing belt over alternator, checked the position of entire belt, reengaged the tensioner, and replaced wall and wheel.

SOURCE: location of thermostat on 2002 dodge stratus 2.7 eng.

The thermostat on this car is located on the passenger side lower Engine block. Follow the lower radiator hose and it will lead you right to it. The Wheel and splash guarding need to be removed as well as the Alternator to gain access to the housing bolts. It about a 3 hour job to replace thermostat.

SOURCE: isuzu trooper 2002 RLV engine. camshaft timing

Sorry for the severe delay.
I am personally going back to answer your unanswered question.
I do not know if you still need the answer, but I am going to answer it in case you still do.

Click on the following direct Link. It has the Timing Belt Diagrams and Photos with Marks for the Camshaft and Crankshaft that you will need. It also has numerous other helpful diagrams, instructions and photo's for use.

Again my apologies...
Let me know if this helped, or if you have additional information or questions. Feel Free to contact me at FixYa.com!

http://www.2carpros.com/car_repair_information/year/2002/make/isuzu/model/trooper/2002_isuzu_trooper_timing_belt_diagram_marks.htm

SOURCE: 2002 Dodge Stratus Rt 3.0L Need Firing Order

For the 2002 Dodge Stratus 3.0L SOHC V6:

Firing Order:
1-2-3-4-5-6

Cylinders:
......(back).......
|...1....3....5...|
|...2....4....6...|
......(front)

Distributor Connections:
..(back)
.....1
3........2
5........6
.....4
.(front)

Let me know if this helped, or if you have additional information or questions. Feel Free to contact me at FixYa.com!

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SOURCE: 2004 dodge stratus 2.7 dohc

they work together. be absolutely sure you have them right because if not you run the risk of doing some head damage