Timing are the left intake and left exhaust on the same side

I will post a picture so you can ID the valve. It is on the top of the engine bolted to the intake.

Which one ?
Camshaft Position Sensor Replacement - Bank 2 (Left Side) Exhaust Camshaft Position Sensor Replacement - Bank 2 (Left Side) Intake Camshaft Position Sensor Replacement - Bank 1 (Right Side) Exhaust Camshaft Position Sensor Replacement - Bank 1 (Right Side) Intake

Hi there, Yeah this is a bit tricky. First things first. what engine do you have in ? Double cams have unique marks. You will see the left cam sprocket should be aligned with "IN" on the intake side and "Exhaust" on the exhaust side. On the same sprocket is a indent line on the edge of the sprocket on the exhaust side. The sprocket on the right side "Exhaust side", should be aligned exactly as the left one. So you have both sprockets aligned with the "intake" facing the intake side and the exhaust facing the exhaust side. You will now notice that there is a line up indent on the outer ring of both sprockets. These should be exactly facing towards each other. Now caution is advised here, even before you start with this, you must move your crankshaft sprocket to the left just so that all pistons are half way up. This will make sure when you do turn the cam shafts that the valves don't interfere with any piston. Now adjust the cam shafts as described above and use inventful mind to lock both cam sprockets in line together. Make dead sure with use of a ruler, that the lines on both sprockets are definitely lined up. Now move your crankshaft sprocket to the right and line up the two markers on the outer side with the line directly above further away from the TDC marks, "Located to the left". So to the right of those TDC marks is a Forged out line. Line the two dots on the c-shaft up with this line. When done with this you may fit on the belt and make sure that the belt is fitted tightly on the exhaust side meaning pulled to near tension, then follow through to the left cam and then over the water pump. Fit on the tension-er. Here you get two different types of tension-ers. Automatic one is fitted under the intake side cam sprocket, it gets hold down with a bolt. the wire fitted with the tension-er loops over a bolt already fitted on the motor. Using a allen key turn the tension er so that the align plate with v-shaped indent is facing directly to the bottom loop of the wire. Then tighten the bolt hold down to lock the tension er in place. Lastly the ideal method before you fire up the engine is to remove the negative battery terminal and after you have fitted the external belt sprockets, on the crankshaft is to turn the engine clock wise and make sure that no valve is interfering with a piston. Turn until you can see the timing marks you just setup aligns back to normal. On the outer belt sprocket fitted on the c-shaft, there is a mark as well, this should also line up with the line further away to the right from the other marks to the left located on the belt cover. When you have spun the c-shaft clockwise, about eight times and all the marks align back to normal without any valve interfering with any piston, you may finish of the rest and fire up. Here your good to go. Good luck

Check for a MAJOR vacume leak such as a brake booster hose left off or the idle air control motor left unplugged or a computer ground left off. also is it possible that there were a left and right side gasket for the intake that may be switched? Check this out with your parts store and look at another set of the same brand to be sure. Also if equipped with an EGR valve make sure it is not damaged holding the valve open allowing exhaust to enter the intake and burning the fuel before going to the cylinders. IF equipped with a distributor , check for 180" out of time.
KAB

The best thing to do here is to access the factory repair manuals to see how to set the cams up. To do this go here. There is a small charge for the service

Timing Belt Cover, Belt & Sprockets Removal & Installation 2.5L Engine To Remove:

1. Remove the drive belts.
2. Remove the A/C compressor drive belt tensioner. Timing belt & cover DOHC exploded view
   
   
3. Remove the crankshaft pulley.
4. Remove the mounting bolts and left timing belt cover.
5. Remove the mounting bolts and right timing belt cover.
6. Remove the mounting bolts and front timing belt cover.
7. Vehicles W/ M/T: Remove the timing belt guide.
8. Ensure that the timing belt rotation arrows are still visible. If the marks are worn off, place new rotation marks on the belt. Timing belt alignment marks DOHC
   
   
9. Turn the crankshaft using a breaker bar and special adapter socket on the crankshaft. Align the timing mark on the crankshaft sprocket (1), left intake sprocket (2), left exhaust sprocket (3), right intake sprocket (4) and right exhaust sprocket (5) with the notches in cylinder block and timing belt cover.
10. Paint alignment marks on the timing belt at the crankshaft and camshaft sprockets timing marks. CAUTION
    Do not turn the camshaft sprockets with the timing belt removed. The valves heads will contact each other causing the valve stems to bend.
    
11. Remove the lower right idler pulley.
12. Remove the timing belt.
13. Remove the upper right idler pulley.
14. Remove the lower left (toothed) idler pulley.
15. Remove the belt tensioner.
16. Hold the sprocket and remove the left intake and exhaust camshafts.
17. Hold the sprocket and remove the right intake and exhaust camshafts.
18. Remove the crankshaft sprocket.

To Install:

1. Install the crankshaft sprocket.
2. Hold the sprocket and install the right intake and exhaust camshafts with the mounting bolts. Tighten 58 ft-lb (78 Nm).
3. Hold the sprocket and install the left intake and exhaust camshafts with the mounting bolts. Tighten 58 ft-lb (78 Nm).
4. Reset the automatic belt tensioner as follows:
   • Remove the mounting bolt and belt tensioner. NOTE: Do not exceed more than 2,205 lb. (9,807 N).
     
   • Place the belt tensioner on a press. Press the adjuster rod down gradually (using more than 3 minutes) 66- lb (165 N) or more until the adjuster rod is aligned with the stop pin hole in the cylinder.
   • Insert a 0.08 in (2 mm) diameter pin or hex wrench into the pin hole to lock the adjuster rod.
   • Install the automatic belt tension adjuster with the mounting bolt. Tighten 18 ft-lb (25 Nm).
5. Install the lower left (toothed) idler pulley. Tighten 29 ft-lb (39 Nm).
6. Install the upper right idler pulley with the mounting bolt. Tighten 29 ft-lb (39 Nm). Crankshaft sprocket and oil pump cover alignment marks 2.5L DOHC
   
   
7. Align the timing mark on the crankshaft sprocket with the mark on the oil pump cover. Timing belt alignment marks DOHC
   
   
8. Align the single timing mark on the right exhaust camshaft sprocket with the notch on the timing belt cover.
9. When the single timing mark on the right exhaust camshaft sprocket is aligned with the notch on the timing belt cover, ensure that the double lines on the intake camshaft and exhaust camshaft sprockets are aligned.
10. Align the single timing mark on the left exhaust camshaft sprocket with the notch on the timing belt cover by turning the sprocket counter clockwise (viewed from front of engine).
11. Ensure that the double lines on the intake camshaft and exhaust camshaft sprockets are aligned when the single timing mark on the left exhaust camshaft sprocket is aligned with the notch on the timing belt cover. CAUTION
    • The camshafts can be rotated independently causing the valves heads to contact each other resulting in bent valve stems.
    • When the timing belt is removed the camshafts will turn to the lowest cam lobe position by the force of the valve springs. Before installing the timing belt the 4 camshafts are in the lowest lift position (valves closed).
    • When the camshafts are rotated to install the timing belts, # 2 intake and # 4 exhaust cam lobes of the left camshafts are held to push their corresponding valves down. In this position, these valves are held in the open position. Right camshafts are held so their cam lobes do not push the valves down.
    • The left camshafts must be rotated from the lowest lobe position to the position where the timing belt can be installed at the smallest possible angle in order to prevent intake and exhaust valve contact. Camshaft sprockets rotation
      
      
    • Do not turn the camshafts in the direction shown in the illustration because the valves will open at the same time and contact each other.
    CAUTION
    If the timing belt alignment is off the mark buy more than 3 teeth, the valves and pistons may have contact.
    Timing belt alignment marks DOHC
    
    
12. Align the timing marks on the belt with the marks on the sprockets in the numerical order shown in the illustration.
13. Install the lower right idler pulley with the mounting bolt. Tighten 29 ft-lb (39 Nm).
14. Ensure that the timing mark alignment is correct and remove the tensioner stop pin.
15. Vehicles W/ M/T: Install the timing belt guide and temporarily tighten the mounting bolts.
16. Vehicles W/ M/T: Measure the clearance between the guide and timing belt. The clearance should measure 0.039 ± 0.020 in (1.0 ± 0.5 mm).
17. Vehicles W/ M/T: Tighten the guide bolts 7.2 ft-lb (9.8 Nm).
18. Install and secure the front timing belt cover with the mounting bolts.
19. Install and secure the right timing belt cover with the mounting bolts.
20. Install and secure the left timing belt cover with the mounting bolts.
21. Install the crankshaft pulley.
22. Install the A/C compressor drive belt tensioner.
23. Install the drive belts.

The intake cam is marked by a notch (left hand side of motor) and exhaust is marked with an arrow (right hand side of motor) both pointed 12 o'clock position to notch in cover

To align both sets of timing marks, turn engine crankshaft to the right with belt on cam and crank. Once you have done this the crankshaft alignment mark (on front of crankshaft gear) will line up with mark to the rear of gear on engine block.The two cam gear timing marks should be alines across from one another. The right cam gear is the intake side and the left side is the exhaust side. After removing the belt turn the exhaust cam down 1/2 notch. Timing mark on exhaust 1/2 notch down from the intake side. Install new belt and recheck everything to make sure it's all correct. Hope this will help you.

this is an easy one to time. the timing mark for the crank is 0 degrees-do not attempt to tum crank if cam timing is out. there is no distributor on this engine-it is advanced with your intake camshaft. The intake camshaft is the only tricky part to time. Be very careful because at 2500 rpm this cam actually moves forward via cam advance solenoid. It will hit your crank if not timed properly! so with your crank at o degrees-camshafts out of head if you need to turn engine to line up crank-on the exhaust cam(your left)behind the gear(on flange) there will be a hole big enough to put a small punch in that will line up with the top of the deck surface on the outer side(to the left). Now on your intake cam(your right) it will be just the opposite. the hole on the back side of the gear flange will line up on the right with the to p the deck surface. once in line hold intake cam and turn the gear(advancer) all the way to the right)-very important. You will have to start with you intake(put chain on) then line up your exhaust and install timing chain tensioner. always turn engine 360 degrees and recheck before you proceed. At least your at top dead center and you can visually see the lobes on both cams mostly straight up. hope I have been helpful.

That is a dual overhead cam engine. On the oil pump housing there is an arrow cast into the housing. Line the arrow on the crank pulley up with the arrow on the oil pump housing, that will set your crankshaft in time. Next you'll need to set your camshafts. This is the procedure for doing that......the exhaust cam gear (nearest the firewall) has markings on it that say "2.4L" on one side and "up^" on the other side. On the left side of the gear is a notch on the tooth. This notch MUST be set at 3:30 and the intake cam at EXACTLY 9:00. Once you've installed the timing belt and you rotate the tensioner to "tighten", the offsetting of the exhaust cam will match up with the intake cam. And presto!!! your timing is now set. Make sure you turn the crank sprocket TWO complete revolutions and verify your timing marks.

Chris