We removed the cam and did not pay attention to timing marks. the engine was rotated without cam in it. How do we set the timing?

If you removed the tensioner and didn't lock the cams and crank down then you have to re-time the engine. It sounds like you let the exhaust and intake cams move.

Remove the spark plugs, put a ratchet on the crank pulley, slowly rotate engine until the cams line up. Once the cams are lined up remove, the timing belt and bring the crank around to the timing mark. put belt back on and let the tensioner go. put plugs back in...see if it'll start.

Your going to have to index your cams the cam gears have a notch/paint mark on both the gear and the housing behind them I'm not positive on that motor but on the majority of engines the crankshaft must be placed at top dead center of cyl 1 then match the each cam gear to its corresponding markings and the markings on the new belt pay attention when you reapply the belt tensioner as it tends to rotate the cams slightly when tension is applied if this happens you could cause a piston/pistons to contact the valves destroying the piston, bending the valves, or damaging the cam or crankshaft themselves. Good luck I suggest investing in a high quality repair manual before continuing

You totally disassembled the engine ?
If so, there are marks on the crank and cam that line up. The crank dot tooth goes between two cam teeth at the cam dot.
If you are talking about valve lash.
.003-.005 will work.

Hello there,

There is some risk to doing it yourself, but only if you do it incorrectly. The cam synchronizer is integral to engine timing, and if the new assembly is not installed with the exact same orientation as the original some serious damage could occur. Luckily, it's not that easy to mess up if you pay attention. The teeth on the bottom of the synchronizer are big enough that the vane rotates approx 10 degrees for each tooth. After removing the sensor from the top of the assembly and before touching the clamping nut that secures the synchro; if you mark the relative position of the synchronizer body on the block, and mark the position of the vane on the synchro body you can install the new synchro in the exact same position. If you make accurate marks and pay attention, it will be obvious if you are off. I replaced mine with this method and have driven approx 150 miles since without a CEL to be seen, nor a squeak to be heard.

However, in replacing the sensor, locate the cam synchronizer there should be a small coolant hose above the harness disconnect the hose pull the spark plug wires from the coil move them out of your way lift up on the wiring harness shroud there are two 5.5 mm bolts holding the sensor to the synchronizer remove the bolts remove the sensor mark the location of the synchronizer on the block and there is a *** inside the synchronizer mark its location to the synchronizer body now remove the 10mm bolt holding the synchronizer to the engine pullup twist counter clockwise it should come right out then get your new synchronizer make the same alignment marks on the new one as you marked on the old one and slide your synchronizer in the hole make sure all your marks line up then do the removal steps in reverse.

In any case you encounter much difficulty in doing these yourself, then contact an auto-technician as soon as possible.

Hope these help.

Welcome to FIxYa.com

YOU WANT TO KNOW HOW TO REPLACE TIMING BELT?

Due to the amount of images FixYa can not handle them into one thread. Please e-mail me for the diagrams (PDF Format) at [email protected].

Timing Belt Service 2002 Kia Sedona 3.5 liter

Removal

1. Remove the engine cover

2. Remove the drive bell.

3. Remove the idler pulley, crankshaft pulley, power steering pulley and tensioner

pulley.

4. Remove the upper and lower timing belt cover.

5. Support the engine with garage jack or special tool, and then remove the engine

mounting insulator.

Caution: Take care not to deform the engine oil pan.

Image 1

6. Remove the auto tensioner.

Notice: Rotate the crankshaft clockwise and align the timing mark to get the No.1

cylinder's piston be in TðC position (compression stroke). At this time, the timing

marks of the camshaft sprocket and cylinder head cover should coincide with each

other.

Image 2

'. Remove the timing bell.

Notice: When re-using timing bell, make sure of marking the rotating direction on

the belt so as to install correctly.

Image 3

Installation

Method of installing timing bell and auto tensioner

Image 4

1. Install the idler pulley to the engine support lower bracket.

Image 5

2. Install the tensioner arm, shaft and plain washer to the cylinder block.

Tightening torque: 35 -55 Nm (350-550 kg-cm, 25.82 -40.57 ft. lbs.)

Image 6

3. Install the crankshaft sprocket.

Notice: Confirm if timing marks coincide with.

Image 7

Caution: Align the spacer with a pin, and assemble it exerting even force not to

deform the crankshaft sensing blade.

Image 8

4. Install the camshaft sprocket. Align it like initial state as shown.

Caution: When installing camshaft sprocket, tighten the bolt holding hexagonal

part of camshaft to prevent it from tuning.

5. Install the auto tensioner to the oil pump case.

Image 9

Caution: At this time the auto tensioner's set pin should be assembled completely.

Image 10

6. Align the timing marks of each sprocket and install the timing bell, maintaining the

proper belt tension between each shaft in this order. Crankshaft sprocket -> Idler

pulley -> Left bank exhaust camshaft sprocket -> Left bank intake camshaft sprocket

-> Water pump pulley -> Right bank intake camshaft sprocket -> Right bank exhaust

camshaft sprocket -> Tensioner pulley.

Caution:

1 As a result of this, position of No.1 cylinder comes to compression TDC.

2 As each camshaft sprocket tends to rotate by itself, pay attention not to injure

fingers or other bodily part. Especially be careful with the right bank.

3 In case the right bank camshaft sprocket rotates excessively, be cautious not to

rotate more than the initial stable position. Always align timing mark of rotating

sprocket by turning it reversely. In this case, pay attention not to rotate It

reversely from the initial position. (if. with one sprocket fixed at No.1

compression TDC position, the other sprocket is rotated one revolution

clockwise or counterclockwise, then the intake and exhaust valve might intetfere

each other)

7. After installing the timing bell, exert the reverse directed force to the right bank

exhaust camshaft sprocket to give tension on the belt. Holding this state, recheck it

each timing mark is correctly positioned.

S. With tensioner pulley slightly pushing the belt down, tighten the center bolt

slightly.

9. Pull out the auto tensioner set pin

How to adjust timing belt tension

1. Tension setting (While auto tensioner is not operating: And set pin being kept

installed.).

1) After rotating crankshaft 1/4 revolution reversely, rotate it clockwise to position

No.1 cylinder at TDC. Then, loosen the center bolt and give the belt 50 kg-cm of

tension with tensioner pulley socket (Two pins are attached) and torque wrench.

While maintaining this state, tighten the center bolt to the standard torque.

Center bolt standard torque 43 - 55 Nm (430 - 550 kg-cm, 31.72 - 40.57 ft. lbs.)

Image

2) Pull out the auto tensioner fixing pin.

2. How to check tension (While auto tensioner is operating: and fixing pin being

un-installed.)

1) After rotating crankshaft 2 revolutions clockwise to position No.1 cylinder at

TDC wait for about 5 minutes, and measure the amount of protruding of the auto

tensioner rod.

Caution: This is "leak down" time for the auto tensioner rod to protrude 1mm

when tension caused by rotation of the crankshaft has changed.

Image

2) Check if the amount of rod protruding is in the range of 3.8 -4.5 mm.

3. Recheck if each sprocket is within the specified range.

Notice: ¡fit is not within the specified range, repeat from procedure 6 as service

procedure of timing bell and auto tensioner installation method. Refer to Timing

Belt; Service and Repair.

Thank you for using FixYa.com

Regards, Lee Davidian

The IGNITION timing on your Ranger is computer-controlled and is not adjustable.


Should the camshaft drive belt/timing belt jump timing by a tooth or two, the engine could still run; but very poorly. To visually check for correct timing of the crankshaft, auxiliary shaft, and the camshaft follow this procedure:
There is an access plug provided in the cam drive belt cover so that the camshaft timing cam be checked without moving the drive belt cover.

1. Remove the access plug.
2. Turn the crankshaft until the timing marks on the crankshaft indicate TDC.
3. Make sure that the timing mark on the camshaft drive sprocket is aligned with the pointer on the inner belt cover.

Never turn the crankshaft of any of the overhead cam engines in the opposite direction of normal rotation. Backward rotation of the crankshaft may cause the timing belt to slip and alter the timing.
REMOVAL & INSTALLATION

See Figures 1, 2 and 3

Fig. Fig. 1: Timing belt cover on the 2.3L and 2.5L engine

Fig. Fig. 2: Timing belt assembly on the 2.3L and 2.5L engine

Fig. Fig. 3: Releasing the timing belt tensioner using a special tool

1. Rotate the engine so that No. 1 cylinder is at TDC on the compression stroke. Check that the timing marks are aligned on the camshaft and crankshaft pulleys. An access plug is provided in the cam belt cover so that the camshaft timing can be checked without removal of the cover or any other parts. Set the crankshaft to TDC by aligning the timing mark on the crank pulley with the TDC mark on the belt cover. Look through the access hole in the belt cover to make sure that the timing mark on the cam drive sprocket is lined up with the pointer on the inner belt cover.

Always turn the engine in the normal direction of rotation. Backward rotation may cause the timing belt to jump time, due to the arrangement of the belt tensioner.

1. Drain cooling system. Remove the upper radiator hose as necessary. Remove the fan blade and water pump pulley bolts.

The ignition timing is CDI ignition, pre-set at the factory. You can't change it. The valve timing is the only timing you can do and that is done by lining up the static cam timing mark and the timing mark on the flywheel.

If you simply installed the cam chain on the gear without paying attention to the position of the crank and the position of the cam then the valves are likely not opening and closing at the correct time. Too far off and the piston can hit the valves and bend them and possibly crack the valve guides.
Check a service manual. Cam chain timing procedures will be shown in the manual.

Please rate this answer. Thanks Tasha!

with crank pulley white mark on 0 remove both cam pulley covers and verify yellow painted notches are exactly on the T mark cast in the fwd cam bearing housings..IF u find that it ISNT 'in time' then remove tensioner located near crank pulley and very carefully manipulate the L and R cam sprokets to allow belt to removed from cam sprockets only... DoNOT rotate engine without T belt installed .Do NOT turn engine backwards.. ever.. be advised that should the cam timing be off by more than 3 teeth either way serious engine damage will result ..this series of engines utilizes variable intake camshaft adjustment .. This job is not for the american small block specialist of yesteryear.. even an experienced asian tech is gonna have a difficult time with this lexus .. its not quite the same engine the Tundra uses...Lexus only mods befuddle reg toyota techs

There are alignment marks on the timing set,and before you remove the old timing set,you must get cylinder number 1 in the firing order to Top Dead Center....then you can remove the old,and reinstall the new,timing set,but pay careful attention to the marks on each gear,in relationship to each other and where they line up.The new timing gear and chain set should have directions on where they are to line up,if not,you need to buy a Chilton manual for your specific car,as i don't have the specific information for your 3.1 engine.It sounds like your timing is WAY off,and when rotating the crank,a piston is hitting a valve...that means it's WAY out of phase...do not start the engine until resolved.The camshaft actuates the valves in relation to the crank and pistons' position,and when the valves open or close is VERY important for the engine to run properly,this is what i'm talking about (phased in) correctly.

the crank has the only mark you have a procedure for the cam gear you should see if the local dealer will print this out for you