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Sorry for double post on cam sprockets. The timing chain has three distinct colored links, The two links with same color are for camshaft sprockets, intake and exhaust. The one single link color is for crank shaft. Good luck. You can see the marks on sprockets.
If you can't find any information you may have to do it from scratch. Find tdc on crankshaft, find point where opposite cylinder to number 1 (cylinder 4 on inline 4 engine) is 'rocking' ( exhaust closing, inlet opening) at this point you are close, and should be able to find the correct mark. (probably need valve cover off to see cam and valves moving as you carefully turn camshaft) some engines have a balance shaft driven behind the oil pump. If so there will be marks to line up there too. Can be tricky, eg mitsubishi motor, just lining up oil pump mark may not be right, it's not a direct drive to balance shaft. A pin has to be able to insert into a bolt hole on the side of the block, so maybe have to turn oil pump gear up to 3 times to get right position. Sorry not familiar with your motor.
With Cam Caps loosened, FIRST loosen timing chain tensioner, press it in to loosen tension, Crank using ratchet to TDC (Top Dead Center on crank pully, (to keep from damage to pistons), align Exhaust Cam Timing Mark to mark on #1 Exhaust cam cover, then take up slack between Exhaust & Intake Cams (on top between the cams), Then align the Intake Cam to mark on #1 Cam Cap, "Now" loosen the 17mm bolt to tighten timing chain, rotate engine using rachet two times, reset TDC at the crank, and look at "Cam Timing Marks on both the Exhaust, and Intake Cams. If you did all this correctly the "Timing Marks" should be lined up so TDC,Exhaust, and Intake marks are all the same.
the cam shaft may be identifiable but I doubt it as the lobes will be all the same .It may take a trial fitting of the cam shaft to determine which is which. Place the no 1 piston on TDC and install the cam in the exhaust side of the head. position a the no 1 piston cam lobe in the just closing position. Check where the timing mark will be in this position ( the engine make and sized would have been an enormous help here as the key position or timing mark on the gear would have revealed what cam it was). Place the other cam in the position where the no1 cam lobe is just opening.. This is called valve overlap and from the positioning of the timing marks will show if the cams should be interchanged . The marks will either both face down, face each other or face upwards. If they face out wards away from each other then interchange the the cams and if that makes the marks face each other then it may be right. Another way ( probably simpler will be to put a cam in place and the cam lobes will be directly in line with the rockers over the valves or directly over the valves. Workshop manuals are a big help when doing this work.
set mark on crankshaft to TDC mark on timing cover. set mark on cam pulley to align with mark on head .if more than one mark on pulley rotate by hand till exhaust and inlet just rocking then align closest marks .
I am not sure how it can be out of time when the dots * to * line up exactly on both the front and rear cam. I just dont understand how one is supposed to get the service bolt in the rear cam since it is on the bottom of the exhaust gear.
Gear on crank has a dot stamped on it, gear for cam also has a dot stamped on it. when all is put together, the two dots must align with each other at the closest point of rotation.
If possible, position the engine so the No. 1 piston is at TDC.
Disconnect the negative battery cable.
Remove the timing belt covers.
Remove the timing (outer) belt tensioner and remove the outer timing belt.
Remove the outer crankshaft sprocket and flange.
Remove the silent shaft (inner) belt tensioner and remove the belt.
Fig. 1: Silent shaft belt timing marks — 1.8L engine
Fig. 2: Checking the silent shafts for proper positioning
Fig. 3: Timing belt timing mark alignment — 1.8L engine
To install:
Align the timing marks of the silent shaft sprockets and the crankshaft sprocket with the timing marks on the front case. Wrap the timing belt around the sprockets so there is no slack in the upper span of the belt and the timing marks are still aligned.
Install the tensioner pulley and move the pulley by hand so the long side of the belt deflects about 1⁄4 in.
Hold the pulley tightly so the pulley cannot rotate when the bolt is tigthened. Tighten the bolt to 15 ft. lbs. (20 Nm) and recheck the deflection amount.
Install the timing belt tensioner fully toward the water pump and tighten the bolts. Place the upper end of the spring against the water pump body.
Align the timing marks of the camshaft, crankshaft and oil pump sprockets with their corresponding marks on the front case or rear cover.
NOTE: There is a possibility to align all timing marks and have the oil pump sprocket and silent shaft out of time, causing an engine vibration during operation. If the following step is not followed exactly, there is a 50 percent chance that the silent shaft alignment will be 180 degrees off.
Before installing the timing belt, ensure that the left side (rear) silent shaft (oil pump sprocket) is in the correct position as follows:
Remove the plug from the rear side of the block and insert a tool with shaft diameter of 0.31 in. (8mm) into the hole.
With the timing marks still aligned, the shaft of the tool must be able to go in at least 2 1/2 in. If the tool can only go in about 1 in., the shaft is not in the correct orientation and will cause a vibration during engine operation. Remove the tool from the hole and turn the oil pump sprocket 1 complete revolution. Realign the timing marks and insert the tool. The shaft of the tool must go in at least 2 1/3 in.
Recheck and realign the timing mark.
Leave the tool in place to hold the silent shaft while continuing.
Install the belt to the crankshaft sprocket, oil pump sprocket, then camshaft sprocket, in that order. While doing so, make sure there is no slack between the sprocket except where the tensioner is installed.
Recheck the timing marks' alignment. If all are aligned, loosen the tensioner mounting bolt and allow the tensioner to apply tension to the belt.
Remove the tool that is holding the silent shaft and rotate the crankshaft a distance equal to 2 teeth on the camshaft sprocket. This will allow the tensioner to automatically apply the proper tension on the belt. Do not manually overtigthen the belt or it will howl.
Tigthen the lower mounting bolt first, then the upper spacer bolt.
To verify correct belt tension, check that the deflection at the longest span of the belt is about 1⁄2 in.
Install the timing belt covers and all related items.
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.
there is a special tool to hold gears in correct place on some of these models, but you can hold one cam at a time with a spanner then feed belt on exhaust cam then inlet cam gear
get someone to hold gears in place while you feed belt on.
the inlet cam is more prone to turn off mark more than exhaust.
if you have tensioner that needs retaining pin in when installing
you fit belt while aligning timming marks
fit tensioner as last spot to feed belt on with retaining pin in adjuster
get correct tension on belt by turning water pump so that you can flex (turn) belt 90 degrees only just while using finger and thumb
tighten water pump check flex
check all timing marks are correct
remove retaining pin from auto tensioner
turn motor over a couple of turns by hand observing tensioner arrow should hover around V mark and that all timing marks align up again(after one complete turn)
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