Timing marks for balance shaft to idler gear g6 engine

The timing marks on the balance shaft TDC (Top Dead Center) are used to properly align the balance shaft with the crankshaft. These marks are usually located on the crankshaft and balance shaft sprockets or pulleys, and they must be lined up before the engine is assembled or before the timing belt is installed. It is important to consult the vehicle's service manual or repair manual to locate the timing marks and to ensure that the proper procedure is followed for aligning the balance shaft TDC. Additionally, it's recommended to check the engine compression, cam timing, and check for any vacuum leaks.

The crankshaft doesn't. But the gear that goes on it does. It is a small triangle or a dot.

what car, XJ ended in 2001
or the KJ ?
Model years 2002-07), also known as the Jeep Liberty in North America
or grand Cherokee.?

what are you doing, we can';t guess that here?
CAM timing?
spark timing,?
the Balance shaft?
what country is this an Export jeep.

eg: , i removed my engine heads and......
eg: i removed my coil pack and did not mark the wires.

the 3.7l has no spark timing, its FIXED. by 3 ways.
so....?? what job>?

ill answer now for 3.7L 2005
our 3.7 (usa our)
COPS , that is , 6 coils over plugs. hard wired, so firing order is ECU controlled, 100%
that leaves the pulley marks, (the book shows no adjustment possible)
quote
Ignition timing is controlled by the Powertrain Control Module (PCM). No adjustment is possible.
Unquote

so my guess, wild you must be fiddling cams?
are you?
the Timing CHAIN? if yes, say so
or better why not log in to alldata.com
and read that, then ask questions not clear in the FSM or there.
my guess on cam
is step 11a you get stuck

The idler sprocket must be timed to the counterbalance shaft drive gear before the idler sprocket is fully seated.

double posted but this time the CAM pops up.
why not read the FSM first. ? linked below.
or alldata.com . log in and read.

here ill do a paste from JUST install PART chapter.
you are doing ALL THAT book free, REALLY?
https://www.techauthority.com/en-US/Pages/Home.aspx

1. Using a vise, lightly compress the secondary chain tensioner piston until the piston step is flush with the tensioner body. Using a pin or suitable tool, release ratchet pawl by pulling pawl back against spring force through access hole on side of tensioner.
2. While continuing to hold pawl back, Push ratchet device to approximately 2 mm from the tensioner body. Install Special Tool 8514 lock pin into hole on front of tensioner. Slowly open vise to transfer piston spring force to lock pin.
3. Position primary chain tensioner over oil pump and insert bolts into lower two holes on tensioner bracket. Tighten bolts to 250 inch lbs. (28 Nm).
4. Install right side chain tensioner arm. Install Torx®bolt. Tighten Torx®bolt to 250 inch lbs. (28 Nm). CAUTION The silver bolts retain the guides to the cylinder heads and the black bolts retain the guides to the engine block.
5. Install the left side chain guide. Tighten the bolts to 250 inch lbs. (28 Nm).
6. Install left side chain tensioner arm, and Torx®bolt. Tighten Torx®bolt to 250 inch lbs. (28 Nm).
7. Install the right side chain guide. Tighten the bolts to 250 inch lbs. (28 Nm).
8. Install both secondary chains onto the idler sprocket. Align two plated links on the secondary chains to be visible through the two lower openings on the idler sprocket (4 o'clock and 8 o'clock). Once the secondary timing chains are installed, position special tool 8429 to hold chains in place for installation.
9. Align primary chain double plated links with the timing mark at 12 o'clock on the idler sprocket.
10. Align the primary chain single plated link with the timing mark at 6 o'clock on the crankshaft sprocket.
11. Lubricate idler shaft and bushings with clean engine oil. NOTE The idler sprocket must be timed to the counterbalance shaft drive gear before the idler sprocket is fully seated.
12. Install all chains, crankshaft sprocket, and idler sprocket as an assembly . After guiding both secondary chains through the block and cylinder head openings, affix chains with a elastic strap or equivalent. This will maintain tension on chains to aid in installation. Align the timing mark on the idler sprocket gear to the timing mark on the counterbalance shaft drive gear, then seat idler sprocket fully . Before installing idler sprocket bolt, lubricate washer with oil, and tighten idler sprocket assembly retaining bolt to 25 ft. lbs. (34 Nm). NOTE It will be necessary to slightly rotate camshafts for sprocket installation.
13. Align left camshaft sprocket "L" dot to plated link on chain.
14. Align right camshaft sprocket "R" dot to plated link on chain. CAUTION Remove excess oil from the camshaft sprocket bolt. Failure to do so can result in over torque of bolt resulting in bolt failure.
15. Remove Special Tool 8429, then attach both sprockets to camshafts. Remove excess oil from bolts, then Install sprocket bolts, but do not tighten at this time.
16. Verify that all plated links are aligned with the marks on all sprockets and the "V6" marks on camshaft sprockets are at the 12 o'clock position. CAUTION Ensure the plate between the left secondary chain tensioner and block is correctly installed.
17. Install both secondary chain tensioners. Tighten bolts to 250 inch lbs. (28 Nm). NOTE Left and right secondary chain tensioners are not common.
18. Remove all locking pins from tensioners. CAUTION After pulling locking pins out of each tensioner, DO NOT manually extend the tensioner(s) ratchet. Doing so will over tension the chains, resulting in noise and/or high timing chain loads.
19. Using Special Tool 6958, Spanner with Adaptor Pins 8346, tighten left and right . camshaft sprocket bolts to 90 ft. lbs. (122 Nm).
20. Rotate engine two full revolutions. Verify timing marks are at the follow locations: ² primary chain idler sprocket dot is at 12 o'clock ² primary chain crankshaft sprocket dot is at 6 o'clock ² secondary chain camshaft sprockets "V6" marks are at 12 o'clock ² counter balancer shaft drive gear dot is aligned to the idler sprocket gear dot.
21. Lubricate all three chains with engine oil.
22. After installing all chains, it is recommended that the idler gear end play be checked. The end play must be within mm 0.004-0.010 inches (0.10-0.25). If not within specification, the idler gear must be replaced.
23. Install timing chain cover and crankshaft damper.
24. Install cylinder head covers. NOTE Before installing threaded plug in right cylinder head, the plug must be coated with sealant to prevent leaks.
25. Coat the large threaded access plug with Mopar® Thread Sealant with Teflon, then install into the right cylinder head and tighten to 60 ft. lbs. (81 Nm).
26. Install the oil fill housing.
27. Install access plug in left cylinder head.
28. Install power steering pump.
29. Fill cooling system.
30. Connect negative cable to battery.

try it and see .. get a printout of the timing marks from the parts store..

diagrams I have show a twin cam set up with 2 balancing shafts. The marks on the cam shaft point to (left cam shaft 11 oclock the mark on the right point to the 1 oclock position. The chain will have 3 black links-- the top black links will be at the timing marks on the shafts with the 3rd black link directly at 6 oclock facing a mark on the gear. The balancer marks both point to the 1 oclock position with black links on each and the 3rd black link will be facing a mark to the 7 oclock position on the crankahaft gear. Everything is done with the piston at TDC no 1 cylinder so get it there before you put the cam shafts in position or you will bend valves. Crank shaft gear is not keyed to the crank shaft. there are dots on the right hand balancer shaft gears and these dots will be as the 2 dots on adjacent teeth either side of a dot on the meshing gear. I suppose that is all as clear as mud but if you got this far then you will see the marks and marked links on the chains

see diagrams from autozone.com. Cam sprocket has an "UP" label, but also 2 scribes on the sides to align to upper head surface. The critical part of the job is keeping tension on the side of the belt that is opposite from the tensioner as the tensioner is released onto the belt. The timing marks must be aligned when the job is done.


To install:

1. Install the camshaft timing sprocket so that the UP mark is up and the TDC marks are parallel to the cylinder head gasket surface. Install the key and tighten the bolt to 27 ft. lbs. (37 Nm).
2. Install the crankshaft sprocket so that the TDC mark aligns with the pointer on the oil pump. Install the spacers with their concave surfaces facing in. Install the key. If equipped, install the TDC sensor assembly back into position before installing the timing belt.
3. Install and tension the timing belt. Use a 6 x 1.0 mm x 25 mm bolt threaded through the cam belt tensioner plate to temporarily hold the tensioner.
4. Temporarily install the crankshaft pulley and rotate the crankshaft counterclockwise 5-6 turns to be sure the belt is properly seated.
5. Set the No. 1 piston at TDC for its compression stroke.

WARNING If any binding is felt when adjusting the timing belt tension by turning the crankshaft, STOP turning the engine, because the pistons may be hitting the valves.

1. Rotate the crankshaft counterclockwise so that the camshaft pulley moves only 3 teeth beyond its TDC mark.
2. Loosen, then retighten the temporary cam belt tensioner bolt.
3. If the rear balance shaft sprocket/gear case assembly was removed, perform the following:
   1. If the rear balance shaft was moved, rotate the balance shaft until the 6 x 1.0mm x 100 mm bolt can be installed into the maintenance hole to the scribed line.
   2. Align the notch of the balance shaft sprocket edge with the pointer on the gear case. Install the rear balance shaft sprocket/gear case assembly using a new O-ring coated with fresh engine oil. The balance shaft sprocket should be installed in the TDC position. The pointer on the gear should align with the pointer on the oil pump housing plate.
   3. Tighten the mounting bolts to 18 ft. lbs. (25 Nm).
   
   
4. If the front balance shaft sprocket was removed, perform the following:
   1. Install a suitable and sturdy screw driver or drift through the maintenance hole in the shaft behind the sprocket to hold the front balance shaft.
   2. Install the front balance shaft sprocket and mounting nut. Torque the nut to 22 ft. lbs. (29 Nm).
   
   
5. Make sure the balance shafts and crankshaft are in the TDC position.
6. Remove the crankshaft pulley, and if removed, install the balance shaft belt drive sprocket.
7. Install the balance shaft belt, making sure the balance shafts and sprockets are still in the TDC position.
8. If removed, install the balance shaft belt tensioner and tension the balance shaft belt.
9. Loosen, then retighten the tensioner adjusting nut to 33 ft. lbs. (45 Nm).
10. Remove the 6 x 1.0mm x 100mm rear balance shaft holding bolt.
11. Temporarily install the crankshaft pulley and rotate the crankshaft 2 revolutions counterclockwise, stopping at TDC.

WARNING If any resistance is felt, stop immediately and determine the cause.

1. Recheck that all of the TDC marks align for both the camshaft and balance shafts.
2. Loosen, then retighten the tensioner adjusting nut to 33 ft. lbs. (45 Nm).
3. Remove the 6 x 1.0 mm x 25 mm bolt used to secure the camshaft timing belt tensioner.
4. Remove the crankshaft pulley and install the lower cover.
5. Install the crankshaft pulley, lubricate the bolt threads and both sides of the crankshaft pulley bolt with fresh engine oil and tighten the crankshaft pulley bolt to 181 ft. lbs. (245 Nm). Do Not use an impact wrench.

See Figures 19 and 20

Fig. Fig. 19: Holding the rear timing balancer shaft-4-cylinder Odyssey

Fig. Fig. 20: Aligning the front timing balancer shaft-4-cylinder Odyssey

1. Install the upper timing cover and the valve cover. Be sure the seals are properly seated.
2. Install the side engine mount. Tighten the through-bolt to 47 ft. lbs. (64 Nm). Tighten the mount nut and bolt to 40 ft. lbs. (55 Nm) each.
3. Remove the floor jack.
4. Install and tension the alternator belt.
5. Install the power steering pump and tension its belt.
6. Install the splash shields.
7. Reconnect the positive and negative battery cables. Enter the radio security code.
8. Check engine operation.

Did you put alot of pressure on belt when installed ? to tight will cause that vibration

hi from uk assume you have renewed c/belt and balance shaft timing belt? if so? and sure your timing marks on cams and the c/shaftcog are correct ? the oil pump also correctly aligned with marks? and the balance shaft gear also has time marking ? want to run thro how and which marks you have aligned and at TDC No1 all belt/s have to be aligned ??

always be sure to set to top dead cyl1 before removing belt. there will be mark on the cam gear and another on flywheel seen through passage in bellhousing there will also be a timing mark on the balance shaft. I found it best to ignore timing mark on balance shaft gear and just remove distributor cap. you will see rotor pointing to #1 plug wire and rotor will also line up to a small notch in distributor body. this way is more accurate. also after setting timing belt turn motor over 2 full turns then recheck timing marks again. while your in there check the bearings in all idler pulleys and tensioner pulleys, hate to have to go back in there again just for a noisey bearing later. good luck.