Tension bolts need to be tighten - Cars & Trucks

Four cylinder engine - loosen bottom pivot bolt on alternator, then loosen top bolt and pull the alternator away from the engine to tighten belt. When at proper tension, tighten top bolt to hold tension and tighten bottom pivot bolt.
Six cylinder engine - loosen the lock bolt at the bottom of the alternator, then use the adjustment bolt (perpendicular to the lock bolt) to tighten the belt tension. Once properly tensioned, tighten the lock bolt.

If the tensioner doesn't automatically reset to the proper position, then the spring in the tensioner arm is bad. Need to replace the tensioner assembly, in that case.

Assuming that the belt is not broken ... you need to tighten the belt. This one is not as easy as the other two which have tensioners. This belt is tensioned by the alternator itself. I've found adjusting it to not be a lot of fun ... the tricky part is loosening the bolt that the alternator pivots on. There isn't a lot of room and I find one of the small palm ratchets to be helpful. So to tighten, you'd loosen the upper bolt that actually holds the tension on the belt, loosen the bolt that the alternator pivots on, re-tension the belt (using something to pry on the alternator if necessary) and tighten the two bolts again. If you have to replace the belt you'll need to remove the outer two to get to this one. The outer two tensioners are adjusted by loosening the bolt that holds the tensioner pulley in place and then turning the tensioner bolt itself to tighten or loosen the belt(s)... then retighten the bolt holding the pulley.

Timing Belt Removal & Installation SOHC To Remove:

1. Disconnect battery negative cable.
2. Remove fresh air duct.
3. Drain engine coolant into an appropriate container and retighten radiator drain plug.
4. Remove upper radiator hose.
5. Remove fan clutch assembly bolts.
6. Remove 5 cooling fan shroud bolts.
7. Remove fan shroud and fan as an assembly.
8. Loosen alternator mounting bolts and remove drive belt from pulley.
9. Remove fan pulley.
10. Remove 4 cooling fan assembly bolts.
11. Remove cooling fan assembly.
12. Remove 4 bolts and upper timing belt cover.
13. Remove 2 lower bolts and lower timing belt cover.
14. Loosen adjusting bolt and remove A/C belt.
15. Remove alternator belt.
16. Loosen power steering pump lock bolt and mounting bolt.
17. Remove drive belt from crankshaft damper. Camshaft timing marks
    
    
18. Turn crankshaft until timing mark on front housing and the arrow "2" on the camshaft pulley align.
19. Remove 5 bolts and remove damper.
20. Remove timing belt guide from timing belt pulley.
21. Loosen tensioner lock bolt.
22. Pry tensioner away from timing belt and tighten lock bolt to relieve tension on the timing belt. NOTE: Mark the direction of timing belt rotation on the belt if it is being reused.
    
23. Remove timing belt.

To Install:
Timing belt pulley timing marks

NOTE: Timing belt pulley timing mark and timing mark must be aligned.
Camshaft timing marks

NOTE: The arrow at "2" on camshaft pulley must be aligned with timing mark on front housing.
Timing belt installation

1. Install timing belt with minimal slack from timing belt pulley to water pump and from water pump to camshaft pulley.
2. Loosen tensioner lock bolt until tension is applied to timing belt. CAUTION
   Do not turn crankshaft counterclockwise.
   
3. Turn crankshaft pulley 2 full turns clockwise and ensure timing marks are properly aligned.
4. Tighten tensioner lock bolt to 33 ft lb (45 Nm).
5. Apply a force of 21 lb to timing belt midway between idler pulley and camshaft pulley.
   • Deflection should measure 0.43-0.51 inch (11-13 mm)
   NOTE: if timing belt deflection is incorrect remove timing belt and install NEW tensioner spring.
   
6. Install timing belt guide.
7. Install crankshaft damper pulley.
8. Install 5 crankshaft damper pulley bolts. Tighten bolts to 132 in lb (15 Nm).
9. Install power steering pump drive belt.
10. Adjust power steering pump drive belt tension and tighten lock bolt and mounting bolt.
11. Install alternator drive belt.
12. Install A/C drive belt.
13. Install lower timing belt cover and bolts. Tighten bolts to 84 in lb (10 Nm).
14. Install upper timing belt cover and bolts. Tighten bolts to 84 in lb (10 Nm).
15. Install cooling fan assembly and 4 bolts. Tighten bolts to 27 ft lb (37 Nm).
16. Install fan pulley.
17. Install fan clutch and shroud as an assembly. Tighten bolts to 74 in lb (8 Nm).
18. Tighten 4 cooling fan nuts to 16 ft lb (22 Nm).
19. Adjust alternator belt tension and tighten alternator mounting bolts.
20. Install upper radiator hose.
21. Install fresh air duct.
22. Connect battery negative cable.
23. Refill/bleed cooling system.

DOHC To Remove:

1. Disconnect battery negative cable.
2. Remove fresh air duct.
3. Remove 5 cooling fan shroud bolts and 4 thermo-modulated fan nuts.
4. Remove 4 thermo-modulated fan shroud fasteners.
5. Remove generator drive belt.
6. Remove fan pulley (located above crankshaft pulley).
7. Remove 4 bolts and splash shield (located under front of vehicle).
8. Remove A/C drive belt and power steering drive belt. Timing Belt Removal
   
   
9. Remove 5 bolts and upper timing belt cover.
10. Remove 2 bolts and lower timing belt cover.
11. Loosen tensioner lock bolt and pivot tensioner pulley outboard.
12. Retighten tensioner lock bolt. NOTE: Mark timing belt for rotation if it is being reused.
    
13. Remove timing belt.

To Install:
Crankshaft match marks

1. Align marks on timing belt pulley and pump body. Camshaft pulley alignment marks
   
   
2. Align marks on camshaft pulleys with alignment marks on seal plate.
3. Install timing belt. NOTE: No looseness should exist on the tension side and at the camshaft pulleys.
   
4. Loosen tensioner lock bolt.
5. Turn crankshaft 2 revolutions in direction of rotation and check that timing marks are still in alignment.
6. Tighten timing belt tension lock bolt to 27-38 ft lb (32-52 Nm).
7. Apply a force of 22 lbs to timing belt between camshaft sprockets.
   • Belt deflection should measure 0.30-0.33 in (7.5-8.5 mm)
   NOTE: Replace tensioner spring if timing belt deflection is excessive.
   Timing Belt Installation
   
   
8. Install lower timing belt cover.
9. Install upper timing belt cover.
10. Install power steering drive belt and adjust belt tension.
11. Install fan pulley.
12. Install generator drive belt and adjust belt tension.
13. Install A/C drive belt and adjust belt tension.
14. Install splash guard.
15. Install fan and fan shroud.
16. Install 4 fan bolts. Tighten to 24 ft lb (33 Nm).
17. Install fan shroud mounting bolts.
18. Install fresh air duct.
19. Connect hose to resonance chamber.
20. Connect battery negative cable.

Removal & Installation

1. Remove the accessory drive belt cover, if equipped.
   
2. Loosen the lock bolt (bottom) of the front belt tensioner.
   
3. Loosen the slider bolt (top) of the front belt tensioner.
   
4. Remove the front side belt.
   
5. Loosen the lock bolt (bottom) of the rear belt tensioner.
   
6. Loosen the slider bolt (top) of the rear belt tensioner.
   
7. Remove the rear side belt.
   

To install:

NOTE Wipe off any oil or water on the belt and pulley.

1. Install the rear side belt, then tighten the slider bolt until the belt reaches the specified tension. Please refer to the following topic: “Accessory Drive Belts”, “Adjustment.”
   
2. Tighten the lock nut of the rear belt tensioner to 18 ft. lbs. (25 Nm).
   
3. Install the front side belt, then tighten the slider bolt until the belt reaches the specified tension. Please refer to the following topic: “Accessory Drive Belts”, “Adjustment.”
   
4. Tighten the lock nut of the front belt tensioner to 17 ft. lbs. (23 Nm).
   
5. Install the accessory drive belt covers.
   

The alternator is held in place by two bolts.

Top and bottom bolts - 12 mill bolts.

By loosening the bolts (especially the top bolt) you will find that the alternator can be manipulated forward and backwards alongs it housing (guides). To tighten the alternator belts all you need to do is push the alternator away from the tensioners and tighten the belt as required.

Once the belt is taut, but not stetched, simply tighten the two bolts up again and check that the belt has not lost its tension when you where tightening the belts.

Disconnect battery earth lead. Do not turn crankshaft or camshaft whn timing beld removed. Remove spark plugs to ease turning engine. Turn engine in normal direction of rotation (unless otherwise stated) Do not turn engine via camshaft or other sprockets. Observe all tightening torques. Remove engine, remve RH engine mounting. Remove auxiliary drive belts, water pump pulley, crankshaft pulley, timing belt upper cover, timing belt lower cover. Turn crankshaft clockwise to TDC on No. 1 cylinder, slacken tensioner bolts 5 & 6. Move tensioner away from belt and lightly tighten bolts. Remove timing belt. Remove water pump and replace with new one. Suggest to replace cambelt as well.
Installation
Ensure timing marks aligned3 & 4. Fit timing belt in anti-clockwise direction, standing at crankshaft sprocket. Ensure belt is taut between sprockets on non-tensioned side. Slacken tensioner bolt 5. slacken tensioner bolt 6. Allow tensioner to operate. Tighten tensioner bolt 6. Tighten tensioner bolt 5. Turn crankshaft on turn clockwise. Ensure crankshaft sprocket timing marks aligned 4.
Slacken tensioner bolt 5. Slacken tensioner bolt 6. Allow tensioner to operate. Tighten tensioner 6. Tighten torque: 20 - 26 Nm. Tighten tensioner bolt 5. tighten torque: 20 - 26 Nm. Apply thumb pressure to belt at middle. Approximately 5kg. Belt should deflect to 1/4 of tensioner bolt head width 7. Belt tention can also be set using burroghs (BT-33-73F) tension gauge 10 at middle. Turn crankshaft 90 ° anti clockwise. Check belt tension is 9.5 16,5kg (engine must be cold). Install components in reverse order of removal. Fit cranckshaft pully. Tighten crankshaft pully bolts 8. G4-J: Tightening torque: 12-15Nm.
G4-N/G4-k: Tightening torque: 10-12Nm
G4EA: Tighten crankshaft pully bolt 9. Tighten torque: 140-150Nm.

Disconnect battery earth lead. Do not turn crankshaft or camshaft when timing belt removed. Remove spark plugs to ease turning engine. Turn engine in normal direction of ratation unless otherwise stated, Support engine. Remove, engine mounting, auxilliaty drive belts. Water pump pulley 1. Crankshaft pulley bolts 21. crankshaft pully 2. timing belt covers 3. Turn crankshaft to TDC on No 1 cyclinder. Ensure crankshaft sprocket, camshaft sprocket, oil pump sprocket and balancer shaft sprocket timing marks aligned. Timing marks on camshaft sprockets should align with cylinder head upper face. Dowel pins on camshaft sprockets should face upwards. Slacken tensioner bolt. Move tensioner away from belt and lightly tighten bolt. Remove, automatic tensioner unit bolts. Automatic tensioner unit. Timing belt, crankshaft centre bolt, crankshaft sprocket. Crankshaft sprocket guide washer. Slacken blancer shaft belt tensioner bolt. Move tensioner away from belt and lightly tighten bolt. Remove balancer shaft belt.

Installation
Ensuring timing marks arligned. Note timing marks on camshaft sprockets should align with cylinder head upper face. Exhaust sprocket mark is on recess, but inlet sprocket mark is on tooth. Note: to check oil pump sprocket positioned correctly, removing blanking plug from cylinder block. Insert 8mm diameter Phillips srcrewdriver in hole. Ensure screwdriver is inserted 60mm from face of cylinder block. if screwdriver can only be inserted 20mm: turn oil pump sprocket 360°. Insert screwdriver again. Fit balancer shaft belt in anti-clockwise direction, starting at crankshaft sprocket. Slacken balancer shaft belt tensioner bolt. Turn tensioner clockwise to tension belt. Tighten bolt to 15-22Nm. Apply thumb pressure to belt. Belt should deflect 5-7 mm. If not repeat tensioning procedure. Install crankshaft sprocket guide washer, crnakshaft sprocket. Tighten crankshaft cente bolt. Tighten torque:110-130 Nm. Note ensure crankshaft sprocket guide washer is fitted correclty. Oil treads and contact face of crankshaft body before fitting. Check tensioner body for leakage or damage replace if necessary. Check pushrod protrusion is 12mm. If not replace automatic tensioner unit. Slowly compress pushrod into tensioner body until holes aligned. Resistance should be felt. Place flat washer under tnesioner body to avoid damage to body end plugs. Retain pushrod with suitable pin through hole in tensioner body. install automatic tensioner unit to cylinder block. Tighten bolts to 22-27Nm. Fit timing belt in anti-clockwise direction, starting at the tensioner pulley. Slacken tensioner pulley bolt. Turn tensioner pully clockwise to temporarily tension belt. Tighten bolts to 43-45Nm. Turn crankshaft slowly 1/4 turn anti-cockwise. Turn crankshaft clockwise until timing marks alligned. Slacken tensioner pully bolt. Fit tool to tensioner pulley. Tool No 09244 28100. Apply clockwise torque of 2,6-2,8 Nm to tensioner pulley. Tighten bolt to 43-45Nm. Insert special tool in timing belt rear casing. Tool no 09244-28000. Screw in tool until pin can be removed from automatic tensioner unit. Remove special tool. Tool nr 09244-28000. turn crankshaft two turns clockwise. Wait 15 minutes. Ensure timing marks aligned. Check extended length of pushrod is 3,8-4,5mm. Install components in reverse order of removal. Tighten crankshaft pulley bolts, Tighten torque 20-30Nm

Yes, very easy...here is the steps to do it:

To Remove:

1. Disconnect battery negative cable.
2. Remove air cleaner inlet pipe.
3. Disconnect alternator electrical connections.
4. Loosen (but do not remove) pivot bolt and tensioner mounting bolt.
5. Remove drive belt form alternator pulley.
6. Remove tensioner mounting bolt and belt tensioner.
7. Remove pivot bolt, loosen adjusting bracket bolt and rotate bracket up.
8. Remove alternator.

To Install:

1. Place alternator on engine.
2. Install (but do not tighten) pivot bolt.
3. Rotate bracket down on top of alternator.
4. Install belt tensioner and install bolt loosely.
5. Install drive belt on alternator pulley.
6. Tighten tensioner bolt to 14-19 ft lb (19-26 Nm).
7. Tighten pivot bolt and bracket bolt to 28-38 ft lb (38-51 Nm).
8. Connect alternator electrical connections.
9. Install air cleaner inlet pipe.
10. Connect battery negative cable.

This procedure involves correcting the tension on the power steering accessory and A/C compressor drive belt.

1. Loosen the power steering pump locking bolts A and B and pivot bolt C(Illustration 1 and 2 ) to allow adjustment of belt tension.
2. Using a 1/2" breaker bar, adjust belt tension by applying torque to the square hole "D" on the power steering pivot bracket. Adjust the tension as follows:

Belt tension with no belt replacement: A. Using the Belt Tension Gauge Special Tool Kit C-4162, adjust the belt tension to 100 lb.
B. Tighten in order, first tighten the locking bolt A to 27 Nm (20 ft. Ibs) then, bolt B to27Nm (20 ft. Ibs). Finally tighten the pivot bolt C to 54 Nm (40 ft. Ibs).
Belt tension with belt replacement:
A. Using the Belt Tension Gauge Special Tool Kit C-4162, adjust the belt tension to 135 lb.
B. Tighten in order, first tighten the locking bolt A to 27 Nm (20 ft. Ibs) then, bolt B to 27Nm (20 ft. Ibs). Finally tighten the pivot bolt C to 54 Nm (40 ft. Ibs).
C. Start the engine and allow the vehicle to idle for 15 minutes to allow the belt to seat.
D. Repeat the belt tensioning procedure, set belt tension to 135 lb.

click here for picture 1
click here for picture 2