How do you tightening drive belt

Drive Belts

• INSPECTION
• ADJUSTMENT
• REMOVAL & INSTALLATION

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INSPECTION

See Figures 1, 2, 3, 4 and 5
Check the condition and tension of all drive belts every 12,000 miles, or at least once a year. Loose drive belts can lead to poor engine cooling and diminished alternator, power steering pump, air conditioning compressor, or emission air pump output. A belt that is too tight places a strain on the bearings in the driven component.

Fig. Fig. 1: There are typically 3 types of accessory drive belts found on vehicles today

Fig. Fig. 2: An example of a healthy drive belt

Fig. Fig. 3: Deep cracks in this belt will cause flex, building up heat that will eventually lead to belt failure

Fig. Fig. 4: The cover of this belt is worn, exposing the critical reinforcing cords to excessive wear

Fig. Fig. 5: Installing too wide a belt can result in serious belt wear and/or breakage
Replace any drive belt that is glazed, worn, cracked, or stretched to the point where correct adjustment tension is impossible. If two belts are used to drive a component, always replace both belts when replacement is necessary. After installing a new belt, run the engine for ten minutes, shut OFF the engine and recheck the belt tension. Readjust if necessary.

ADJUSTMENT

See Figures 6, 7, 8, 9 and 10

Fig. Fig. 6: Engine belt tension chart-2.2L engines

Fig. Fig. 7: Engine belt tension chart-1987-89 2.5L engines

Fig. Fig. 8: Engine belt tension chart-2.6L engines

Fig. Fig. 9: Engine belt tension chart-1990-93 models

Fig. Fig. 10: Engine belt tension chart-1994-95 models
Two popular methods of checking drive belt adjustment are; the Belt Tension Gauge Method and the Belt Deflection Method. The former requires a special gauge and the latter requires a straight edge and scale or just a good eye for measurement. The deflection method will be used in the following belt replacement instructions. A rule of thumb for checking belt tension by the deflection method is to determine the midpoint between two pulleys of the drive belt and press down at that point with moderate thumb pressure. The belt should deflect to the measurement indicated in the following installation procedures. Adjustment is necessary if the belt is either too loose or too tight.

WARNING A belt adjustment which is either too loose or too tight will eventually damage the accessory that belt is driving. A too loose adjustment allows free-play in the belt which could transfer a whipping motion or shock to the accessory drive pulley. Similarly, a belt which is too tight will preload the accessory bearings, leading to early failure.

REMOVAL & INSTALLATION

See Figure 11
Raise the front of the vehicle, support on jackstands and remove the lower splash shield if access is hampered due to space limitations when changing drive belts.

Fig. Fig. 11: Support the vehicle, then remove the lower right side splash shield for access to the drive belts
2.2L Engines
A/C COMPRESSOR DRIVE BELT
See Figures 12, 13 and 14

Fig. Fig. 12: A/C compressor drive belt adjusting points-2.2L engines

Fig. Fig. 13: Loosening the locking screws for A/C compressor drive belt removal

Fig. Fig. 14: Removing the A/C compressor drive belt from under the vehicle

1. Loosen the idler pulley bracket pivot screw and the locking screw.
2. Remove the belt and install a replacement.
3. Using a breaker bar and socket apply torque to the welded nut provided on the mounted bracket to obtain proper tension.
4. Tighten the locking screw first, followed by pivot screw. Tighten to 40 ft. lbs. (55 Nm).

ALTERNATOR DRIVE BELT (CHRYSLER TYPE)
See Figures 15 and 16

Fig. Fig. 15: Alternator belt adjustment-2.2L engine

Fig. Fig. 16: Loosening the locking screw for alternator drive belt removal
If removal of the alternator belt is required, the A/C belt must first be removed.

1. Loosen the pivot nut, locking screw, and the adjusting screw.
2. Remove the belt and install a replacement.
3. Adjust to specification by tightening the adjusting screw.
4. Tighten the locking screw to 25 ft. lbs. (34 Nm).
5. Tighten the pivot nut to 30 ft. lbs. (41 Nm).

ALTERNATOR DRIVE BELT (BOSCH TYPE)
If removal of the alternator belt is required, the A/C belt must first be removed.

1. Loosen the pivot nut, locking nut, and adjusting screw.
2. Remove the belt and install a replacement.
3. Adjust to specification by tightening the adjusting screw.
4. Tighten the locking nut to 25 ft. lbs. (34 Nm).
5. Tighten the pivot nut to 30 ft. lbs. (41 Nm).

POWER STEERING BELT
If removal of the power steering belt is required, the A/C and alternator belts must first be removed.

1. Loosen the locking screw, and pivot screw.
2. Remove the belt and install a replacement.
3. Install a 1 / 2 in. breaker bar into the pump bracket slot, apply pressure with the breaker bar and adjust the belt to specification.
4. Tighten the locking screw first, then the pivot screw. Tighten to 40 ft. lbs. (55 Nm).

AIR PUMP DRIVE BELT
See Figure 17

Fig. Fig. 17: Air pump belt adjustment-2.2L engines
When servicing the air pump, use the square holes provided in the pulley to prevent camshaft rotation.

1. Remove the nuts and bolts retaining the drive pulley cover.
2. Remove the locking bolt and pivot bolt from the pump bracket, then remove the pump.
3. Remove the belt and install a replacement.
4. Position the pump, then install the locking bolt and pivot bolt finger-tight.
5. Install a 1 / 2 in. breaker bar into the bracket assembly (block the drive pulley to prevent camshaft rotation), and adjust the belt to specification.
6. Tighten locking bolt and pivot bolt to 25 ft. lbs. (35 Nm).

2.5L Engines
AIR CONDITIONING COMPRESSOR
See Figure 18

Fig. Fig. 18: Drive belt adjustment points-2.5L engines

1. Loosen the idler bracket pivot screw and the locking screws to replace, or adjust belt.
2. Remove the belt and install a replacement.
3. Adjust the belt to specification by applying torque to weld nut on the idler bracket.
4. Tighten locking screw first, followed by the pivot screw. Tighten to 40 ft. lbs. (55 Nm).

ALTERNATOR BELT
See Figure 18
If replacement of the alternator belt is required, the A/C drive belt must first be removed.

1. Loosen the pivot nut, locking nut, and adjusting screw.
2. Remove the belt and install a replacement.
3. Adjust the belt to specification by tightening the adjusting screw.
4. Tighten the locking nut to 25 ft. lbs. (35 Nm).
5. Tighten the pivot nut to 30 ft. lbs. (40 Nm).

POWER STEERING PUMP
See Figure 18
If replacement of the power steering belt is required, the A/C and alternator belts must first be remove.

1. Loosen the locking screw and pivot screw to replace, or adjust the belt.
2. Remove the belt and install a replacement.
3. Using a 1 / 2 in. breaker bar positioned in adjusting bracket slot, adjust the belt to specification.
4. Tighten the locking screw followed by the pivot screw. Tighten to 40 ft. lbs. (55 Nm).

2.6L Engines
ALTERNATOR/AIR CONDITIONING COMPRESSOR BELT
See Figure 19

Fig. Fig. 19: Drive belt adjustment points-2.6L engines

1. Loosen the locking screw, jam nut, and pivot nut.
2. Loosen the adjusting screw.
3. Remove the belt and install a replacement.
4. Adjust the belt to specification by tightening the adjusting screw.
5. Tighten the locking screw followed by the pivot nut. Tighten to 16 ft. lbs. (22 Nm).
6. Tighten the jam nut to 21 ft. lbs. (28 Nm).

POWER STEERING PUMP BELT
See Figure 19
If replacement of the power steering belt is required, the alternator and A/C belt must first be remove.

1. Loosen the pivot screw, and the locking screw.
2. Remove the timing pickup.
3. Remove the belt and install a replacement.
4. Install a 1 / 2 in. breaker bar in the adjusting bracket slot, torque to specification.
5. Tighten the locking screw, followed by the pivot screw. Tighten to 40 ft. lbs. (55 Nm).
6. Install the timing pick-up, and tighten to 160 inch lbs. (18 Nm).

the drive belt is too loose. you need to tighten the belt that drives the front rolller, which drives the walking belt. depending on the type of treadmill there shoudl be a way you can do this by loosening the motor and adjusting that to tighten the belt. it could also be that the belt needs to be replaced and also could be the walking belt. you should try to tighten the walking belt first. that is at the end of the treadmill where you walk on it. there are two holes one on each side of the treadmill where teh belt goes back under the treadmill. there are allen key bolts that you need to tighten clockwise one turn then try the treadmill. if it doesnt tighten then turn another full turn. if not tight enough then it might be the drive belt. if you tighten the walking belt all the way then try to tighten the drive belt.

This is the complete procedure from the service manual on how to replace the timing belt start to finish, start over to assure u get it right, if u mess up the engine will be damaged

Removal for 1.6L engines : ONLY 2006 to 2009 CARS


Engine removal is not required for this procedure.

1.Remove the engine cover.

2.Remove the RH front wheel.

3.Remove the 2 bolts and RH side cover.

4.Temporarily loosen the water pump pulley bolts.

5.Remove the alternator drive belt

6.Remove the air conditioner compressor drive belt

7.Remove the power steering pump drive belt

8.Remove the 4 bolts and water pump pulley.

9.Remove the 4 bolts and timing belt upper cover

10.Turn the crankshaft pulley, and align its groove with timing mark "T" of the timing belt cover. Check that the timing mark of camshaft sprocket is aligned with the timing mark of cylinder head cover. (No.1 cylinder compression TDC position)

11.Remove the crankshaft pulley bolt and crankshaft pulley

12.Remove the crankshaft flange

13.Remove the 4 bolts and timing belt lower cover

14.Remove the timing belt tensioner and timing belt.

15.Remove the bolt and timing belt idler

16.Remove the crankshaft sprocket

17.Remove the cylinder head cover.

(1)Remove the wire harness bracket

(2)Remove the ignition coil.

(3)Remove the PCV (Positive Crankcase Ventilation) hose and the breather hose from the cylinder head cover

(4)Remove the engine cover bracket

(5)Loosen the cylinder head cover bolts and then remove the cover and gasket.

18.Remove the camshaft sprocket.

Hold the portion of the camshaft with a hexagonal wrench, and remove the bolt with a wrench and remove the camshaft sprocket.

INSTALLATION:

1.Install the camshaft sprocket and tighten the bolt to the specified torque.

(1)Temporarily install the camshaft sprocket bolt

(2)Hold the portion of the camshaft with a hexagonal wrench, and tighten the bolt with a wrench
Tightening torque :78.5 ~ 98.1N.m (8.0 ~ 10.0kgf.m, 57.9 ~ 72.3lb-ft)



2.Install the cylinder head cover.

(1)Install the cylinder head cover and bolts
Tightening torque :7.8 ~ 9.8N.m (0.8 ~ 1.0kgf.m, 5.8 ~ 7.2lb-ft)

(2)Install the engine cover bracket

(3)Install the PCV(Positive Crankcase Ventilation) hose and breather hose to the cylinder head cover.

(4)Install the ignition coil.

3.Install the crankshaft sprocket

4.Align the timing marks of the camshaft sprocket and crankshaft sprocket with the No.1 piston placed at top dead center and its compression stroke.

5.Install the idler pulley and tighten the bolt to the specified torque.

Tightening torque :42.2 ~ 53.9N.m (4.3 ~ 5.5kgf.m, 31.1 ~ 39.8lb-ft)

6.Temporarily install the timing belt tensioner

7.Install the belt so as not give slack at each center of shaft. Use the following order when installing timing belt.
Crankshaft sprocket →idler pulley →camshaft sprocket →timing belt tensioner

8.Adjust the timing belt tension.

(1)Loosen the tensioner pulley mounting bolt and apply tension to the timing belt.

(2)After checking the alignment between each sprocket and each timing belt tooth, tighten the mounting bolt and one by one.

Tightening torque :19.6 ~ 26.5N.m (2.0 ~ 2.7kgf.m, 14.5 ~ 19.5lb-ft)

(3)Then recheck the belt tension.
Verify that when the tensioner and the tension side of the timing belt are pushed in horizontally with a moderate force [approx. 49N (11lb)], the timing belt cog end is aprox. 1/2 of the tensioner mounting bolt head radius (across flats) away from the bolt head center.

4)Timing belt tension measuring procedure
(by a sonic tension guage)
Rotate crankshaft in clockwise direction to set 1st piston on top dead center (TDC) and rotate crankshaft in counterclockwise to 90° then measure the belt tension in the middle of tension side span (in arrow direction of above illustration) by free vibration method.


9.Turn the crankshaft two turns in the operating direction (clockwise) and realign crankshaft sprocket and camshaft sprocket timing mark.


10.Install the timing belt lower cover with 5bolts

Tightening torque :7.8 ~ 9.8N.m (0.8 ~ 1.0kgf.m, 5.8 ~ 7.2lb-ft)

11.Install the flange and crankshaft pulley, and then tighten crankshaft pulley bolt. Make sure that crankshaft sprocket pin fits the small hole in the pulley.

Tightening torque :137.3 ~ 147.1N.m (14.0 ~ 15.0kgf.m, 101.3 ~ 108.5lb-ft)

12.Install the timing belt upper cover with 4 bolts.

Tightening torque :7.8 ~ 9.8N.m (0.8 ~ 1.0kgf.m, 5.8 ~ 7.2lb-ft)

13.Install the water pump pulley and 4 bolts.

14.Install the power steering pump drive belt

15.Install the air conditioner compressor drive belt

16.Install the alternator drive belt

17.Install the RH side cover with 2 bolts

18.Install the RH front wheel.


Tightening torque :88.3 ~ 98.1N.m (9.0 ~ 10.0kgf.m, 65.1 ~ 72.3lb-ft)

19.Install the engine cover with bolts.


Tightening torque :3.9 ~ 5.9N.m (0.4 ~ 0.6kgf.m, 2.9 ~ 4.3lb-ft)

This is caused by one of three problems. First and most likely, the walking belt is loose. To tighten the belt, start by locating the two bolts that adjust the rear roller (one on each side of the unit in the back). Run the unit at about 3 mph. Tighten the bolts a 1/4 turn at a time. Make sure that what you do to one side, you MUST do to the other side or the belt will get off center. After you tighten it 1/4 turn, check the belt to see if it is still slipping. If it is then tighten the belt 1/4 turn again. Continue until the belt does not slip, but do not tighten the bolts more than 2 full turns. If it takes more than 2 turns then something else is the problem. The second problem that it could be is the drive belt might be loose. To tighten the drive belt, start by removing the front cover. loosen the bolts around the motor then tighten the drive belt by tightening the motor adjuster bolt. Once the drive belt is tight, tighten the motor back down. The third problem that it could be is the walking belt could be worn and need to be replaced. Let me know if you have any questions.

This is caused by one of three problems. First and most likely, the walking belt is loose. To tighten the belt, start by locating the two bolts that adjust the rear roller (one on each side of the unit in the back). Run the unit at about 3 mph. Tighten the bolts a 1/4 turn at a time. Make sure that what you do to one side, you MUST do to the other side or the belt will get off center. After you tighten it 1/4 turn, check the belt to see if it is still slipping. If it is then tighten the belt 1/4 turn again. Continue until the belt does not slip, but do not tighten the bolts more than 2 full turns. If it takes more than 2 turns then something else is the problem. The second problem that it could be is the drive belt might be loose. To tighten the drive belt, start by removing the front cover. loosen the bolts around the motor then tighten the drive belt by tightening the motor adjuster bolt. Once the drive belt is tight, tighten the motor back down. The third problem that it could be is the walking belt could be worn and need to be replaced. Let me know if you have any questions.

This is caused by one of three problems. First and most likely, the walking belt is loose. To tighten the belt, start by locating the two bolts that adjust the rear roller (one on each side of the unit in the back). Run the unit at about 3 mph. Tighten the bolts a 1/4 turn at a time. Make sure that what you do to one side, you MUST do to the other side or the belt will get off center. After you tighten it 1/4 turn, check the belt to see if it is still slipping. If it is then tighten the belt 1/4 turn again. Continue until the belt does not slip, but do not tighten the bolts more than 2 full turns. If it takes more than 2 turns then something else is the problem. The second problem that it could be is the drive belt might be loose. To tighten the drive belt, start by removing the front cover. loosen the bolts around the motor then tighten the drive belt by tightening the motor adjuster bolt. Once the drive belt is tight, tighten the motor back down. The third problem that it could be is the walking belt could be worn and need to be replaced. Let me know if you have any questions.

Isuzu_Rodeo_Rodeo_Sport_1997-2004
Water Pump - Removal and Installation

3.2L Engines

1. Before servicing the vehicle, refer to the Precautions Section.
2. Drain the cooling system.
3. Remove or disconnect the following:
   Negative battery cable Upper radiator hose Timing belt. Refer to the Timing Belt procedure. Idler pulley Water pump

To install:




Fig. Exploded view of the water pump mounting



Fig. Water pump torque sequence. Apply LOCTITE® 262 to bolt number 3 (arrow)-3.2L and 3.5L engines

NOTE Apply Loctite® 262 to bolt number 3 prior to installation.

1. Install or connect the following:
   Water pump. Tighten the bolts in two passes, in sequence, to 18 ft. lbs. (25 Nm). Idler pulley. Torque to 38 ft. lbs. (52 Nm). Timing belt Upper radiator hose Negative battery cable
2. Fill the cooling system.
3. Start the engine and check for leaks.

3.2L Engine

1. Before servicing the vehicle, refer to the Precautions section.
2. Drain the cooling system.
3. Remove or disconnect the following: Negative battery cableRadiator hoseAccessory drive beltFront coverTiming belt. Refer to the Timing Belt unit repair section.Timing belt idler pulley Water pump
   Negative battery cable Radiator hose Accessory drive belt Front cover Timing belt. Refer to the Timing Belt unit repair section. Timing belt idler pulley Water pump

To install:



Fig. Water pump bolt tightening sequence-3.2L engines

1. Install or connect the following: Water pump. Tighten the bolts in sequence to 18 ft. lbs. (25 Nm).Timing belt idler pulley. Tighten the bolt to 38 ft. lbs. (52 Nm).Timing beltFront coverAccessory drive beltRadiator hoseNegative battery cable
   Water pump. Tighten the bolts in sequence to 18 ft. lbs. (25 Nm). Timing belt idler pulley. Tighten the bolt to 38 ft. lbs. (52 Nm). Timing belt Front cover Accessory drive belt Radiator hose Negative battery cable


2. Fill the cooling system.
3. Start the engine and check for leaks.

Hope this help (remember rated and commento).

2005 Pontiac Vibe FWD L4-1.8L VIN 8

Alternator: Service and Repair
Generator Replacement
GENERATOR REPLACEMENT
REMOVAL PROCEDURE
CAUTION:
- Refer to Battery Disconnect Caution in Service Precautions.
- Failure to observe step 1 may result in a serious personal injury. If a tool is shorted at the generator lead, the tool will become hot
enough to cause a serious burn.
1. Disconnect the negative (-) battery cable.
2. Loosen the belt tension by turning the drive belt tensioner clockwise.
3. Remove the drive belt.
4. Disconnect the wire clamp (3) from the wire clip.
5. Remove the terminal cap and nut (1).
6. Disconnect the engine wire.
7. Disconnect the generator connector (2).
8. Remove the two mounting bolts.
9. Remove the generator (4).
INSTALLATION PROCEDURE
1. Install the generator (4) to the vehicle.
NOTE: Refer to Fastener Notice in Service Precautions.
2. Secure the generator with the two generator mounting bolts.
Tighten
- Tighten the upper bolt to 25 N.m (18 lb ft).
- Tighten the lower bolt to 54 N.m (40 lb ft).
3. Connect the generator connector (2).
4. Connect engine wire to the generator.
5. Secure the engine wire with the nut.
Tighten
Tighten the nut to 9.8 N.m (86 lb in).
6. Install the terminal cap (1) to the nut.
7. Install the wire clamp (3) to the wire clip.
8. Install the drive belt.
- Visually inspect the drive belt for wear and damage.
- Minor cracks on the ribbed side of the belt are considered acceptable. Replace the belt if pieces are missing from the ribs.
- Ensure that the belt tensioner moves downward when the belt is pressed down in the center with a force of approximately 98 N (22 lb).
9. Connect the negative (-) battery cable.
Tighten
Tighten the bolt to 15 N.m (11 lb ft).

Removal Procedure

1. Remove the drive belt.
   
2. Remove the drive belt tensioner bolt.
3. Remove the drive belt tensioner.

Installation Procedure

1. Install the drive belt tensioner.
Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

2. Install the drive belt tensioner bolt.
Tighten
Tighten the drive belt tensioner bolt to 50 N·m (37 lb ft).

3. Install the drive belt

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