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Showing posts with label car belts. Show all posts
Showing posts with label car belts. Show all posts

Monday, December 12, 2011

How to Replace Drive Belt Tensioner?

The car drive belt.Its also called as Serpentine belt or Accessory belt.This belt is used to drive accessories including the alternator, water pump, AC compressor, power steering, air pump, vacuum pump and injector pump. They're usually driven by the engine's crankshaft pulley and are fully adjustable by tensioners or idlers that follow or track the surface of the belt.This belts are basically made of reinforced synthetic and/or hard rubber, belts are usually v-channeled or ribbed serpentine.
The belt Tensioner is the device that functions as an idler pulley and is located on either the inside or outside of the accessory drive belt. Its provides the correct tension for initial belt adjustment and maintains this critical tension adjustment during vehicle operation. It can be found on conventional V-belts and the newer serpentine ribbed belts.
See the image below drive belt and drive belt tensioner
 

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Before replacing Drive Belt Tensioner,First inspect the Belt tensioner.
The details are as follows :----
Inspect the belt tensioner for the following conditions:
Noise
  • If the belt squeals, the tensioner force may be insufficient. Check the belt length gauge, if the length is correct, replace the tensioner.
  • If the tensioner clatters or rattles during engine operation, there may be internal interference or wear. Replace the tensioner.
  • If the belt chirps, you may have a worn pulley or tensioner or cracks in the tensioner bas or arm. Check the mounting bolts, if they are okay, replace the tensioner.
Sticking or Seized Tensioner or Idler
  • If the tensioner does not operate smoothly or doesn't move, you may have: internal thrust surface damage/wear, internal damage/wear, or a broken spring, replace the tensioner.
Appearance
  • Inspect the tensioner arm for cracks or other damage. If the tensioner is broken, it should be replaced.
  • Look for excessive tensioner movement at idle, which can indicate internal wear, an out-of-round pulley or loose mounting bolts. Check the mounting bolts, it they are in good condition, replace the tensioner.
  • Make sure the tensioner is not tilted or misaligned. Also make sure a gap exists between the tensioner arm and base. If you notice a problem, check the mounting surface, it the surface is okay, replace the tensioner.
Belt Tracking
  • If the belt does not track properly on the pulley tracking surface, you'll need to troubleshoot the problem. Check the mounting bolts and the system alignment. Then, make sure the correct belt is being used for the vehicle. If all of these things are intact, replace the tensioner.
Belt Length Indicator
  • A belt length indicator is built into each tensioner.
  • The gauge identifies the effective operating range of the tensioner.
  • It consists of a pointer and either two or three length marks.
    • On a three-mark gauge minimum belt length, maximum belt length and ideal belt length are indicated.
    • On a two-mark gauge only minimum belt length and maximum belt length are indicated.
    • Ideal belt length on a two-mark gauge is generally half way between the minimum and the maximum.
  • When a belt wears and stretches with age the tensioner will move towards the maximum belt length to maintain proper tension.
  • As the pointer nears the maximum length mark, replace the belt.

For all types of

Drive belt routing diagrams for cars and trucks?

Click the link below:---
http://technoanswers.blogspot.com/2011/10/drive-belt-routing-diagrams-for-cars.html
To replace belt tensioner,the details are as follows :----
WARNING
Never open a tensioner assembly to repair internal parts. The spring is powerful and preloaded and may cause serious injury. Worn tensioner assemblies should be replaced with a new assembly, since there are no serviceable internal parts. Only pulleys can be replaced.
Because tensioners are vehicle-specific, there is no universal replacement procedures. On some vehicles, tensioner replacement is a simple as removing one bolt, while other vehicles may require removal of several parts to get to the tensioner base. Refer to your vehicle's service manual for replacement procedures and bolt torque recommendations.
NOTE
When replacing a tensioner, belt and fixed idler pulley replacement is also recommended (if one is used). A used belt will function properly with a new tensioner, but belts and pulleys have generally reached their useful life expectancy when the tensioner requires replacement.

This procedure will help you to inspect car belt tensioner and replace it,if its faulty/worn out.
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If you need dis-assembly or replacement instructions for any other auto/car part, or you want to ask question related to your car/truck jeep problem then please leave the comment with your details, so I can provide you the required instructions and solutions.

To know more about car battery,see the list below:---




Posted by Hemant somaiya at 6:35 AM 0 comments
Labels: accessory drive belt, belt routing, car belt tensioner, car belts, drive belt pulley, drive belt tensioner, inspect belt tensioner, replace drive belt, serpentine belt

Monday, November 21, 2011

How to replace Timing Belt Sprockets on Audi car models?

If you need dis-assembly or replacement instructions for any other auto/car part, or you want to ask question related to your car/truck jeep problem then please leave the comment with your details, so I can provide you the required instructions and solutions.



The procedure is as follows :----

Timing Belt Sprockets


removal & installation
  1. Note the radio security code and disconnect the negative battery cable.
  2. On 1.8L engines, place the (hood) lock carrier in the service position. For additional information, please refer to the following topic(s): Body And Trim, Service Position, Front Bumper, Hood Lock Carrier.
  3. Rotate the engine to Top Dead Center (TDC) on the firing stroke for cylinder No. 1.
  4. Remove the accessory drive belts.
  5. Remove the accessory drive belt pulley/damper assembly.
  6. On 1.8L engines, remove the torque arm mounting bracket.
  7. Hold the crankshaft timing belt gear, using Tool No. 3099, or its equivalent.
  8. Loosen the crankshaft and/or camshaft and/or intermediate shaft sprocket mounting bolt(s) 1 turn.
  9. Remove the timing belt.
  10. Remove the sprocket mounting bolt(s), if necessary remove the retaining tool and remove the sprocket(s). If the sprocket is seized to the shaft, install the mounting bolt flush and then back it out 3 turns and use a suitable gear puller to loosen and remove the sprocket. If a gear puller is used, as the sprocket moves off the shaft, in may be necessary to back out the mounting bolt.
To install:
  1. Clean the shaft mounting surface(s) and sprocket(s) as necessary. The surfaces must be clean and dry.

NOTE
If removed, the crankshaft sprocket bolt must not be reused.

  1. If the crankshaft sprocket and/or bolt were removed:
    1. The crankshaft sprocket bolt must be replaced.
    2. If removed, install the sprocket onto the crankshaft.
    3. Using a new bolt, lightly oil the threads and thrust surface of the bolt.
    4. Install the bolt finger tight.
  2. Install the timing belt gear holding Tool No. 3099, or its equivalent.
  3. If the crankshaft mounting bolt was previously loosened or removed, using a new, properly oiled bolt, tighten and torque as follows:
1.8L and 2.0L SOHC (ABA) engines:


Step 1: 66 ft. lbs. (90 Nm)
Step 2: 90° ( 1 / 4 turn)

2.0L DOHC (9A) engine:


Step 1: 22 ft. lbs. (30 Nm)
Step 2: 90° ( 1 / 4 turn)

  1. If the camshaft or intermediate shaft sprockets were removed, install the removed sprocket(s) making sure the TDC timing marks are properly aligned and install the mounting bolt(s) until they are lightly bottomed and the sprocket seated. Do NOT allow the shafts to move.
  2. Install and properly tension the timing belt.
  3. Tighten the camshaft and/or intermediate shaft sprocket bolt(s) as follows:
1.8L engine:


Camshaft/intermediate shaft: 48 ft. lbs. (65 Nm)

2.0L SOHC (ABA) engine:


Camshaft/intermediate shaft: 60 ft. lbs. (80 Nm)

2.0L DOHC (9A) engine:


Camshaft/intermediate shaft: 48 ft. lbs. (65 Nm)

  1. The balance of the assembly is in reverse order of removal, making sure all gears and shafts are properly timed and installed.
2.8L V6 Engines
  1. Note the radio security code and disconnect the negative battery cable.
  2. Place the (hood) lock carrier in the service position. For additional information, please refer to the following topic(s): Body And Trim, Service Position, Front Bumper, Hood Lock Carrier.
  3. Remove the accessory drive belt.
  4. Rotate the engine to Top Dead Center (TDC), then remove from the left side of the engine:
    1. On SOHC (AFC) engines, the Crankshaft Position (CKP) sensor.
    2. On DOHC 5V engines, the sealing plug.
  5. Install and lock the crankshaft in position using tool No. 3242 or its equivalent.
  6. If the crankshaft sprocket and/or bolt is to be removed, loosen the crankshaft sprocket mounting bolt 1 turn.
  7. If the camshaft sprocket and/or bolt is to be removed,
    1. On SOHC (AFC) engines, install camshaft holding fixture Tool No. 3243.
    2. On DOHC 5V engines, install camshaft holding fixture Tool No. 3391.
  8. Loosen the camshaft sprocket mounting bolt(s) 1 turn.
  9. Remove the timing belt.

NOTE
The sprockets are not keyed and are mounted on a tapered shaft. A suitable gear/sprocket puller most likely will be needed.

  1. Remove the sprocket mounting bolt(s) and sprocket(s). If the sprocket is seized to the shaft, install the mounting bolt flush and then back it out 3 turns and use a suitable gear puller such as Tool No. 3032 or Kukko® 20-10 or their equivalent to loosen and remove the sprocket. If a gear puller is used, as the sprocket moves off the shaft, in may be necessary to back out the mounting bolt.
To install:
  1. Clean the shaft mounting surface(s) and sprocket(s) as necessary. The surfaces must be clean and dry.

NOTE
If removed, the crankshaft sprocket bolt must not be reused.

  1. If the crankshaft sprocket and/or bolt were removed:
    1. The crankshaft sprocket bolt must be replaced.
    2. If removed, install the sprocket onto the crankshaft.
    3. Using a new bolt, lightly oil the threads and thrust surface of the bolt.
    4. Install the bolt finger tight.
  2. Install Tool No. 3342, or its equivalent.
  3. If the crankshaft mounting bolt was previously loosened or removed, using a new, properly oiled bolt, tighten and torque as follows:
  4. Step 1: 148 ft. lbs. (200 Nm)
  5. Step 2: 180° ( 1 / 2 a turn)
  6. If the camshaft sprockets were removed, install the removed sprocket(s) and install the mounting bolt(s) until they are lightly bottomed and the sprocket lightly seated but still moveable.
  7. On SOHC (AFC) engines, install camshaft holding fixture Tool No. 3243.
  8. On DOHC 5V engines, install camshaft holding fixture Tool No. 3391
  9. Install and properly tension the camshaft timing belt.
  10. Tighten the camshaft shaft sprocket bolts as follows:
SOHC (AFC) engine:


Step 1: 22 ft. lbs. (30 Nm)
Step 2: 180° ( 1 / 2 a turn)

On DOHC 5V engines:


41 ft. lbs. (55 Nm)

  1. The balance of the assembly is in reverse order of removal, making sure all gears and shafts are properly timed and installed.
Inspection
Inspect the sprockets for the following:


Cracks
Damaged or worn teeth
Sharp edges



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This details will help.
Thanks.
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For more details :----

How to replace Timing Belt Cover on Acura Car models?

http://repairhelpcenter.blogspot.com/2011/11/how-to-replace-timing-belt-cover-on.html

How to replace Timing Belt and Sprockets on Acura Car models?

http://repairhelpcenter.blogspot.com/2011/11/how-to-replace-timing-belt-and.html

How to replace Timing Belt on Audi and VW car models?

http://repairhelpcenter.blogspot.com/2011/11/how-to-replace-timing-belt-on-audi-and.html

How to replace Timing Belt Cover on Audi and VW car models?

http://repairhelpcenter.blogspot.com/2011/11/how-to-replace-timing-belt-cover-on_21.html

For all types of

Timing belt routing diagrams for cars and trucks?

Click the link below:---
http://technoanswers.blogspot.com/2011/10/timing-belt-routing-diagrams-for-cars.html

For all types of 

Drive belt routing diagrams for cars and trucks?

Click the link below:---
http://technoanswers.blogspot.com/2011/10/drive-belt-routing-diagrams-for-cars.html

Posted by Hemant somaiya at 9:32 AM 0 comments
Labels: audi timing belt sprockets, car belts, car timing belt sprockets, drive belt removal, how to replace sprockets, removing timing belt sprockets, timing and drive belts, timing belt removal
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