Question about 1994 Mercury Cougar

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Does the idler pulley on a 1994 mercury cougar do anything besides route the belt? Is the pulley attached to any interal engine parts?

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The idler pulley is not attached to any internal engine parts. It's job is to route the belt and to make sure the belt gets sufficient friction on the pulleys (it make it wrap around more if the outer surface of the pulley for more "traction") It is necessary, but it is just a pulley and a bearing.

Posted on Dec 10, 2009

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1 Answer

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Apparently the serpentine belt was thrown off my 1998 Mercury Mystique. It appears in good condition. Should it be replaced or can it be reused? Also, do you have a belt diagram? Thank-you.


You can reuse it. But you need to find out why it was thrown off. Check all the pullies by grabbing them and checking for side to side movement, With the exception of the power steering pump pulley (which has some in and out play) they all should have no play. Just turn in nice smooth circles. Sorry I don't have the diagram, but there should be one under the hood. Sometimes on the bottom of the hood.

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How to install a new alternator belt for a 1994 BMW 540i


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1 Answer

I need a belt diagram for a Mercury Grand Marquis 4.6L V8 engine 2006


SECTION 303-05: Accessory Drive 2006 Crown Victoria/Grand Marquis Workshop Manual DESCRIPTION AND OPERATION Procedure revision date: 03/18/2008 Accessory Drive adobe.gif Printable View (104 KB) The accessory drive system:
  • has a single serpentine accessory drive belt with 6 ribs.
  • has an idler pulley.
  • has an automatic drive belt tensioner.
  • is not adjustable.
The accessory drive system provides power to operate components which power other systems. These could include components such as the generator, power steering pump and A/C compressor. Each of these components is equipped with a pulley which is driven by the accessory drive belt. The accessory drive belt is driven by the engine crankshaft pulley. One or more idler pulleys may be provided to facilitate belt routing and alignment. The automatic belt tensioner maintains correct belt tension and compensates for component wear and changes in system load. System load changes can be caused by the A/C compressor clutch engaging or disengaging, or demand changes on other systems powered by the accessory drive belt. To maintain correct operation of this system, it is critical that the correct length drive belt be installed. The pulleys must also be correctly aligned and kept clean.
Accessory Drive Belt Routing
n0037351.jpg
Item Part Number Description 1 8678 Accessory drive belt idler pulley 2 10344 Generator pulley 3 8620 Accessory drive belt 4 3A733 Power steering pump pulley 5 6312 Crankshaft pulley 6 8509 Coolant pump pulley 7 2E884 A/C clutch pulley 8 6B209 Accessory drive belt tensioner pulley Belt Tensioner
Automatic tensioners are calibrated to provide the correct amount of tension to the belt for a given accessory drive system. Unless a spring or damping band within the tensioner assembly breaks, or some other mechanical part of the tensioner fails, there is no need to check the tensioner for correct tension.

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1 Answer

HOW TO PUT A BELT ON A 2002 MERCURY COUGAR


which belt,serpentine you should have a idler tensioner pulley you will have to move to release tension and reroute belt same way you take off.










TIM.

Dec 06, 2010 | 2002 Mercury Cougar

1 Answer

What size is the engine on a 2002 dodge durango R/T? Need to change the surpentine belt.


4.7L or 5.9L and it should be listed on a sticker somewhere in the engine compartment.

---
Drive Belt Removal & Installation 3.7L, & 4.7L Engines To Remove:
dak_97-04_47l_drv_blt.gif

  1. Before servicing the vehicle, refer to the precautions at the beginning of this section.
  2. Disconnect negative battery cable.
  3. Rotate tensioner until it stops.
  4. Remove belt and slowly rotate the tensioner back to its free position.
To Install:
  1. Install new belt and route around all pulleys except idler pulley.
  2. Rotate the tensioner arm until it stops.
  3. Route the belt around the idler pulley and slowly let the tensioner rotate back to its free position.
3.9L, 5.2L, & 5.9L Engines To Remove:
NOTE: Check the belt routing label, located in the engine compartment, for the most current belt routing schematic.
CAUTION
Do not attempt to check tension with a belt tension gauge on vehicles equipped with an automatic belt tensioner.
  1. Before servicing the vehicle, refer to the precautions at the beginning of this section.
  2. Attach a socket wrench to the pulley mounting bolt of the automatic belt tensioner and rotate the tensioner assembly clockwise until tension is relieved.
  3. Remove or disconnect the following:
    • Belt from idler pulley
    • Belt from vehicle
To Install:
  1. Position drive belt over all pulleys except idler pulley.
  2. Attach a socket wrench to automatic belt tensioner and rotate the tensioner assembly clockwise.
  3. Install belt over idler pulley, allow tensioner to rotate back into place, and remove the wrench.
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Sep 03, 2010 | 2002 Dodge Durango

2 Answers

How to put on the main drive belt


Not sure what engine you have so here is both.
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Item Part Number Description 1 10346 Generator 2 6B209 Drive Belt Tensioner 3 3A674 Power Steering Pump 4 19703 A/C Compressor 5 6A312 Crankshaft Pulley 6 6C348 Idler Pulley 7 8501 Water Pump 8 8620 Drive Belt


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Item Part Number Description 1 10346 Generator 2 3A674 Power Steering Pump 3 19703 A/C Compressor 4 6C348 Idler Pulley 5 6B321 Crankshaft Vibration Damper and Pulley 6 8501 Water Pump 7 6B209 Drive Belt Tensioner 8 8620 Drive Belt

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1 Answer

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Engine diagram for 2001 mercury cougar


4 cyl or v 6?

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1 Answer

Serpentine belt diagram for a 5.9 diesel with air and 9 pulleys


5.9L DIESEL
196759.jpg The 5.9L diesel engine accessory drive system (with a/c) consists of :
  1. Generator Pulley (1)
  2. Water Pump Pulley (2)
  3. Idler Pulley (3)
  4. Power Steering Pump Pulley (4)
  5. Radiator Fan Pulley (5)
  6. Crankshaft Pulley (6)
  7. Automatic Tensioner (7)
  8. A/C Compressor Pump Pulley (8)
CAUTION: When installing the accessory drive belt, the belt must be routed correctly. If not, engine may overheat due to water pump rotating in wrong direction. Refer to or for correct engine belt routing. The correct belt with correct length must be used.
1. Position drive belt over all pulleys except water pump pulley. 2. Attach a 1/2 inch ratchet to tensioner.


196757.jpg The 5.9L diesel engine accessory drive system (without a/c) consists of :
  1. Generator Pulley (1)
  2. Water Pump Pulley (2)
  3. Idler Pulley (3)
  4. Power Steering Pump Pulley (4)
  5. Radiator Fan Pulley (5)
  6. Crankshaft Pulley (6)
  7. Automatic Tensioner (7)
3. Rotate ratchet and belt tensioner clockwise. Place belt over water pump pulley. Let tensioner rotate back into place. Remove ratchet. Be sure belt is properly seated on all pulleys.

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