Question about 2004 Mazda MPV

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Water pump bearing froze. Belt melted on road to

Water pump bearing froze. Belt melted on road to nowhere. Hauled in and new water pump installed. Specified belt to loose, the belt tensioner was missing. No part there, but there never seemed to be a part on the boss for a tensioner pulley. Bolt threads were clean with no evidence of a bolt. Mechanic installed a short belt on a new water pump and 500 miles with no problem. Where is the missing belt tensioner part?

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GoeffreyH is not correct. On this engine the water pump is run by a small, single, separate belt which cannot be adjusted by the alternator because it (and the water pump itself) are on the opposite end of the engine from the crank pulley and other accessories, such as alternator, A/C, etc. which are driven by the main serpentine belt. The water pump is driven by a pulley on the end of one camshaft. Your confusion stems from the change from the old system, in which a longer belt was used with a tensioner in the traditional fashion, and the new system on 2004 vans where the tensioner was eliminated and a 'stretch fit' belt was used. Stretch fit belts have a springy component (like a rubber band) and keep their own tension this way by being stretched a bit to fit over the pulleys then holding snug against them. The problem is that some parts books erroneously call for the old belt for vans which need the new one. So the first belt your mechanic got was longer (to fit over the extra tensioner pulley) and static (not stretchy). On these newer vans, you can still see the mounting boss where the tensioner would have gone, it's part of the castings so it's still there. That's why it looks like there's a place for a tensioner but like none was ever there. Both your observations are correct. The only thing you need to do now is make sure your new belt is the right one, that it's a stretch fit belt, so it maintains tension (otherwise the water pump pulley will eventually start to slip and spin too slowly and the van will overheat) and also that it's not TOO tight, which will put you out of another water pump. The correct belt, if it's from NAPA, would be 030250SF.

Posted on Aug 22, 2010

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He used the alternator to tension the belt,this is correct,in some markets,mazda use a double belt system and it is on these that a tensioner is used.lookm at the crank pulley,it has space for 2x belts.

Posted on Jul 12, 2010

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3 Answers

My Mazda 323F (Protege in the US) 1.8 2000 had a squeaky belt for months then one night changed to a whirring - almost grinding noise - then a few miles later the engine cut out and won't start. No signal...


Water pump bearing faulty is first thought. How about faulty alternator/battery? you didn't mention any check engine lights that were on. Alternator bearings can fail, creating a no-charge situation that will run your battery dead, creating a "no power to injectors and no start situation"... if your waterpump is locked up, it can keep your belt from operating other accessories. Waterpump first choice.

Dec 15, 2013 | Cars & Trucks

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Water pump locked, belt broke when car parked (melted on hot wp pulley. now tensioner is locked = can move to take tension off to install new belt. Why would it lock-up?


for a water pump to lock ( seize) it would have had bearing failure in the pump. that will require a new water pump. It is possible of obstruction in the impellor section but this would be unlikely. When water pump bearins fail you will normally hear a low tinny metal growl at low rpm long before seizure occurs

Jan 06, 2013 | Cars & Trucks

1 Answer

Replace water pump torrent


drain coolant until below water pump level. loosen water pump pulley bolts.then remove drive belt by rotating belt tensioner.remove drive belt from the right of idler pulley.carefully release the drive belt tensioner spring tension.then remove water pump pulley bolts and pulley.remove water pump bolts and water pump pay attention to the position old water pump when removing water pump so you can line up new water pump holes to the engine. be sure clean engine water pump mounting surface use gasket remover dont scratch engine surface when cleaning removing old gasket material. take new water pump gasket get it mounting holes line up with new water pump mounting holes.when done getting engine water pump surface clean.water pump gasket paper you need to put thin layer of sealer on both sides of water pump gasket use RTV SILICONE.LET SET UP 10 MINUTES. PUT GASKET ON WATER PUMP BUT FIRST MAKE SURE LINE UP GASKET HOLES WITH WATER PUMP HOLES BEFORE PUTTING ON THE GASKET SEALER.when gasket sealer set up 10 minutes then install new water pump with gasket to the engine torque to 89 inch lbs.or 10 NM that is about 7 ft lbs torque.you should be able turn water pump by hand if you cant turn water pump by hand got too tight damage water pump shaft bearing.when all done wait for THREE HOURS. before adding coolant i let RTV CURE SOME. torque water pump pulley bolts 18 ft lbs.

Dec 28, 2012 | 2006 Pontiac Torrent

2 Answers

I have no clue on how to replace water pump on a 1995 chrysler cirrus 2.5L. I have to do this myself I dont have the money for a garage.


This is found on the autozone.com website.

2.5L Engine
See Figures 3 through 7
  1. Disconnect the negative battery cable.
  2. Place a large drain pan under the radiator drain plug. Drain and properly contain the engine coolant.

This procedure requires removing the engine timing belt and the auto tensioner. To help assure proper alignment at assembly, it may be helpful to set the engine at TDC on No. 1 compression stroke. This should align all timing marks on the crankshaft sprocket and both camshaft sprockets.
  1. Remove the accessory drive belts and crankshaft damper.
  2. Remove the right engine mount. This requires safely supporting the engine with a floor jack and wood block so the mount can be removed.
  3. Remove the timing belt covers.
  4. Remove the timing belt and tensioner.



0900c152800896a7.jpg enlarge_icon.gifenlarge_tooltip.gif

Fig. Fig. 3: Remove the water pump mounting bolts


0900c152800896a8.jpg enlarge_icon.gifenlarge_tooltip.gif

Fig. Fig. 4: Pull the water pump assembly off of the engine and inlet pipe


0900c152800896a9.jpg enlarge_icon.gifenlarge_tooltip.gif

Fig. Fig. 5: Open the water pump housing and examine for cracks or damage


0900c152800896aa.jpg enlarge_icon.gifenlarge_tooltip.gif

Fig. Fig. 6: Replace the water pump housing gasket using a scraper tool


0900c152800896ab.jpg enlarge_icon.gifenlarge_tooltip.gif

Fig. Fig. 7: Always keep the water pump's mounting bolts lined up with their correct mounting holes

  1. Remove the water pump mounting bolts.
  2. Separate the water pump from the water inlet pipe and remove the pump.

To install:
  1. Thoroughly clean all sealing surfaces. Inspect the pump for damage or cracks, signs of coolant leakage at the vent, and excessive looseness or rough turning bearings. Any problems require a new pump.
  2. Install a new O-ring on the water inlet pipe. Wet the O-ring with water to make installation easier. DO NOT use oil or grease on the O-ring.
  3. Install a new gasket on the water pump and fit the pump inlet opening over the water pipe. Press the assembly together to force the pipe into the water pump.
  4. Install the water pump-to-engine bolts and tighten to 20 ft. lbs. (27 Nm).
  5. Install the timing belt and timing belt tensioner. Set the timing belt tension.
  6. Install the timing belt covers. Install the right engine mount. Remove the floor jack and engine block from underneath the engine.
  7. Install the crankshaft damper.
  8. Install the accessory drive belts and set to the proper tension.
  9. Connect the negative battery cable.
  10. Fill and bleed the engine cooling system.
  11. Start the engine and verify proper operation, with no leaks

Aug 20, 2011 | 1995 Chrysler Cirrus

1 Answer

My 2001 cadillac deville is overheating the first time it done my water pump tensner pulley wheel broke why did that happen could my water pump have frozen up or something. i had a pressure test done on it...


either the bearing in the water pump froze up, or the bearing in the tensioner froze, this can also cause the serpentine belt to be thrown off of the pulleys.

Apr 18, 2011 | 2001 Cadillac DeVille

1 Answer

2001 Mitsubishi Diamante water pump location


  1. Disconnect the negative battery cable.
  2. Drain the engine coolant.
  3. Remove or disconnect the following:

    Timing belt Alternator brace from the water pump Timing belt rear cover Water pump mounting bolts Water pump, gasket and O-ring

To install:
  1. Install or connect the following:

    New O-ring on the water inlet pipe. Coat the O-ring with water or coolant. Do not allow oil or other grease to contact the O-ring. Water pump to the engine block, with new gasket. Torque the mounting bolts to 10 ft. lbs. (13 Nm) Alternator brace on the water pump. Torque the brace pivot bolt to 17 ft. lbs. (24 Nm). Timing belt rear cover Timing belt Remaining components
  2. Refill the engine with coolant.
  3. Connect the negative battery cable, start the engine and check for leaks.

Hope this gets you back on the road.

Dec 04, 2010 | 2001 Mitsubishi Diamante

1 Answer

How do you replace a water pump in a 2.5L V-6? Step by step.


2.5L Engine

  1. Disconnect the negative battery cable.
  2. Place a large drain pan under the radiator drain plug. Drain and properly
    contain the engine coolant.
    NOTE: This procedure requires removing the engine timing belt
    and the auto tensioner. To help assure proper alignment at assembly, it may be
    helpful to set the engine at TDC on No. 1 compression stroke. This should align
    all timing marks on the crankshaft sprocket and both camshaft sprockets.



  3. Remove the accessory drive belts and crankshaft damper.
  4. Remove the right engine mount. This requires safely supporting the engine
    with a floor jack and wood block so the mount can be removed.
  5. Remove the timing belt covers.
  6. Remove the timing belt and tensioner.





    Fig. 3: Remove the water pump mounting bolts
    90903p54.jpg






    Fig. 4: Pull the water pump assembly off of the engine and
    inlet pipe
    90903p55.jpg






    Fig. 5: Open the water pump housing and examine for cracks or
    damage
    90903p56.jpg






    Fig. 6: Replace the water pump housing gasket using a scraper
    tool
    90903p57.jpg






    Fig. 7: Always keep the water pump's mounting bolts lined up
    with their correct mounting holes
    90903p58.jpg



  7. Remove the water pump mounting bolts.
  8. Separate the water pump from the water inlet pipe and remove the pump.
    To install:

  9. Thoroughly clean all sealing surfaces. Inspect the pump for damage or
    cracks, signs of coolant leakage at the vent, and excessive looseness or rough
    turning bearings. Any problems require a new pump.
  10. Install a new O-ring on the water inlet pipe. Wet the O-ring with water to
    make installation easier. DO NOT use oil or grease on the O-ring.
  11. Install a new gasket on the water pump and fit the pump inlet opening over
    the water pipe. Press the assembly together to force the pipe into the water
    pump.
  12. Install the water pump-to-engine bolts and tighten to 20 ft. lbs. (27 Nm).
  13. Install the timing belt and timing belt tensioner. Set the timing belt
    tension.
  14. Install the timing belt covers. Install the right engine mount. Remove the
    floor jack and engine block from underneath the engine.
  15. Install the crankshaft damper.
  16. Install the accessory drive belts and set to the proper tension.
  17. Connect the negative battery cable.
  18. Fill and bleed the engine cooling system.
  19. Start the engine and verify proper operation, with no leaks.


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Oct 29, 2010 | 1996 Dodge Avenger

1 Answer

My water pump burst on the road. the engine still starts but there is a spinning noise. Will I also have to replace the timing belt also?


Replace that water pump right away. I don't see why you'd need to replace the timing belt, unless you're saying "burst" as in, "It blew the gasket to horror and back". Just to be certain, pull out your dipstick. If it looks milky, drain your oil, and replace it. If not, get your new water pump, the spinning, IMHO, is most likely the bearing in the water pump just died.

Oct 01, 2010 | 1998 Dodge Neon

1 Answer

Is the 2002 Buick Rendevous 3.4L CXL water pump driven by the timing belt?


no, it runs on the serpentine belt:



3.4L Engine

  1. Before servicing the vehicle, refer to the Precautions Section.
  2. Drain the coolant from the engine.
  3. Remove or disconnect the following:

    Negative battery cable Serpentine drive belt guard Loosen the water pump pulley bolts Serpentine drive belt Water pump pulley Water pump Water pump gasket

To install:
  1. Clean the gasket mounting surfaces.
  2. Install or connect the following:

    Gasket Water pump. Torque the bolts to 89 inch lbs. (10 Nm). Water pump pulley and hand-tighten the bolts at this time Serpentine drive belt Water pump pulley bolts to 18 ft. lbs. (25 Nm) Serpentine drive belt guard
  3. Fill the cooling system.
  4. Start the engine and check for leaks, repair if necessary.
  5. Road test the vehicle and verify there is no air in the cooling system.

Sep 29, 2010 | 2002 Buick Rendezvous

1 Answer

How do i change the water pump on a 1999 2.5 v6 chrysler sebring?


Hello,

Removal:
Drain cooling system, remove the timing belt if necessary. Remove water pump mounting bolts. Separate water pump from water inlet pipe and remove.

Inspection:
Replace water pump if it has damage or cracks to pump body. Check the shaft seal for any leaks as evidence by traces of coolant from vent hole. Check for any impeller rubbing inside pump, and for loose or rough bearings.

Installation:
Clean all gasket and "O" ring surfaces. Install NEW "O" ring on water pipe (wet "O" ring with water to aid assembly). DO NOT allow oil or grease to contact "O" ring. Install NEW gasket on water pump, and install pump inlet opening over water pipe. Install pump-to-block bolts and tighten to specification 18 FT. Lbs. (25n.m). To complete installation, reverse removal procedure.

Hope this helps :)

Oct 19, 2009 | 1998 Chrysler Sebring

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