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Re: how to loosen the serpentine belt
If you look at the spring tensioner on the belt, there is a 3/8 square hole in the support arm.
Use a ratchet wrench, or breaker bar in the hole, and release the tension. Once it's loose, you can remove the belt.
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Before servicing the vehicle, refer to the Precautions Section.
Drain the coolant from the engine.
Remove or disconnect the following:
Negative battery cableSerpentine drive belt guardLoosen the water pump pulley boltsSerpentine drive beltWater pump pulleyWater pumpWater pump gasket
Clean the gasket mounting surfaces.
Install or connect the following:
GasketWater pump. Torque the bolts to 89 inch lbs. (10 Nm).Water pump pulley and hand-tighten the bolts at this timeSerpentine drive beltWater pump pulley bolts to 18 ft. lbs. (25 Nm)Serpentine drive belt guard
Fill the cooling system.
Start the engine and check for leaks, repair if necessary.
Road test the vehicle and verify there is no air in the cooling system.
Looking at belt routing below, the water pump is the pulley all the way to the right, will have 4 10mm bolt's holding the water pump pulley, loosen 4 small bolt's on water pump pulley, remove serpentine belt, remove small water pump pulley bolt's all the way off, remove pulley, now you can see water pump, remove small 8mm bolt's from water pump, now water pump will come right off, hope this was very helpful.
1. Drain the cooling system until the coolant is below the level of the water pump. 2. Remove the drive belt guard. 3. Loosen the water pump pulley bolts. 4. Remove the drive belt. 5. Remove the water pump pulley bolts. 6. Remove the water pump pulley. 7. Remove the water pump bolts. 8. Remove the water pump. 9. Remove the water pump gasket. 10. Clean the water pump mating surfaces. Installation Procedure 1. Install the water pump gasket. 2. Install the water pump Notice: Refer to Fastener Notice in Service Precautions. 3. Install the water pump bolts. Tighten the bolts to 10 Nm (89 inch lbs.). 4. Install the water pump pulley. 5. Install the water pump pulley bolts. 6. Install the drive belt. Tighten the water pump pulley bolts to 25 Nm (18 inch lbs.). 7. Install the drive belt guard. 8. Fill the cooling system Visit my Blog here
Just to clarify i asked what size motor was in his car. The reason for that statement that removing the timing cover ,chain and exhaust wasent required to change the water pump is that on 3.4 V6 engines none of that is required. To change the water pump in my car ( 99 grand am gt 3.4L) all you need to do is remove serpentine belt, remove the 4 bolts holding on the water pump pulley, then remove the 5 water pump retaining bolts and it out. Then you just need t remove any traces of the old gasket clean the surface put a new gasket on following it with the new water pump torque the 5 retaining bolts , water pump pulley torque its 4 bolts put the serpentine belt back on fill and bleed the coolant system and your done. All the work done easily from the top of the motor without any special tools. It took me a hour and a half. So there is a huge difference in changing water pumps on a 4 cylinder engine and a 6 cylinder engine this is why I asked what engine he had in his car.
Hope the following will help. 1) Drain the radiator. 2) Loosen the 4 bolts on the water pump pulley. You will remove the pulley and install it on the new pump. Just loosen the bolts 1/4" turn with the belt still on, this will prevent the pulley from turning. 3) Remove serpentine belt. 4) Remove 4 bolts and the pulley and set aside. 5) Remove two power steering pump bolts (15mm). You must do this because one of the bolts for the water pump is behind the PS pulley, and you can�t remove it without moving the PS pump out of the way. The bolts on the PS pump are in the 12 o�clock and 6 o�clock position. There is a large access hole in the PS pump pulley. Just line it up, slip in a long socket and remove them. Let the PS pump rest on the oil filter housing. 6) Remove water pump. There are 4 large bolts (15mm) and 4 small bolts (3/8") on the water pump. After the bolts are all out, I placed a length of pipe on the water pump and gave it a couple taps with a hammer and it popped right off. 7) Remove old gasket. The tool of choice IMO is a razor blade like you�d use to remove a winshield inspection sticker. Be careful not to score the mating surface. Remove old gasket and dry off surface. 8) Seat the new gasket and water pump in place, install all the bolts. 9) Reinstall the PS pump and torque bolts. 10) Install pulley on water pump and torque. 11) Install serpentine belt. 12) Re-torque bolts on water pump pulley if needed.
the 4.0 didn't come with a spring type tensioner if look under the p/s pump there is a jack bolt hooked to a idler pully loosen nut on front of pully and lossen up the jack bolt till you can get the belt off
with the serpentine belt still on,loosen the 3 bolts holding water pump pulley on.remove serpentine belt.remove the 3 bolts and take off the pulley.If you want,you can remove the alternator for easier access to pump.loosen the 4 bolts on pump and allow coolant/water to drain from engine.remove bolts ,remove water pump,clean gasket off engine block.install pump etc.in reverse order.install 50-50 mix of dex-cool coolant(coolant and water mix).run vehicle with radiator cap off to remove air bubbles from system.install radiator cap,top off recover bottle.