Recently replaced alternater, serpentine belt, and then the water pump blew. It was driven a short distance, and the pump was replaced. Upon driving after that, when the brakes are applied, the service engine light comes on, and then goes off after about 30 seconds. When the car is started, the engine races and won't idle down.
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Re: 1993 Buick LeSabre idles too fast
I would Look For A Vacuum Leak, Given the Fact that ALL that Work was Done in a SHORT Amount of Time, And The Brakes ARE VACUUM ASSISTED, that when Brakes are applied the ENG. Light Comes on, Seems to Me It all May be related. It does not take Much to Pop A Vacuum line OFF Accidentally
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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.
Loosen and remove the Alternator belt which may be a serpentine belt and see if the whining goes away. It could be the alternator or the water pump if it's driven by the same belt. It will go away while moving because the engine noise is usually negated by road noise etc but it's probably still there.
Here's a link to a web site to give you a diagram for your serpentine. Just insert the year,make,model, and engine size. Once there, you will see to the left a link below the part number called "Routing diagram". Best of luck on your repair. Greg
3.8 engine you drain out coolant.remove serpentine belt and coolant hoses from water pump .then you remove pulley bolts then water pump bolts. then clean gasket surface be careful dont scratch the surfaces up.put in new pump. toque it to 29 ft the long bolts.torque .97 inch pound for short bolts.
first disconnect the battery then check how the serpentine belt is lined up so u can take it off and put back on. Then the pump should be on the side of the motor with 9or12 bolts there could be more! after taking out take razorblad and skrap the old gasket clean wipe of then put new gasket and pump back on dont over tighten the screws cuase the pump my be aluminum.