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How do you replace the water pump on a 1991 Oldsmobile Cutlass Supreme?
Wiki User
∙ 12y ago
2. Drain coolant...if new save and reuse. If not replace it with premix 50/50 antifreeze. You can mix your own but for convienence use the 50/50.
3. Remove air cleaner (if located in the way), and remove Radiator overflow tank.
4. Remove serpentine belt and tensioner...(rotate tensioner counter clockwise to release belt tension (write down routing of belt before removing)and remove the belt fromthe auxillary components and slowly release the tensioner. On 3.1 and 3.4L engines remove tensioner retaining bolt and detach tensioner assembly from the engine.
5. Remove alternator and its brackets (AC compressor if necessary)
6. Remove small belt guard just above water pump (on 3.1L)
7. Remove water pump mounting bolts (around the perimeter of the pump- approximately 5 of them) and remove the pump. If it is stuck tap with a SOFT-face hammer GENTLY!!!
8. clean fastener threads and any threaded holes in the engine to remove corrosion and sealant. Remove any residual gasket material left on block.
Use Lacquer thinner or acetone to clean the engine and water pump surfaces that will come into contact with each other.
Apply NEW gasket if not attached to H2O pump
Installation is:1. Attach pump and gasket to eng block and start the bolts finger tight Tighten in 1/4 turn increments to torque Torque for 3.1 and 3.4L is 89 in-lbs....THIS IS NOT VERY HARD!!! TIGHTEN WITH SOCKET AND RACHET TILL 1/2 TURN PAST TIGHT!!!!!
2. reinstall all parts you took off to get to this darn thing.
- NOTE*****
This project is best done with at least two friends and a whole lot of your choice of alcoholic beverage. Have Fun!!
Wiki User
∙ 12y ago
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