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If you have a Northstar 4.6, start by purchasing the special removal/installation tool.
1. Drain the cooling system.
2. Remove both radiator hoses
The water pump is on the right hand side of the engine and is driven by a pulley that comes off of one of the overhead cams.
3. remove the air cleaner assembly.
4. remove the pulley guard.
5. loosen the tensioner and take the belt off of the pulley.
If you decide to replace the belt you need to remove the tensioner, remove the studs that the pulley guard came off of and the tensioner will come out.
6. remove the water pump housing cover. the thermostat housing is bolted to this cover. it has (4)10mm bolts that hold it on.
7. using the special tool, turn the water pump clockwise (it twist-locks into the housing) and remove it.
8. clean all sufaces, replace both o-rings.
9. CAREFULLY! install the new pump with the special tool. be careful that you turn it all the way in counter-clockwise but that you don't pull too hard. The pump has steel tabs that lock into grooves in an aluminum housing. if you damage that housing by forcing the pump too hard you will cost yourself a ton of time and money.
10. re-assemble the engine in reverse order as disassembly.
don't forget to use your torque specs. You are working with aluminum castings.
good luck!
Wiki User
∙ 13y ago
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