Written by: Mike Ervin
following steps are needed for removal and installation of the water pump.
Note: I am using my 85 C10 as an example,
yours may differ slightly.
- Remove the positive battery cable at the
- Drain the radiator. Don't forget to
tighten the petcock when done.
- Remove the top radiator hose. Now
remove the fan first and then the fan shroud.
- Loosen the A.I.R. pump so you can remove
the drive belt.
- You will need to remove the alternator
and alternator bracket from the engine. The bracket has the negative battery cable,
the A.I.R. pipe, AC hose bracket and deceleration valve mounted to it also.
- Loosen the AC compressor and remove the
- You will need to remove the power
steering pump from the engine as well, as it mounts to the pump.
- Lay the water pump pulley aside.
Remove the lower radiator hose. Now finally you can remove the pump.
That wasn't too hard now was it? I
have found the worst part about this job is all of the junk mounted on the front of the
engine. Make sure you draw a diagram on where everything goes or you will have all
your hair pulled out trying to figure it out. The power steering pump is the
worst. Clean all the left over gasket from the engine where the pumps mounts.
- On all the pumps I have swapped, I had to
remove the studs for the fan and install them in the new pump. This isn't hard, just
use two nuts and back them out. Install them the same way. I prefer to use
Locktite on the threads where they go into the pump.
- Depending on where your heater hoses
mount, you may have to install a 1/2" pipe plug in the pump instead of a hose
nipple. Whatever goes there, use some teflon tape to seal the threads.
- Use some gasket cement to glue the
gaskets to the pump only. You won't need it on the block.
- Before installing the pump bolts, put
some silicone RTV on the bolt threads. You won't need it on all of them, as only one
goes into water. I use it on all of them anyway.
- Install the pump and torque the pump
bolts to 30 ft lb on all V-6 and V-8's.
- Put the lower radiator hose back on.
- Install the pulley on the pump so you can
install all the belts. It is a lot easier to do now before the fan and shroud are
installed. You can use some washers on the studs so it will tighten.
- Install the power steering pump, you did
make a drawing didn't you? Put the belt on and adjust it.
- Put the AC belt on and adjust.
- Install the alternator and adjust the
belt. Don't forget to hook up the wires. Fasten the negative battery cable,
the A.I.R. pipe, AC hose bracket and the deceleration valve to the alternator bracket.
- Put the A.I.R. belt back on and adjust.
- Remove the nuts holding the pulley
on. Install the fan shroud and then the fan. Make sure the fan nuts or bolts
- Now would be a good time to change the
thermostat if needed. It would be a good safety measure anyway. Put the top
radiator hose back on.
- Fill the radiator and hook the positive
battery cable up.
Have water on hand to finish filling the
radiator as it needs it. Start the engine and immediately check for any leaks.
Add water or antifreeze when needed. Check the temp gauge to make sure it doesn't
overheat. If no leaks and everything else seems ok, you're done. Keep a check
on things for a few days, as in leaks developing.