water pump 7.3

[Butch Cassidy]

What's the big difference between a 195 degree thermostat and a 203 degree? Im changing out my water pump and happen to notice alot of people say go with the high temp one, any perks to this?

Warmer cab heat, if you really need this that is all as there is no other perks to this.

The question I have to ask you is: does the state you live in do (or about to do) diesel emissions testing? If so beware of the higher tstat - increasing coolant temps will produce and increase in NOx readings - a NO,NO for trying to pass emissions. Been there, done that.

You might be better off just sticking w/ a new oem tstat and housing. I did this and have no leakage or emissions issues to speak of and peace of mind.

Hopes this helps,

Butch Cassidy

 

[dpantazis]

What's the big difference between a 195 degree thermostat and a 203 degree...any perks to this?

the >optimal< temperature for a diesel to run at is closer to 200 degrees.

the 203 get you closer to happy land.

 

[OBS96]

2 or 3 hours. I bought a special tool at NAPA to get the fan cluch off. Made life a whole lot easier. It was about $70. A lot of money, but I'll never have to buy it again. I'm sure I'll be using it again, as I hope to keep this truck a very long time. Good Luck

 

[Toptech]

Might be a good idea to get a new thermostat housing right away. Never seen one removed and reinstalled that didn't leak. They are only thin stamped steel and are usually distorted when you remove them.

Yes, replace the thermostat housing. Mine leaked after replacing my stat also.

 

[drmjf]

I moved this here from the 94'-97' forum since yours is a 02'.

Takes an hour or two.

Here are the instructions for my 96'. Your 02' should be close to the same.

1. Drain the engine cooling system.
2. Remove the upper radiator hose clamps and upper radiator hose.
3. Disconnect the radiator coolant recovery reservoir hose at radiator.
4. Remove the fan and clutch assembly using a Fan Clutch Nut Wrench. Set the fan and clutch assembly in the fan shroud.
5. Remove the fan shroud screws. (2 ea.)
6. Remove the fan shroud, fan and clutch assembly.
7. Loosen the four water pump pulley bolts.
8. Remove the drive belt.
9. Remove the water pump pulley bolts and water pump pulley.
10. Disconnect the engine coolant temperature sensor.
11. Disconnect the heater hose and clamp from the water pump.
12. Remove the water pump inlet bolts and water pump inlet.
13. Remove the water pump bolts. These bolts are different lengths. There are nine bolts and three different lengths. Remember where they go.
14. Remove water pump and water pump housing gasket.
15. Clean gasket surfaces.

Installation
1. Install the water pump and water pump-housing gasket. Put a little grease on the gasket to help hold it in place.
2. Install the water pump bolts, torque to 15 ft/lbs.
3. Install the water pump inlet and bolts, tighten bolts to 15 ft/lbs.
4. Install the heater hose and clamp to the water pump.
5. Connect the engine coolant temperature sensor.
6. Install the water pump pulley and start the water pump pulley bolts.
7. Install the drive belt.
8. Tighten the water pump pulley bolts to 12-18 ft/lbs.
9. Install the fan shroud, and fan and clutch assembly.
10. Install the fan shroud screws
11. Install the fan and clutch assembly.
12.Install the radiator coolant recovery reservoir hose to the radiator.
13. Install the upper radiator hose and clamps.
14. Refill and bleed the engine cooling system.

Everything is right, but instead of grease use halomar gasket sealer. Its better and will not harm the coolant.

 

[howardsvm]

Water pump

Go buy the fan clutch wrench then you can charge other guys beer to borrow it.

 

[smokin'jay]

no more than a couple of hours...worst thing is the fan clutch...the rest is child's play.

 

[xtrahappy]

Can I add my 2 cents.... please... For some reason that "tool" for fan clutch. Didn`t fit on my truck. I had to pull radiator out and pull fan and pump as one unit. Place it in vise to break it loose. Of couse seems as if all my luck is bad luck..

 

[early 99 stroker]

Can I add my 2 cents.... please... For some reason that "tool" for fan clutch. Didn`t fit on my truck. I had to pull radiator out and pull fan and pump as one unit. Place it in vise to break it loose. Of couse seems as if all my luck is bad luck..

i had the same problem..i used a air chisle to loosen the nut....sounded better then pulling the rad..

 

[DaveBen]

Very large Channel Locks works for me.

Dave