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Old 08-05-2015, 10:20 PM
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How to replace water pump 2003 ram 1500

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Old 12-02-2012, 09:23 PM
bighits4421
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Default How to replace water pump 2003 ram 1500

This is my first post on here just wanted to see how difficult it was to change the water pump on the truck. If there are any special tools that I need outside the normal tool set or anything that's a common mistake. Thanks!
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Old 12-02-2012, 09:27 PM
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on a 4.7 just need a spanner type tool to hold the fan.
probably need a spanner on any engine.
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Old 12-02-2012, 09:52 PM
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Download this
http://apicdn.viglink.com/api/click?....com%2F2fu8oyn
and it will be in there.
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Old 12-05-2012, 12:06 PM
bighits4421
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Thanks yall I appreciate it. Im gonna try and knock it this weekend I'll let yall know how it goes.
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Old 12-05-2012, 12:44 PM
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be sure to mark the bolts. They are almost all the same thread size but different lengths. There's plenty of room to work with the fan removed.
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Old 12-05-2012, 01:19 PM
Izero
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Quote:
Originally Posted by loflyer2 View Post
be sure to mark the bolts. They are almost all the same thread size but different lengths. There's plenty of room to work with the fan removed.

Ziploc bags are the best tool I have when I'm taking things apart... I especially like the sandwich bags with the white space to write on with Marker.
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Old 12-05-2012, 06:58 PM
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Take pics with your mobile to refer back to belt routing etc.
Consider replacing the belt and idler and tensioner pulleys at the same time as doing the water pump.
I did this last month on my 03 Hemi.
Get/rent a fan removal tool. Or make a "red neck spanner" to get it off.
That's the hardest job of the lot in replacing the pump.
After removing the fan, it's plain sailing.
Flush the radiator and the system if you can and replace your coolant with only the OEM HOAT anti-freeze.
BTW....people are correct about the water pump bolts. There's lots of different lengths, so mark them take pics or do whatever necessary to make sure your put them back in the correct places.
Hope this helps?
Al.

Last edited by abarmby; 12-05-2012 at 07:00 PM.
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Old 12-05-2012, 08:30 PM
bighits4421
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Ok ya thanks yall I watched a few quick youtube videos on it too, I think I can manage on it. Should I replace the thermostat too?
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Old 12-05-2012, 08:55 PM
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Not necessary but wouldn't hurt considering you are already into it with coolant drained.
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Old 12-06-2012, 09:17 AM
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What I did to make sure I got the bolts correct.... As I took them off the old water pump I put them in the corisponding holes on the new water pump. Then clean the heads off and with a sharpie write letters on the bolt head and the case where they go, just incase one or two fall out when you manuver the new unit onto the engine.

I purchased the BOSCH unit from pepboys, but the one I got must have been moved around in its mold when they poured the metal for the case, cause I had to shave down the idler pulley mounting surface to get the belt lined up with the other pulleys.

I also, as an extra measure, put a very thin bead of water pump gasket silicone just on the outside of the rubber gasket close to the edge, just to be sure it didnt leak, It doesnt call for it but over the years I have changed several water pumps on previouse vehicals and learned ... It sucks when you get everything buttoned up and find a small leak then have to tear the whole thing apart again.

I also changed the themostat and added a bottle of WaterWetter to the new antifreeze, I sware by the stuff....

Also make sure you check the reservoir the next two heat and cool cycles and top off as needed.

Good luck!
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