Water pump replacement - JeepForum.com

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post #1 of 21 Old 04-29-2013, 02:36 PM Thread Starter
BuzzZJ9er
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Water pump replacement

Saturday I went to change the water pump in my wife's 5.2 and I can't get the fan off. Any ideas? I tried with the belt on and breaker bar adding tension on the tensioner. I can't get the fan to break loose no matter what. I even soaked it in PB blaster all day. Any help would be great as I am itching to get this thing out on the trails.

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post #2 of 21 Old 04-29-2013, 03:09 PM
AVR2
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You need to use a spanner wrench or similar tool through the holes in the pump pulley to hold it steady while you break the nut loose. Some people have reported success jamming a big screwdriver through one of the holes.
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post #3 of 21 Old 04-29-2013, 03:15 PM Thread Starter
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Quote:
Originally Posted by AVR2
You need to use a spanner wrench or similar tool through the holes in the pump pulley to hold it steady while you break the nut loose. Some people have reported success jamming a big screwdriver through one of the holes.
Thanks. Ill look into the screw driver if my stepdad doesn't have a spanner wrench. It's a right or left handed thread?
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post #4 of 21 Old 04-30-2013, 07:16 PM Thread Starter
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Hopefully this will hold the pulley to get the fan off.
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post #5 of 21 Old 05-01-2013, 01:43 AM
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What's a spanner wrench
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post #6 of 21 Old 05-01-2013, 06:28 AM
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Pipe Wrench/ or big adjustable wrench and BFH...couple whacks breaks that nut loose every time...

Oh and make sure the serpentine belt IS ON.

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post #7 of 21 Old 05-01-2013, 08:31 AM
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Quote:
Originally Posted by BuzzZJ9er View Post
It's a right or left handed thread?
It's a right handed thread so "lefty loosey". They make a long thin open ended wrench for this task that slips in there to get on the nut. A few wacks with a hammer and the fan should spin right off.

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post #8 of 21 Old 05-01-2013, 05:49 PM Thread Starter
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Quote:
Originally Posted by tufmar
Pipe Wrench/ or big adjustable wrench and BFH...couple whacks breaks that nut loose every time...

Oh and make sure the serpentine belt IS ON.
I tried this with the belt on and adding extra tension. Wouldn't come off.

My home made tool was a no go. Forgot it had to wrap around the nut. So back to the BP it went and now should be able to get a bolt in two holes to hold it. :fingers crossed:
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post #9 of 21 Old 05-02-2013, 01:39 PM Thread Starter
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Ok so I got the old water pump off today but tab out of time before work.

What is a good way to remove the old gasket? It seems pretty stuck on there.
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post #10 of 21 Old 05-02-2013, 02:05 PM
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Quote:
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What is a good way to remove the old gasket? It seems pretty stuck on there.
Scraper for the big stuff and then finish up with a Roloc pad.
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post #11 of 21 Old 05-02-2013, 03:30 PM Thread Starter
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Originally Posted by HighLonesome

Scraper for the big stuff and then finish up with a Roloc pad.
What's a roloc pad? Like scotch brite? Should I spray the water pump area down with the garden hose to ensure no crud enters the cooling system or would this make it worse? Could use rags but a hose would be faster And easier as I have to refill the rad with water for now anyhow.
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post #12 of 21 Old 05-02-2013, 04:43 PM
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Never ever ever use a scotch bright pad for anything in your engine.... The fibers if they get into the engine will eat it alive quickly.. Use a razor blade..... or a gasket scraper

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post #13 of 21 Old 05-02-2013, 05:10 PM
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what i ended up doing since i was replacing the water pump anyway and didnt care if i damaged it, was i took a huge flat screwdriver and beat it in behind the pulley with a big hammer. this gave me enough friction to break the fan clutch loose without the water pump spinning.

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post #14 of 21 Old 05-02-2013, 05:14 PM Thread Starter
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Quote:
Originally Posted by dnuccio
what i ended up doing since i was replacing the water pump anyway and didnt care if i damaged it, was i took a huge flat screwdriver and beat it in behind the pulley with a big hammer. this gave me enough friction to break the fan clutch loose without the water pump spinning.
So that's the screwdriver trick that someone mentioned. Lol
I ended up making my own tool that hold the pulley by two holes. After that didn't move on me one good whack from my dead low hammer on the wrench and it came off good.
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post #15 of 21 Old 05-07-2013, 11:00 PM Thread Starter
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I got the water pump changed Saturday and took it for a quick spin in the field(15 min) and I started to run a little warm(220) so we shut it down.

When I finished the water pump the rad still looked full so I just filled the reservoir back up. When we parked it for a bit after the test run,we heard a gurgle and the reservoir was almost empty again. Was there air in the system that had to work its way out?

Also the small "tube" that goes in the top right of the pump had some sort of rubberish sealant. I replaced the o-ring that came with the pump but that's it. When I first parked it after the test run the coolant was bubbling up at this "tube". What sort of sealant should I use here? Could this also make it run a little warm?
Sorry such a long post..
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