Change water pump on 99 Frontier - Nissan Frontier Forum
 
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#1 (permalink) Old 11-23-2008, 10:25 PM
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Change water pump on 99 Frontier

I am trying to change the water pump on my 99 Nissan Frontier 2WD 4 Cylinder. The water pump has completeyl failed.

I ahve the new water pump in hand but I can seem to get the pulley and fan clutch assembly removed from the water pump so I can actually remove the water pump. I only have the generic Frontier/Pathfinder Haynes manual and it skips over the steps.

I have the fan off the clutch and the 4 nuts that I thought were holding the fan clutch and pulley to the water pump removed. Unfortunately the pulley and clutch won't come off at all.

Appreciate any thoughts.
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#2 (permalink) Old 11-23-2008, 10:57 PM
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Go get a pully puller tool.. like $15 at your local parts shop


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#3 (permalink) Old 11-23-2008, 11:11 PM
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Thanks for the tip. Unfortunately if I can't get the fan clutch off, I wouldn't be able to use the puller. Looking at the replacement water pump. The water pump shaft has a flat disk with 4 studs that hold the pulley and clutch in place. I have completrly removed the studs. I can pry on that till I am blue in the face the pulley and clutch aren't going any where.
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#4 (permalink) Old 11-23-2008, 11:17 PM
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hmm
On my VG30, the fan and clutch are attached to the water pump pully with the aftermentioned 4 studs. I just simply undid the 4 nuts, and the fan practically fell off. after that the water pump pully was just sitting loose on the studs (the fan clutch held the pully in place essentially), and was very easy to remove.

Maybe just hit the whole area with PB blaster?

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#5 (permalink) Old 11-23-2008, 11:34 PM
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Or lightly tap on it a few times? Is it maybe a little caroded on there?


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01 XE King Cab, V6, 4X4, 5 Speed
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#6 (permalink) Old 11-24-2008, 08:26 AM
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I tapped on it more than a few times. unfortunately no luck. Even tried using a crow bar but couldn't get it to let go. The bearings on the water pump are so bad that the whole assembly just wobbles around but with the pulley in the way, I can't get to the nuts that hold the water pump in place.
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#7 (permalink) Old 11-24-2008, 12:28 PM
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I'd give it a shot of PB Blaster, Liquid Wrench or other brand of penetrating oil and let it sit for a few hours, then see if it comes apart. It sounds as if the components are corroded together. Good luck to you.

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#8 (permalink) Old 11-24-2008, 12:32 PM
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Maybe heat it up with a torch and see if she'll break loose?


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#9 (permalink) Old 11-24-2008, 01:03 PM
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I squirted it copiously with PB Blaster last night although it is tough to get the PBBaser inside of the pulley where it seem to be caught up. I will give it another shot tonight.

One thing that would help is confirmation ofhow the fan clutch and pulley are attached to the water pump. I may stop by the dealer later today.
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