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Water pump

 
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richp04impala
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PostPosted: Thu May 31, 2012 10:20 pm    Post subject:  Water pump Reply with quote

If anyone seen my previous post I have been battling with air in my cooling system for some time causing gushing sound when accelerating. I did the LIM gaskets, nothing changed, new radiator cap , countless ways of bleeding, still the same. Car doesn't over heat or smoke out the exhaust and there have been no visual leaks, no coolant in oil and runs good so i doubt its the head gaskets..

So today opened the hood up and was standing in front of the car and I felt little drops of what I suspect to be coolant being flung up at me by the pulleys. I cant really see the leak but it does not look to be coming from the intake or head gaskets..It only leaves the water pump..

So could it be that my water pump leaking has been letting air into the cooling system this whole time? Is that even possible or a separate issue altogether?
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bigsapper
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PostPosted: Fri Jun 01, 2012 2:42 pm    Post subject:   Reply with quote

Possible. I had mine replaced last year.

Never saw a drop of fluid on the ground and it didn't seem I needed to top off my reservoir. But I kept smelling coolant every time I parked the car.
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outonthetiles
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PostPosted: Fri Jun 01, 2012 2:59 pm    Post subject:   Reply with quote

I believe there is a seep hole in the water pump and when the seal/bearings go, you get coolant coming out of it. If you've replaced everything else, why not replace the water pump? Its not a super difficult job..

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richp04impala
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PostPosted: Fri Jun 01, 2012 8:10 pm    Post subject:   Reply with quote

I haven't taken time to really see where the leak is coming from so I have been waiting before i just replace parts hoping for a fix, but I was just curious to see if anyone else had this issue..Im so glad nothing else needs to come off to change the WP though im tired of having this thing apart everyweekend Very Happy
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outonthetiles
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PostPosted: Fri Jun 01, 2012 8:38 pm    Post subject:   Reply with quote

3.4 or 3.8?

On the 3.8 the power steering pump needs to be unbolted to remove the water pump if I recall, but thats 2 bolts and you can leave the lines connected. Also, moving the coolant resivoir out of the way will make things much easier.

Not sure what kind of a job it is on a 3.4 though..

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richp04impala
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PostPosted: Fri Jun 01, 2012 9:29 pm    Post subject:   Reply with quote

mines a 3.4...its cake on the 3.4, its right in the front, just remove the plastic belt routing thing, the belt, 4 bolts to remove the pulley and 5 for the water pump then it just comes right out...Should go for the stock replacement or heavy duty?
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outonthetiles
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PostPosted: Fri Jun 01, 2012 9:37 pm    Post subject:   Reply with quote

Good deal. Hope you get it fixed..

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Frank
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PostPosted: Sat Jun 02, 2012 10:23 pm    Post subject:   Reply with quote

I don't know how different the 3.4 is, but on the 3.8 you can stick your finger inside the water pump pulley and check for moisture without pulling anything off of the car.

Of course you will want the engine off when doing this. Wink

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98ss
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PostPosted: Sun Jun 03, 2012 11:56 am    Post subject:   Reply with quote

The weep hole on the 3.4 h20 pump is on the top, it will dribble down on the pully and it will fling the coolant with the belt. When changing it, just remember to crack the 4 bolts that hold the pully on to the pump while the belt is still on. Pay attention to where the orientation to the weep hole and there is a large tab that doesn't do anything. There is only 1 way the pump will bolt up. I want to say the 5 bolts that hold the pump on are torqued to 6-7 ft lbs.
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richp04impala
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PostPosted: Mon Jun 04, 2012 6:36 pm    Post subject:   Reply with quote

So changed out the water pump and sure enough it was leaking




The only marks on the water pump was an arrow pointing out towards the pulley and nothing that showed where exactly that arrow was suppose to be...I installed the new pump with the arrow visible from the top and I i didn't check to see if it would bolt up any other way but I didn't see anything that would not allow it to, So i hope i got this right...

Anywho I'm pissed been driving around for two days and i still got the damn gushing sounds behind my dash when accelerating
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outonthetiles
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PostPosted: Mon Jun 04, 2012 6:53 pm    Post subject:   Reply with quote

Make sure your heat is cranked when you bleed the coolant..

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PostPosted: Mon Jun 04, 2012 8:07 pm    Post subject:   Reply with quote

yup heat cranked, front of car jacked up so the overflow tank and radiator are highest points, it doesn't seem to be as bad as before so I'm hoping it will bleed itself out with some more driving but im not too optimistic about that
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richp04impala
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PostPosted: Tue Jun 05, 2012 5:35 pm    Post subject:   Reply with quote

Anyone else have any suggestions?? All that is really left is heater core and head gaskets but im not burning any coolant the car has never over heater nor does it ever get hotter than the middle line and do not smell any coolant inside the car when ac or heat is turned on.. Would a compression test show if head gaskets are an issue?
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