Thread: Water pumps

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  1. #1 Water pumps 
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    What’s the part number for the water pump with the updated impeller or an equivalent aftermarket?

    I believe I am in need of a new one and don’t want the old design again
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  2. #2 Re: Water pumps 
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    i asked this back in january
    water pump brand
    and went with the NAPA. iirc, its a gates.

    dont forget the thread sealant and replace the elbows while yer there.
    08 grand prix NA3800
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  3. #3 Re: Water pumps 
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    Thanks. I already have the aluminum elbows in there. Good advice about the thread sealer. I am now thinking this may not be my problem. Seems to be an issue with the engine fans
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  5. #4 Re: Water pumps 
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    what are the symptoms?
    08 grand prix NA3800
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  6. #5 Re: Water pumps 
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    What was happening was with the a/c on the temp would be getting really hot. I would be about halfway maybe a hair over 210 on the highway and on stop & go driving it would raise to about 3/4 of the way getting too close to the red for comfort until I either started going again at a decent speed or shut off the a/c for awhile. I ended up having to pull over one day & noticed only the driver side fan running. The next day the passenger fan was going too, so I ended up playing around with the fan relays & found the one that controls the passenger fan. I replaced it and the fan has been running. My temps are still getting over the halfway marker, but not quite all the way to 3/4. I'm thinking there might be something else as well.

    I have the dhp pcm which turns on the fans at 180* and keeps fans running for 2 mins after shutdown, I have the 180* t-stat and I did a coolant flush a couple months ago. I do have the waterpump underdrive pulley which I am thinking may be a factor especially in this 90*+ weather we've been having.
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  7. #6 Re: Water pumps 
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    Do your fans actually stay on after you shut off the car? I've never been able to get that feature to work on dhp or hptuners.

    Maybe your rad is clogged? I didn't run the stock rad very long after swapping so I don't know what's normal temps. I installed a thicker rad and highest temps I've seen in this heatwave is 190. Dash gauge is usually a little over 1/4, maybe 1/3. Think I paid 40 bucks for the new rad because it had a crack in the plastic that I welded.

    I assume you did the lim gasket and got rid of the dexcrap? You should see what the water passages in my heads looked like when I took them off. Gross. I think I have pics in my car thread. Surprised any coolant got through.
    Top Swapped 01 Imp
    VS (very small?) cam, SD Headers, 2.8" pulley, 29°, ported everything, E85, AEM water/meth, Deka 60's, HPT tuned
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  8. #7 Re: Water pumps 
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    personally i say get a water pump and flush the system before pulling the pump( flush the heater core with low pressure while there). i spent about 2 hours flushing my '08 before doing the water pump. PO was running dexcool ( or never changed it)and system was pretty nasty. new water pump,tstat,hoses, then burp the system. now temp gage will go just a wee bit above half-even in metro detroit traffic- but no more.
    08 grand prix NA3800
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  9. #8 Re: Water pumps 
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    Yes bandook, my fans do stay on for about a minute or so after I shut off the car with the DHP. I did my intake gaskets somewhere around 90-95k miles. I am currently sitting just shy of 160k. I am still running that dexcrap, however I just flushed the system & put in fresh mixed 50/50 with distilled water. I usually flush the coolant either once a year or once every other year.

    My issue actually ended up being the engine fan harness. The passenger side fan had a loose connection so only 1 fan was running. So far after making repairs both fans have been running and the temp has been staying nice & low even with the ac on
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