Screaming coolant pump

**efusco** · 10-29-2005, 02:57 PM

Dad gum it, I remember distinct coolant pump noise in the past, I think I still hear it, but now I'm paranoid that there's a problem even if there isn't one. Guess I'll have to keep a close ear.

SDiego · 10-30-2005, 11:47 AM

Mine does not make any more noise than it used to, except I do hear
like there is bits of sand in it now. Mine never had the sand sound even. It started when I let the car sit a week at the airport, now I hear the sand sound. Its been the same for about two months now. I have the extended warranty, so I will keep a ear, eye on it

I am glad the toyota dealer is only two blocks away from where I work. Mine is
a 04-05 production car. I almost have 8,600 miles on it.

Frank Hudon · 10-30-2005, 12:59 PM

Quote:

Originally posted by efusco@Oct 29 2005, 10:57 AM
Dad gum it, I remember distinct coolant pump noise in the past, I think I still hear it, but now I'm paranoid that there's a problem even if there isn't one. Guess I'll have to keep a close ear.

[snapback]147241[/snapback]

Evan you have that scan tool don't you? if so just watch the engine temp on start up if it rises before the ICE starts the pump is working.

**efusco** · 10-30-2005, 01:11 PM

Quote:

Originally posted by Frank Hudon@Oct 30 2005, 11:59 AM
Evan you have that scan tool don't you? if so just watch the engine temp on start up if it rises before the ICE starts the pump is working.

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Yea, I have, and it seems to show a rise in temp, but the tool is a little odd in that when you turn it on initially it flashes 2 different temps quickly back and forth. No idea what that means. Once I start going and the temp starts to rise it settles into one temp.

Honestly, I think the pump is working fine and I'm just being paranoid...but I'm at 33,500 so I'm freaking out about every little thing that might/could go wrong before the 36k mark... Never mind that I have the extended warranty, my paranoia doesn't secumb to logic!

DaveinOlyWA · 10-30-2005, 01:29 PM

Evan i feel your pain...

but POSITIVE THOUGHTS!!

dont underestimate the power of positive (or negative!~!) thinking

i kinda wonder about the timing of the pump... what controls it?

i have noticed that sometimes, the pump runs almost immediately after i turn the Prius off and other times, it takes as long as a minute before it does anything.

to be honest with ya, i hadnt thought much about it until i read this post so dont really recall a lot of the details between either scenarios

**edit**

i have just realized that i have not changed my coolent yet since ive had the car... what is the replacement cycle on this?

htmlspinnr · 10-30-2005, 02:36 PM

Quote:

Originally posted by DaveinOlyWA@Oct 30 2005, 11:29 AM
i have just realized that i have not changed my coolent yet since ive had the car... what is the replacement cycle on this?

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100k mile initial interval, then 50k mile thereafter when using Toyota SLLC (pink). If any other coolant is used, it changes the interval.

DaveinOlyWA · 10-30-2005, 02:45 PM

oh!!

well then... i knew i wasnt worried about it for some reason. thanks for the info. anything on the timing of when the coolent pump actually works after shutdown??

DanMan32 · 11-02-2005, 02:21 PM

I am sure a DTC would be set if the pump failed.

Frank Hudon · 11-02-2005, 02:49 PM

Quote:

Originally posted by DaveinOlyWA@Oct 30 2005, 11:45 AM
anything on the timing of when the coolent pump actually works after shutdown??

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anytime up to 5 hours after shutdown the pump can run. Normally it's just when you shut it off, when it refills the thermous if the conditions are right, but can selftest the system anytime within 5 hours of shutdown. This from the NCF manual.

skew · 11-02-2005, 03:33 PM

My pump has started making a loud whinning noise lately its a late 04 model. Im going to have it checked when I get the recall notice done @ 10,000 miles Im sad to see problems already

10-30-2005, 11:47 AM	#12
SDiego Join Date: May 2005 Location: San Diego, Ca. Posts: 57 My Car: Package: Nominated 0 Times in 0 Posts TOTM Awards: 0 Friends: 0	Mine does not make any more noise than it used to, except I do hear like there is bits of sand in it now. Mine never had the sand sound even. It started when I let the car sit a week at the airport, now I hear the sand sound. Its been the same for about two months now. I have the extended warranty, so I will keep a ear, eye on it I am glad the toyota dealer is only two blocks away from where I work. Mine is a 04-05 production car. I almost have 8,600 miles on it. __________________ 04-2005 White Prius, pkg#6 with Nav, San Diego, Ca. TiJuana, Mex.

10-30-2005, 01:29 PM	#15
DaveinOlyWA Opps !! I Did it Again!! Join Date: Apr 2004 Location: South Puget Sound, WA Posts: 9,529 My Car: 2006 Prius Package: #4 Nominated 0 Times in 0 Posts TOTM Awards: 0 Friends: 4	Evan i feel your pain... but POSITIVE THOUGHTS!! dont underestimate the power of positive (or negative!~!) thinking i kinda wonder about the timing of the pump... what controls it? i have noticed that sometimes, the pump runs almost immediately after i turn the Prius off and other times, it takes as long as a minute before it does anything. to be honest with ya, i hadnt thought much about it until i read this post so dont really recall a lot of the details between either scenarios edit i have just realized that i have not changed my coolent yet since ive had the car... what is the replacement cycle on this? __________________ My 2006: Last tank 463.1 miles @49.2 pump (49.4 computer) 4.22 cpm winter mpg 50.70 summer mpg 54.59 lifetime: 33,038.3 miles 52.79 mpg pump (54.04 mpg computer) 5.74 cpm My 2007 Zenn Driven 5849 miles, 2.00 cpm/ 105 mpg (at $2.05/gal), 4.04 miles/ Kwh Savings over my Prius $300.79 The Corolla...567.79 The REAL SAVINGS from not driving Corolla 657.39 +Prius= 958.18 (excludes maintenance costs...would be unfair to ICE vehicles) My Plate: DUALPWR (Dual Power)

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10-29-2005, 02:57 PM	#11
efusco Troll Slayer Join Date: Nov 2003 Location: Nixa, MO Posts: 14,046 My Car: 2004 Prius Package: #9 Nominated 1 Time in 1 Post TOTM Awards: 0 Friends: 23	Dad gum it, I remember distinct coolant pump noise in the past, I think I still hear it, but now I'm paranoid that there's a problem even if there isn't one. Guess I'll have to keep a close ear.

10-30-2005, 02:45 PM	#17
DaveinOlyWA Opps !! I Did it Again!! Join Date: Apr 2004 Location: South Puget Sound, WA Posts: 9,529 My Car: 2006 Prius Package: #4 Nominated 0 Times in 0 Posts TOTM Awards: 0 Friends: 4	oh!! well then... i knew i wasnt worried about it for some reason. thanks for the info. anything on the timing of when the coolent pump actually works after shutdown??

11-02-2005, 02:21 PM	#18
DanMan32 Join Date: Aug 2004 Location: Tampa Bay, FL Posts: 3,775 My Car: Package: Nominated 0 Times in 0 Posts TOTM Awards: 0 Friends: 0	I am sure a DTC would be set if the pump failed.

11-02-2005, 03:33 PM	#20
skew Member Join Date: Jul 2004 Posts: 70 My Car: Package: Nominated 0 Times in 0 Posts TOTM Awards: 0 Friends: 0	My pump has started making a loud whinning noise lately its a late 04 model. Im going to have it checked when I get the recall notice done @ 10,000 miles Im sad to see problems already