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Roz 1999 SVT-C
Hard-core CEG'er

Reged: 11/13/02
Posts: 3506
Loc: San jose, Ca
Re: I think my water pump is going out,,,,,,,,, new
#172752 (Re: horseydug) 02/03/03 04:58 PM

Another way to check if it failed is to look inside your radiator cap, and/or use one of those coolant testers to pull a sample out of your radiator.


If you see little black specks, it is mostlikly due to the plastic impeller breaking off.....but even if its the thermostat, i would reconmend doing preventive mantinence,
and changing the water pump for one with a metalimpeller. Even if its not bad.

Roz

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3.0 SVT hybrid...all the fixens...Track/Race ready very soon!!!!!! 20,000 + miles

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Swazo
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Reged: 08/20/02
Posts: 4970
Loc: Land of the watered-down expletives... you fetching fetchers!
Re: I think my water pump is going out,,,,,,,,, new
#173281 (Re: Roz 1999 SVT-C) 02/04/03 12:56 AM

I pulled the whole water pump housing out to scrape all of the old gasket material off (2 gaskets were smashed on!). Everything went together nicely and the tested thermostat (180 degree) went in as well.

The problems I have is when I'm 30 mph and below for extended periods of time. The temperature slowly creeps up just below the red and then I bail for a 45 mph+ street to get it to cool down. After 2 minuets of driving about 45 mph in 4th or 5th gear, it has cooled down long enough for me to do some slow driving for a little bit until it starts to creep up on the red again. (I do a lot of bids for my family hardwood floor business )

I flushed the engine very well a few minuets ago and it still F%&^ing does it! Fuses check out on the fan and the connections look good. So all I can figure is that the relay has gone bad. I could be wrong, because I'm not the best electrician in the world and I'm just guessing!

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2005 Ford F150 SuperCab FX4
1964 Chevrolet Impala SS
1998 CSVT: 354HP/328TQ @ 10 psi, now gone

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Rogerm60
Hard-core CEG'er

Reged: 10/11/02
Posts: 2408
Re: I think my water pump is going out,,,,,,,,, new
#173306 (Re: Swazo) 02/04/03 01:15 AM

Fan problem would definately cause low speed overheating.

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"Those who cannot remember the past are condemned to repeat it" -George Santayana

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horseydugModerator
Hard-core CEG'er

Reged: 03/19/02
Posts: 2319
Loc: Pickering, Ontario, Canada
Re: I think my water pump is going out,,,,,,,,, new
#173516 (Re: Rogerm60) 02/04/03 04:12 AM

Originally posted by Rogerm60:
Fan problem would definately cause low speed overheating.


Agreed, but you would think, in current 32-40 degree ambient in Utah and 30mph free-flowing city street driving, fan should not be required.

Some random order thoughts (due to time constraints):

-A check of hi-speed fan operation, i.e., turn a/c on, would be useful check on the fan motors being ok, but under 50 ambient may not let a/c come on.
-Low speed relay unique so not possible to substitute relay from another position. Fuse 2 60 amp in engine fuse box has been confirmed ok?
-Replacing rad may have interfered with fan wiring.

-With new rad, wp and 'stat coolant flow should be ok, and of course your heater is working ok?
-Engine with timing off can cause overheat, but doesn't appear applicable here.

At the moment I'm stumped, will check back in am.

Edit:
Was the replacement rad new or used? Basic problem seems to be similar to plugged rad/blockage/poor flow in cooling system, i.e., it can't deal with slight increase in engine heat generation. Working fan would deal with symptom but not root cause.
Always a possibility that temp sender is exagerating actual engine temp.

Observing temp rise at idle from cold start probably best starting point. Car in neutral, headlights, blower & rear defrost on, temp should rise to "normal" position of gauge. As car temp rises (usually a 1 letter change on temp needle) lo-speed fan should kick in, reducing temp and causing fan to shut off.


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98 Mystique LS v6 atx 163,000km
97 Contour LX v6 atx 163,000km

Edited by horseydug (02/04/03 12:13 PM)

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Swazo
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Reged: 08/20/02
Posts: 4970
Loc: Land of the watered-down expletives... you fetching fetchers!
Re: I think my water pump is going out,,,,,,,,, new
#174984 (Re: horseydug) 02/05/03 05:36 AM

The radiator was replaced and everything has been fine up until it just started to do it months after the replacement.

My car is going into the body shop tomarrow to wrap up all the loose ends from my new paint job. I'll stick around my car as it warms up just to see if the fan actually turns on (I don't think it does). If it doesn't, I'll replace the relay and go from there as the wiring and connections still look fine.

Hopefully it's just the low speed fan relay and not the fan itself. Even if it is the fan, all that means is itll be replaced by a higher CFM fan anyway.

--------------------
2005 Ford F150 SuperCab FX4
1964 Chevrolet Impala SS
1998 CSVT: 354HP/328TQ @ 10 psi, now gone

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horseydugModerator
Hard-core CEG'er

Reged: 03/19/02
Posts: 2319
Loc: Pickering, Ontario, Canada
Re: I think my water pump is going out,,,,,,,,, new
#175128 (Re: Swazo) 02/05/03 12:16 PM

BTW both fans in parallel and therefore work together. Lo-speed accomplished by dropping resistor in circuit between relay and fan motors. Some Contiques only have one fan.

--------------------
98 Mystique LS v6 atx 163,000km
97 Contour LX v6 atx 163,000km

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Swazo
Hard-core CEG'er

Reged: 08/20/02
Posts: 4970
Loc: Land of the watered-down expletives... you fetching fetchers!
Re: I think my water pump is going out,,,,,,,,, new
#175701 (Re: horseydug) 02/05/03 08:56 PM

Hmmmm
It ( the fan(s) )didn't come on at all even when I switched over to full blast A/C which you could hear kick on.

OK, since they run in parallel would that mean at low speeds both are running and at high speed one is running? Or is it the other way around?

--------------------
2005 Ford F150 SuperCab FX4
1964 Chevrolet Impala SS
1998 CSVT: 354HP/328TQ @ 10 psi, now gone

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horseydugModerator
Hard-core CEG'er

Reged: 03/19/02
Posts: 2319
Loc: Pickering, Ontario, Canada
Re: I think my water pump is going out,,,,,,,,, new
#175733 (Re: Swazo) 02/05/03 09:17 PM

Both off, both low or both high. Plse confirm fuse noted in my prior post is ok.

Edit:
Next step.
If ok then with ignition off pull lo-speed relay and place a towel over battery. Check relay or relay socket for terminals 3 & 5 and place a short jumper wire between these terminals in the relay socket. You will probably get a spark, therefore battery cover as a precaution. Jumper should be 12 gauge or larger.

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98 Mystique LS v6 atx 163,000km
97 Contour LX v6 atx 163,000km

Edited by horseydug (02/05/03 09:41 PM)

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Swazo
Hard-core CEG'er

Reged: 08/20/02
Posts: 4970
Loc: Land of the watered-down expletives... you fetching fetchers!
Re: I think my water pump is going out,,,,,,,,, new
#175981 (Re: horseydug) 02/06/03 12:17 AM

OK, I only did a quick visual inspection because I was in a slight hurry this morning. All looked good, but I'll have to check it right when I pick it up tomarrow night.

2 60 amp fuses? I don't think I saw 60 amp fuses in there to be honest.

--------------------
2005 Ford F150 SuperCab FX4
1964 Chevrolet Impala SS
1998 CSVT: 354HP/328TQ @ 10 psi, now gone

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horseydugModerator
Hard-core CEG'er

Reged: 03/19/02
Posts: 2319
Loc: Pickering, Ontario, Canada
Re: I think my water pump is going out,,,,,,,,, new
#176489 (Re: Swazo) 02/06/03 12:26 PM

Fuse #2, 60 amp is the fan fuse.
I still think you probably have a wiring problem related to rad re % re. I'd double check connectors as well as ground connection from fan motors.

--------------------
98 Mystique LS v6 atx 163,000km
97 Contour LX v6 atx 163,000km

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