2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

how 2 test water pump/ t stat

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Old Aug 12, 2009 | 04:16 PM
  #1  
awizzle414's Avatar
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From: florida
Question how 2 test water pump/ t stat

overheating, thought it was radiator, took it out holds water. when it was in all the water would leak out couldn't tell from where tho. the hoses seem fine but am going to replace them anyways. is there a way to check the pump since the radiators already out? milked it home with 4 gallons of water n everytime it was low there'd be a loud intermediate bangin noise, bout two second pause, from the top hose, would that be from the water boilin or the pump workin.
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Old Aug 12, 2009 | 04:56 PM
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From: the dalles
well just replaced my water pump. the one wat to figure out is that there is a small hole under the bottom of the pump and it will leak out water. its called the weeping hole i think. but that will leak. and also the fan will be off its axis while it spins if its bad. but concidering your car is like 20 years old or so theres a chance that its old and wore out.
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Old Aug 12, 2009 | 05:07 PM
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awizzle414's Avatar
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From: florida
know bout the weeping hole but already got the radiator n battery out, can i push water up the hose with a garden hose to test it, n e other tricks
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Old Aug 12, 2009 | 05:15 PM
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From: Mile High
Originally Posted by thejallenator
the one wat to figure out is that there is a small hole under the bottom of the pump and it will leak out water. its called the weeping hole i think. but that will leak. and also the fan will be off its axis while it spins if its bad. but concidering your car is like 20 years old or so theres a chance that its old and wore out.
Not necessarily.
It's possible for the seal to degrade and the bearing begin to fail without the fan acting wonky.
A wobbly fan is a surefire indication that something ain't right but the reverse isn't always true.

Also, cavitation and corrosion can damage the impeller to the point that the pump is moving but a fraction of it's rated capacity...all without fluid escaping the weephole or the fan going wobbly.
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Old Aug 12, 2009 | 05:34 PM
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g14novak's Avatar
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From: Cedar Rapids, IA
Originally Posted by clokker
Not necessarily.
It's possible for the seal to degrade and the bearing begin to fail without the fan acting wonky.
A wobbly fan is a surefire indication that something ain't right but the reverse isn't always true.

Also, cavitation and corrosion can damage the impeller to the point that the pump is moving but a fraction of it's rated capacity...all without fluid escaping the weephole or the fan going wobbly.
Very correct. My car use to run at 250F (and I DD'd it like that too!) for almost a month. No water out the weep hole, no clutch fan hitting the shrowd or anything. I replaced it and ran the car. Stays at 185F now.
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Old Aug 12, 2009 | 10:39 PM
  #6  
awizzle414's Avatar
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From: florida
guess i'm replacin hoses, pump, n t stat, whats with the water leakin n noise in the hose, don't wannna b a parts changer wanna find the prob. works been slow really can't afford all it luckily i got work truck.
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Old Aug 12, 2009 | 10:59 PM
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jjwalker's Avatar
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From: Mesquite, TX-DFW
I can't read what you are saying...so I have no help. I just went through all of this with my 7 but not being able to understand what it is you have typed doesn't allow me to answer your question.
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