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Old Oct 5, 2009 | 11:53 AM
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Default water pump?

i've got this rattling noise under the hood. that sounds like its coming from the water pump area, and on a 3 hour trip yesterday the temp gauge never got above 140. but the car ran great. do i need a water pump? and how hard is it to replace???? it's a sb 365hp. your help is apreciated!!!!
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Old Oct 5, 2009 | 11:59 AM
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If your WP was going out, you would have run hotter than normal, not cooler.

You can take a 18" piece of heater hose or a stick and use it as a stethoscope to try and pinpoint the noise. Be careful not to stick it in the fan blades.

Check the clutch fan and fan blade to make sure they are not coming loose.
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Old Oct 5, 2009 | 12:01 PM
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Check if your fan is loose or wobbly; replacing a water pump is not a hard job.
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Old Oct 5, 2009 | 12:06 PM
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thanks for the replies. i'll check it out!!
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Old Oct 5, 2009 | 12:37 PM
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And put a thermostat in it, 140 is way too cool.
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Old Oct 5, 2009 | 02:10 PM
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Originally Posted by Mike Ward
And put a thermostat in it, 140 is way too cool.
i have a 180 degree thermo. in it.
it looks like i need a new fan clutch. its not turning very well .
i wonder if the temp not going past 140 has anything to do with bad fan cluch? they both started to act up at same time.
guess i'll put a new one on and find out!!!!
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Old Oct 5, 2009 | 04:46 PM
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I think you may have found your rattle. Best not drive it until it's fixed.
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Old Oct 5, 2009 | 05:33 PM
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Originally Posted by Mike Ward
I think you may have found your rattle. Best not drive it until it's fixed.
yes, i think i found my rattle, the fan clutch would not even turn. i guess thats why the temp. gauge didn't go past 140. i guess thats what you guys with overheating problems should do is tack weld the fan clutch so it doesn't spin. i've had a problem with the car stalling at stop signs after it warms up. yesterday, with the thermo. at 140, it didn't stall once and i drive the car for over 6 hour. so i'm pretty sure my stalling problem has to do with heat, somehow?????? and if the clutch wouldn't turn, what was rattling?????
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Old Oct 5, 2009 | 05:43 PM
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Take the fan and rock it back and forth and see if you get any play in the clutch or the pump. Check to make sure the pump isn't bad before you take it apart to fix the clutch.
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Old Oct 5, 2009 | 05:49 PM
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Originally Posted by narlee
Take the fan and rock it back and forth and see if you get any play in the clutch or the pump. Check to make sure the pump isn't bad before you take it apart to fix the clutch.
thanks, i'll check it out!!!!!
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Old Oct 5, 2009 | 06:42 PM
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Alternators will rattle if the pivot bolt comes loose.
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Old Oct 6, 2009 | 10:24 AM
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Originally Posted by MikeM
Alternators will rattle if the pivot bolt comes loose.
thanks, Mike, i'll check that too!!
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Old Oct 6, 2009 | 01:17 PM
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You should switch to an electric water pump and get free horsepower.
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Old Oct 6, 2009 | 03:15 PM
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Originally Posted by vetsvette2002
You should switch to an electric water pump and get free horsepower.
I DIDN'T KNOW THERE WAS An elect. water pump?
i've got a water pump and fan clutch to pickup tommorrow. there not the originals, but the price is right. $50 bucks for the water pump and $28 for the clutch.
i went to a chevy dealer and priced the fan clutch. $270.12 plus tax.
just bend over, i'll be right with you!!!!!!
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Old Oct 6, 2009 | 03:28 PM
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If the clutch and fan are original don't toss them.
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Old Oct 6, 2009 | 03:46 PM
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Originally Posted by vetsvette2002
You should switch to an electric water pump and get free horsepower.
Yes great idea. During a technical summit held at this years Carlisle, a further refinement of installing a water turbine downstream of the water pump, which that drives the alternator to drive the water pump was voted upon and accepted. I believe the wind driven alternator mounted in tandem with an electric fan did not make the agenda, maybe next year.
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Old Oct 6, 2009 | 09:16 PM
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Originally Posted by 64tux
i went to a chevy dealer and priced the fan clutch. $270.12 plus tax.
just bend over, i'll be right with you!!!!!!
The same clutch (GM #3916141) is $125.00 from Paragon or GMPartsDirect.com.
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Old Oct 7, 2009 | 05:58 PM
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Originally Posted by JohnZ
The same clutch (GM #3916141) is $125.00 from Paragon or GMPartsDirect.com.
thanks, John. i just can't believe the different pricing on the same part.
it pays to look around and check prices!!!!
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Old Oct 7, 2009 | 06:20 PM
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thanks, narlee. i checked it out like you said, and i do need a water pump also. good call!!!!!
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Old Oct 7, 2009 | 06:36 PM
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Glad I could help. Now you can gather your parts and get it back on the road. If the pump was original it can be rebuilt. You could put on another one for now but save the old one.
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