Water Pump Causing A Rapid Knocking Sound
Nov 26, 2012
After doing some searching I was unable to find what exactly would cause a water pump to create a knocking sound and was wondering how or why a water pump for a 350 (5.7l) would knock.
The other day I had to change the water pump on my '96 k2500 (w/ 5.7l). Bought a brand new pump and put it on, refilled the coolant. No odd noises. Heater blew out very hot air, too. Drove for about 20 miles then parked it for about 6 hours. the radiator was still full and no signs of leaks - everything looked normal.
Within 10 seconds of starting the truck there was a rapid knocking... like numerous valves were suddenly out of adjustment or rod bearings crapped out. Shut it off and rechecked everything started it again. The oil pressure was steady at about 55psi. shut it off again.
With the serpentine belt off, oil pressure was good and there was no knocking. Put the belt on and the knocking returned. I also tried it with the fan removed and the belt on - still knocking.
Returned that water pump and got another and so far no problems. But I still wonder, if it was a bearing or maybe some impeller tolerance was off or what exactly in a water pump could cause a rapid knocking sound.
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[URL] .....
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Recently blew the belt that runs the water pump, etc while on a vacation. Had to leave the car at a small mechanic in Winthrop, WA. He replaced the Water pump which had gone bad and the belt that shredded. The car ran beautifully for a week. Now there is this constant rattling sound coming from the water pump area. I attached a video with the sound. The sound will quicken as you accelerate. At cold start up it is usually not present then starts a couple of minutes in.
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Given the vehicle is 12 years old and has 89K miles it appears it is in the age and range of where this leakage can occur. Any knowledgeable engine rebuilders that are familiar with this issue on the 4.2 have any comments???
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2. Are there new and improved head gaskets for this motor???
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Its a 2008 Volkwagen jetta with about 60000 miles on it. My car makes a rapid fire clicking sound. I've checked the battery connections and they seem fine. When I tried to jump start, the electronics inside start flashing to the same clicking sound. The check engine light is on.
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While driving down the street, I noticed the radio head unit flicker, then it shut off. The car kept driving for about 2-3 city blocks, then all the lights shut off (dash lights, headlights, tail lights, brake lights). I turned onto a side street and the car couldn't go above 10-15 mph, it seemed. The speedometer and other gauges started going berserk, followed by a ton of dash lights coming on. The car basically rolled to a stop. I put it in park, turned the key to off and had it towed to my house. When I turn the key to accessory, all the lights work, as well as the heater and radio. But when I turn the key to start the car, a rapid-clicking sound comes from under the hood.
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It is not electronic as the controls are solid state and the can bus adapter is behind the head unit. It seems mechanical but what could it be? I definitely notice that at a stop when rocking the brake that create the start of the clicking sound .
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I've had a used 2007 V6 Camry for about six months now.
I recently started noticing a quiet set of rapid clicks/clacks sound coming from engine compartment/firewall area more or less on driver side. I'm not sure if it was there all along or if I just began noticing it.
It occurs after starting the car, putting it in drive and as soon as I let off the brakes and begin rolling. It might only happen going forward. I will have to notice if it does it in reverse.
It happens rapidly and stops and I don't hear it again until I repeat the steps above after the car has sat a while. I don't believe it will do it again, if say, after doing it once I stop, put it into park and then back into drive and go.
I don't believe it's the CV joints. It does it once and stops and is not related to movement of the steering wheel. It almost reminds me of a relay switching something.
I'll also add that I had a 1995 Prizm and 2000 Corolla that did the same thing. Both were manual transmissions. The click they made was much louder though their cabins were not sealed as well as the Camry. The clicks would happen only after the car had sat a while as soon as the car first started rolling and then would stop. Could it be the same thing in all three cars?
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I was on the return trip of a 300+ mile drive when I noticed a rapid clicking/ticking sound roughly under the right side (passenger side) dash of the car. It was not affected by turning, accelerating or braking. The clicking was not constant, not very loud (I did not notice it over my music at first) and would come and go. If it was affected by anything, it appeared to come or go when a bump was hit, but that also wasn't necessarily always the case (hit bumps and it didn't stop, hit bumps and it didn't start). I checked wheel wells and under car for objects (suspension is a bit worn and car is low to begin with, so it rides close to ground and this has been a problem before; didn't seem similar) and there was nothing.
Google has led me to the possibility of sticky lifters, and though the sound is similar-ish, I am under the impression that this would be a much more constant noise and I am also fairly confident in the current quality of my oil.
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There is water sound under dash. I read about clogged drain so I tried sticking up a thin rod from drain line and gets stopped after some length. Should I force it up (push, hit harder) or will that break something? Is there a angle bend?
I did not get a water leak on carpet yet but the sound is getting more so more water collecting? What should I do next?
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