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Noise coming from water pump when engine is running, very slow or virtually no circulation of coolant in the radiator. To hear if the water pump bearing is going out..Take a long screwdriver or tire iron and touch and hold against water pump while engine is running, put ear to other end..works like a stethoscope..just be careful you have it in a steady place on water pump so belt doesn't turn it into a projectile! if you feel like its the water pump, take serpentine belt off and see if pulley on water pump has any play up or down or front to back, and spin with hand should spin freely...if has play or doesn't spin freely or you can hear, usually a kind of whining noise coming from water pump, it needs replacing. The water pump also has a small hole onthe bottom side, if the diaphragm in waterpump goes bad it will usually have a slow steady drip coming from the hole. Have you had the radiator pressure tested?
The technique I always used to identify where such a noise was coming from was to use a very long screwdriver (2 feet long), while the engine is running. CAREFULLY touch the screwdriver end to each pulley or other object under the hood, and put your ear to the handle. The device making the noise will become very clear.
It could be AC pump/clutch, alternator, water pump, power steering pump, etc.
If your engine looks the same as the video, the pump can removed without having to move other components out of the way.
Loosen the pump pulley bolts with the serpentine belt still on. This will put tension on the pulley so it doesn\'t turn. Then take serpentine belt off. Then remove the four bolts on the water pump. Have a drip pan under the pump. Clean pump mating surface on the engine. Install new pump with O ring. The link below gives detailed info.
HI Clark You didnt mention type of car and engine but I will try for to look at the alignment of the pulley on the waterpump and relation to the other pulleys it could be there is a stress factor put on these water pumps to fail as you say. One must find the cause,, would you have the orignal pump to match it up with the rebuilt ones? you may endup going to a dealer and borrow to match up with the ones they keep putting on from the same supplier.Make sure you have no vibration coming from all these pulleys they seem of replaced something is out of tune to blow those seals in a water pump they are doubled sealed.Or are you getting new ones?..... missing info no problem I wouldve love to tackle this problem when I was in the trade.;)
Park your car overnight and put a
large white piece of paper underneith your car. In the morning check
the paper. If the paper is wet with liquid, you could have a water pump
If the paper has green (in most
cases) fluid on it, there is a good chance your vehicle is leaking
coolant (sometimes refered to as "water"). In many cases, when you are
leaking coolant it could be coming from the water pump.
Turn the engine off and open the hood.
Locate the water pump pulley.
The pulley is the round part that the belt is attached to. To find it,
look for the belts. You will see more than one pulley. Your car will
have an alternator with a pulley and perhaps an air conditioner, power
steering and smog pump pulleys. If you are unsure, ask your mechanic to
point out the water pump pulley.
Grab opposite ends of the round
pulley and check for "play" (looseness): Try to rock it back and forth.
There should be no give. If there is, the bearings are going and it's
time to replace the water pump. By the time you can feel play in the
water pump pulley, you may also be able to hear the bad bearing when the
engine is running - there may be a low-pitched grinding noise coming
from the water pump pulley.
Visually check the water pump
(it's located behind the pulley) for signs of a coolant leak. If the
water pump gasket is leaking, it must be replaced. This is a good time
to get a new water pump, too, unless it was just recently replaced.
First drain the coolant if possible (you will find a drain **** on the bottom drivers side of rad). Loosen the water pump pulley bolts while serpentine belt still attached (10mm X 4). Remove the serpentine belt, and plastic diagram bracket just above the waterpump. Remove the (8mm bolts X 5) holding the water pump to front engine housing. Note the little arrow or triangle at the top of waterpump when removing, it will help you to install new water pump in same location. Scrape off most of the old gasket material, use fine sand paper to clean engine surface as best as possible. Install new gasket to water pump, and align the holes (it only goes on one way, and maybe upside down if they don't line up). Locate arrow and reinstall, torque 5 bolts to 89 in/lbs tight but not too tight. Reinstall pulley, serpentine belt and bracket. Tighten the pulley bolts, refill coolant (close drain ****). Just above the waterpump there is a coolant hose with a little 7mm screw for a bleeder. Open the bleeder (engine off). Continue to fill rad with coolant until it comes out bleeder. Close bleeder and test run. Recheck the coolant level later when cooled.
Serpentine belt tightener pulley bearing was bad, made a loud noise. I replaced the pulley (jobber part) and the noise level was reduced enough to notice the waterpump was also making a noise ... more revs = louder noise. I am now replacing the water pump. (approx 60k Miles too).
Looking at belt routing below, the water pump is the pulley all the way to the right, will have 4 10mm bolt's holding the water pump pulley, loosen 4 small bolt's on water pump pulley, remove serpentine belt, remove small water pump pulley bolt's all the way off, remove pulley, now you can see water pump, remove small 8mm bolt's from water pump, now water pump will come right off, hope this was very helpful.
I would say the water pump is bad , Take the belt off spin the water pump with your hand , should feel smooth . Look at the top of pump for a small hole , this is the vent hole , most water pump leaks are here . You may need a flashlight and mirror to see behind the pulley . hope this helps
Remove the Fan Shroud. You have to do this with Both the Old and New Waterpump out. The fan has 4 Nuts that hold it on to the Pulley. Remove these and Remove the Fan and the Pulley. You will need the Studs off of the Old Waterpump and they are Threaded into the Small Circle that is on the Front of the Waterpump Under the Pulley. There is no Easy way to get these off. It is Tough. Then when you are done Fighting with these, Install the Studs on the New Waterpump and Install the Pump. You can do this either with or Without the Fan already put back on. Please Rate My Response! Thanks!