Hot answers tagged

7

It sounds like you're asking several questions at the same time. In terms of the symptoms of failure, you don't give a lot of information about your specific car. However, some basics always apply: leaks (especially at the bottom of the timing belt cover) and basic failure to move the coolant (are you overheating this summer?). In terms of cost, you're ...


7

This particular bottle is knows as a degas bottle. The reason it has a strange shape is two fold. First, the bottle needs to fit somewhere and the shape helps that. Second and more important is that these degas bottles hold pressure. The shape reinforces the bottle so that it does not explode. In cooling systems with degas bottles the coolant does not ...


6

I think the overheating episode did a permanent damage to your car. A gasket could have cracked or the head could have warped or even cracked, thus allowing water into the engine itself. Too much heat in an engine can cause serious problems because heat causes metal to expand. The hotter the engine gets, the tighter clearances become until there are ...


6

Engine safety. If you lose an accessory belt driven water pump, you're likely to keep driving, thinking the "oh, I just don't have an alternator" while you're busy cooking your engine beyond repair (normally with no temperature notification/change, if anything it'll read cold). When the water pump is on with the timing belt (or geared to crankshaft as is ...


6

Is there as much to gain as what has been achieved with electric fans? Remember you aren't gaining anything. Just like a belt run fan, each is a parasitic loss of power. When you put an electric water pump on the engine, you are regaining some of the lost power which you didn't have access to in the first place. This will allow for better fuel mileage, ...


5

The lifespan of a replaced waterpump will vary with quality. You have no way of knowing what type of pump you paid for. Was it a factory new pump, an aftermarket new pump, rebuilt pump or remanufactured pump. Factory pump is an exact replacement of what the car came with High quality new aftermarket pump may include improvements to the original design ...


5

If this looks like your water pump, then yes you can: The tilt in the pulley is caused not from a broke shaft, but from a worn bushing which the shaft rides upon. This is just one of the symptoms which shows up when the pump is dying a short miserable death. As the bushing wears out, there is created more and more space (slop) which allows the shaft to ...


5

Impossible to say. I can only offer my own anecdotal Toyota experience. I had to have the engine rebuilt on my MR2 at 180,000 miles (due to oil pump failure). The original water pump was still working fine, no leaks, no problems at all at that point. However, since the whole engine was out and being rebuilt, we replaced it. At my 240,000 mile timing ...


5

I think the main reason for this is convenience. It's an easy place to run the water pump. If you ran it out to a fan belt, it would be in the way of the timing belt while doing it, or it would be a really awkward mess trying to work around it. The second reason is for compactness. With the water pump stuck out of the way, it physically makes the engine ...


5

The W12 engine produced by VW utilizes both mechanical and electric water pumps (underlined with green). According to VW's documentation: The cooling system of the Audi A8 with W12 engine is made up of the following components: Water pump in cylinder block/crankcase driven mechanically by Poly-V belt Map-controlled electrically operated ...


5

BMW abandoned their mechanical water pump in the 3 series when they moved to the E90 generation in 2006. The electric pump is the only pump. A quick search reveals that all other typical cooling system components (i.e. thermostat) still exist, so even when the engine is warming up the coolant circulates. This is probably to prevent hot spots which could ...


5

Well, I need to do more studying before I post here. I was under the assumption that the teeth-side of the timing belt was driving the water pump. In fact, the smooth side of the belt is driving the pump, and especially if the belt or pump is very old like in my case. It is possible that the belt is either not causing enough traction to move the pump or ...


5

I've been wondering this as a lot of overheating related question come up. There are 2 ways water pumps fail - leaks and impeller failure. Leaks can typically be seen, so they are easier to diagnose. Impeller failure is difficult to detect. Typically, the engine will overheat, but the heater core and radiator will still be cold. With a thermostat ...


4

Obviously the timing belt needs to be replaced. Then they could change any followers or guides which mechanically get worn out. I would always recommend getting the water pump changed if it is driven off of the belt, or located in the same vicinity as the belt. The reason for this is, if you have to remove everything to replace the pump (ie: timing cover, ...


4

The 3.8 Natural Aspirated Engine was a rather solid design and were rarely known to blow head gaskets. Their weak point seemed to be the plastic Intake Manifold. Here are the three possible causes to your issue. If you are 100% sure that it's oil in the coolant then remove the intake manifold and check the Intake Manifold Gaskets upper and lower for any ...


4

In answer to the original question you asked, yes, I happen to know for a fact that the Mk3 Volkswagen Golf VR6 uses an electric water pump. The purpose of this pump is to keep hot coolant circulating after the engine has been shut off to prevent hot spots and heat soak causing damage. However, this is used in tandem with a mechanical pump which runs all ...


4

In most vehicles the seal on the water pump will fail when the bearings go bad, or something else bad happens to the pump. Water leaking from the pump is almost always an indication that the pump is shot and needs to be replaced. Of course, also check all your hoses for bursts or clamps that have come off. The water might look like its coming from the ...


3

Cheap waterpumps - like any mechanical component - can fail quickly, sometimes this happens. Do you have a warranty on the replacement pump? Also, are you certain that the water pump has been replaced? It's not too uncommon for some mechanics to skip the water pump replacement because the pump "still looks good" only for it to fail shortly after the timing ...


3

It doesn't sound like a fuel line problem ( though there's a small small chance it's a fuel pump ), it sounds like your engine isn't getting enough air on one end or the other. It might be a dirty air filter, or it might be a clogged cat or bad O2 sensor. Sometimes it's easy to tell if the cat is clogged, it will get extra hot and turn red and that's your ...


3

Hopefully your mechanic would pressure test the water pump before replacing it to determine if it's really bad. Having no heat is usually a symptom of a stuck open thermostat, but if that was the case, your temp gauge would not indicate hot...maybe a clogged heater core? Did your heater core get flushed? That wouldn't explain the temp gauge reading hot, ...


3

I'm in general agreement with Ben. Cooling fan not working. The description of high vehicle speed = okay and low speed not means your fan isn't working for you. This could be a problem with fan controller, fan motor or temp sender used to turn on fan. Note, the fan shrouds matter big! Ensure they are sealed off to radiator correctly. Please check the ...


3

I would check the water pump, it sounds like the blades may have corroded away. From your description it certainly sounds like the water isn't circulating.


3

Bubbling in the coolant reservoir indicates a bad head gasket, while it may not explain the no heat it's time to trade your car in. Assuming the coolant is full and the engine is up to temp, check your heater hoses if one is cold and the other hot than the heater core is plugged. If both are the same temp than you'll have to look under dash and make sure ...


3

I had this issue on one of my cars. The impeller on the water pump was plastic and had cracked. The timing belt was spinning the pulley, but the impeller was not necessarily spinning. The new one I put in was metal.


2

The water pump is a mechanical pump that is one of the belt driven devices in your engine. This pump is what circulates the coolant (when the parts are referred to for water, they mean coolant. Water hoses, water outlet, water inlet, water pump, etc are all carrying coolant). The water outlet is simply a pipe, on one end of it is the engine block, on the ...


2

I have 300 miles on my second water pump. They had to put another one in. 6 months on the 4th water pump. Had it replaced today under warranty and its noisy. I pointed it out to mechanic an hour after taking the car home. I suspect I'll be on number 6 by the end of the month. The vehicle is 2002 Hyundai Elantra GLS.


2

Water pumps are expected to last at least as long as the timing belt change interval. It's a relatively cheap part in a high labor location, so it's common to replace it with the timing belt just to potentially save on labor later on. It shouldn't fail so rapidly, however, it is possible. Bad parts and early failures do happen sometimes.


2

Historically the water pump was at the front of the engine in close proximity to the vehicle radiator, when vehicles were mostly rear wheel drive. There is no real advantage with todays vehicles but they continue to be at the front of the engine. Using the timing belt to drive the water pump lends itself to compactness at the front end of the engine. Some ...


2

They are basically the same thing. Use the gasket and put the gasket maker on either side of it. It will do the same job and work just as well. Don't put it on too thick, just enough to hold the gasket in place on the block or on the pump. Should leave you in good stead.


2

Head gasket is the only likely culprit here. It is possible that the shop did something they shouldn't have when replacing the water pump that could have damaged the head. I've seen head bolts loosened inadvertently due to negligence. This is not an indictment of your mechanic, it could be pure coincidence or some odd issue with the water pump adding more ...



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