13 votes

Why would a water pump be run off of the timing belt?

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 ...
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11 votes
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Why would a water pump be run off of the timing belt?

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 (...
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10 votes

My Toyota dealer replaced my water pump and failed to replace my coolant

It is unlikely that you would be able to drive a car without coolant for three weeks. I suspect what actually happened is that there was a coolant leak, possibly (probably) as a result of the work ...
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9 votes

Do cars ever use electric water pumps?

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 ...
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7 votes
Accepted

Coolant Reservoir

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 ...
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  • 15.9k
6 votes
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Do cars ever use electric water pumps?

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 ...
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  • 39k
6 votes

Electric water pump control

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 ...
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6 votes
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What parts are usually changed when the timing belt is replaced?

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 ...
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6 votes

Water leaking into frame case/engine?

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 ...
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  • 340
5 votes
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Use pulley from old water pump?

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 ...
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5 votes

Belt driven Water pump failure?

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 ...
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5 votes
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How to test the function of a water pump?

I've been wondering this too as a lot of overheating related questions come up. There are 2 ways water pumps fail - leaks and impeller failure. Leaks can typically be seen, so they are easier to ...
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  • 8,413
5 votes
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Should I replace my timing components when I replace the water pump?

Given that the water pump is in such a bad condition it could be that rest of the timing related parts (idler, tensioner, something else?) is in the same condition. I suspect the previous owner did (...
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  • 7,828
5 votes

Should I replace my timing components when I replace the water pump?

I would say you should replace the belt and tensioner while you are in there and everything is apart. If you really want to put the old belt back on I would consider: How close the vehicle is to the ...
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  • 8,413
5 votes

Renault Kangoo overheating - Waterpump? Thermostat?

There appear to be three problems here: Loss of coolant, and Overheating, and also No heat. That's a lot of problems to have show up all at once, so it would be good if we could find a common ...
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  • 14.3k
4 votes
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Installing a new water pump - what to do about the gasket?

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 ...
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4 votes

Do cars ever use electric water pumps?

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 ...
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4 votes

1994 Dodge Dakota V8, Antifreeze leaking from water pump

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 ...
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  • 13.2k
4 votes
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How can you tell if a water pump or water pump gasket is bad?

There are typically two ways to tell if a water pump is bad. The water pump won't turn. The water pump is leaking. In the event of a water pump not turning, the belt driving it will usually be ...
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  • 1,948
4 votes

Should I replace my timing components when I replace the water pump?

It it was my car, I'd do the timing gear whilst it was apart. I'm not a fan of reusing timing belts if they have to be disturbed plus it's a good opportunity to do it whilst everything is already in ...
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4 votes

Should I replace my timing components when I replace the water pump?

The 98 Mazda 626 owners manual states the timing belt should be replaced every 105k miles, or every 60k miles if you drive in extremely cold weather (indirect source https://mazda626.net/topic/31256-...
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  • 4,910
4 votes
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Leaking(Cracked) Water Pump

While I know you're asking about fit specifically, keep the following in mind, which I found on a forum discussing the differences between the N54 and N52: Both engines have an electric coolant ...
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3 votes

Belt driven Water pump failure?

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 ...
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  • 8,413
3 votes

Mysterious honda civic 2002 overheating some time

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.
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  • 20.9k
3 votes

Mysterious honda civic 2002 overheating some time

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 ...
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  • 6,499
3 votes

Why would a water pump be run off of the timing belt?

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 ...
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3 votes
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VW Mk4 TDI (ALH) – Suggestions for Removing Stuck Water Pump

So what ended up working for me was to cut a piece of 1x2 lumber (I couldn't fit a bigger piece from above) about 24" long and I braced it against the pump drive cog and pounded on it with a five ...
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  • 14.3k
3 votes
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2003 Kia Spectra - New radiator cap for a new radiator?

No. Reusing the radiator cap (almost certainly) didn't cause the water pump failure. The advice to replace the cap is probably based on the logic that the cap is a relatively inexpensive part and ...
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  • 14.3k
3 votes

Leaking(Cracked) Water Pump

In my travels, I haven't seen an aftermarket water pump listed for both the N52 and N54 engines. There are N54 water pumps with stronger materials though. You may wish to try one of those. And as has ...
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  • 12.1k
3 votes
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Reusing a Metal Water Pump Gasket

Metal and malleable material gaskets (like are found in GM intake gaskets), can be reused if there isn't any apparent damage to them. Even some MLS (multi-layered steel) head gaskets can be reused ...
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