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 ...
Steve Matthews's user avatar
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 ...
Lathejockey81's user avatar
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 ...
vini_i's user avatar
  • 16k
6 votes
Accepted

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 ...
Zaid's user avatar
  • 39.2k
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 ...
Pᴀᴜʟsᴛᴇʀ2's user avatar
5 votes
Accepted

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 (...
Martin's user avatar
  • 8,448
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 ...
rpmerf's user avatar
  • 8,443
5 votes
Accepted

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 ...
rpmerf's user avatar
  • 8,443
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 ...
Nathaniel Davidson's user avatar
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 ...
dlu's user avatar
  • 14.5k
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 ...
JPhi1618's user avatar
  • 13.3k
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 ...
Steve Matthews's user avatar
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-...
Jason C's user avatar
  • 4,900
4 votes
Accepted

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 ...
Dalton D's user avatar
  • 1,958
4 votes
Accepted

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 ...
Lathejockey81's user avatar
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 ...
Steve Matthews's user avatar
3 votes
Accepted

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 ...
Pᴀᴜʟsᴛᴇʀ2's user avatar
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 ...
tlhIngan's user avatar
  • 12.2k
3 votes
Accepted

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 ...
dlu's user avatar
  • 14.5k
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 ...
rpmerf's user avatar
  • 8,443
3 votes
Accepted

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 ...
dlu's user avatar
  • 14.5k
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.
HandyHowie's user avatar
  • 25.2k
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 ...
zipzit's user avatar
  • 6,559
3 votes

Testing / checking a water pump

What I did to diagnose a problem with the water pump on my 98 Mazda 626 was to drain the coolant, remove the thermostat and use a cheap PC based endoscope I got off Amazon to visualize the water pump ...
Robert S. Barnes's user avatar
3 votes
Accepted

Volvo 2.0D engine "self-oscillates" after changing timing belt and adjusting fuel-injectors

Please state the exact engine code, it would be also nice to know the exact work that he did there. Just some informations on injector maintenance: Injector maintenance is a very complicated thing, ...
Martin's user avatar
  • 8,448
3 votes

When should water pump and radiator be changed

In general for cars which have cambelt driven water pumps like the R32 (I believe it still uses one?), you change it out when you change the cambelt. It's just good practice and you'll find most ...
Pᴀᴜʟsᴛᴇʀ2's user avatar
3 votes
Accepted

Coolant Leaks while Engine is Running on 2003 Hummer H2

The water pump tends to leak (more in some cases, or only in some cases) when the engine is running due to a few reasons: the pump causes a pressure difference in the system the cooling system ...
Solar Mike's user avatar
  • 34.7k
3 votes
Accepted

Tightening sequence for water pump bolts (Peugeot 406 1.8 16V)

If there is no tightening sequence listed in the service manual, I would just use a star pattern. Probably 1,3,5,2,4.
David Watson's user avatar
2 votes

1995 Pontiac Grand Am Over-Heating and Cold air from heater, why?

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 ...
Ben's user avatar
  • 10.7k
2 votes

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

Timing belt, timing belt tensioner, spark plugs and maybe spark plug wires, water pump, thermostat and all other belts. I also at that time drain my transmission fluid (not flush).
Kim's user avatar
  • 21

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