How many of you have replaced your (N52/2.5/3.0) Water Pump?
- Thread starter mariojoshi
- Start date
3 litre auto coupe replaced at 47k
Prices were ridiculous so I bought one on ebay and got a local indy to fit it for around £400 all in.
Prices were ridiculous so I bought one on ebay and got a local indy to fit it for around £400 all in.
A
Anonymous
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Smartbear said:
Yes sorry , blonde moment Rob, it is indeed magnesium, and I will bow to you superior knowledge about the reasons why it needs a pump, as that info came from the Indy that did the job. My car is pre facelift so I'm not that up with the N52 . Thanks for the info though .
Bryan
How long should a 3.0 N52 take for the coolant temperature to get up to "normal"?
Mine seems to take a long time, almost like a traditional engined car without a thermostat. Maybe seven or eight miles of steady driving before it is up to temperature and the heater seems weak until then too..
Once up to temperature it seems to maintain it ok, neither over or under heating.
Mine seems to take a long time, almost like a traditional engined car without a thermostat. Maybe seven or eight miles of steady driving before it is up to temperature and the heater seems weak until then too..
Once up to temperature it seems to maintain it ok, neither over or under heating.
Water temp comes up within a couple of miles for me. Less than 5 mins.
North West Surrey
Mine takes 2/3 miles to get to normal water temperature now it is a bit warmer.
I have a 56 plate 3.0 Coupe, and my water pump failed in January. Temperature gauge just shot into the red with the warning light on.
By the way the general consensus is to stop as soon as possible if this happens to avoid any resultant damage.
So mine only lasted 9 years and 62K miles. OEM pump cost £500, thermostat another £100 so by the time my local Independent specialist had fitted it and refilled the cooling system the bill was pushing £800! Ouch! Still I suppose if this one lasts 9 year as well that isn't so bad!
Out of curiosity I looked on the ECP website the other day and they quote £340 for the pump, so not loads cheaper.
Shame it is so expensive as the N52 engine is otherwise so wonderful!
I have a 56 plate 3.0 Coupe, and my water pump failed in January. Temperature gauge just shot into the red with the warning light on.
By the way the general consensus is to stop as soon as possible if this happens to avoid any resultant damage.
So mine only lasted 9 years and 62K miles. OEM pump cost £500, thermostat another £100 so by the time my local Independent specialist had fitted it and refilled the cooling system the bill was pushing £800! Ouch! Still I suppose if this one lasts 9 year as well that isn't so bad!
Out of curiosity I looked on the ECP website the other day and they quote £340 for the pump, so not loads cheaper.
Shame it is so expensive as the N52 engine is otherwise so wonderful!
Thanks.
Monitored it a bit more closely today using a Scangauge II.
Starting from about 5°C and driving at a steady 50mph most of the time.
1 mile 42°C
2 miles 53°C
3 miles 59°C
4 miles 64°C
5 miles 69°C (and temp gauge just about reading "normal" by this point)
6 miles 74°C
7 miles 77°C (heater just starting to put some properly warm air out)
8 miles 81°C
9 miles 83°C
10 miles 84°C
11 miles 89°C
12 miles 91°C
13 miles 92°C
14 miles 93°C
Next ten miles it didn't really change from 93°C, bit of motorway, bit of stop-start.
So it warmed up quite well for the first mile and then pretty slowly from then on. Would I be right in saying the thermostat is rated at 97°C so it should reach at least this temperature and then not drop below it?
Thermostat opening too soon and too much?
Monitored it a bit more closely today using a Scangauge II.
Starting from about 5°C and driving at a steady 50mph most of the time.
1 mile 42°C
2 miles 53°C
3 miles 59°C
4 miles 64°C
5 miles 69°C (and temp gauge just about reading "normal" by this point)
6 miles 74°C
7 miles 77°C (heater just starting to put some properly warm air out)
8 miles 81°C
9 miles 83°C
10 miles 84°C
11 miles 89°C
12 miles 91°C
13 miles 92°C
14 miles 93°C
Next ten miles it didn't really change from 93°C, bit of motorway, bit of stop-start.
So it warmed up quite well for the first mile and then pretty slowly from then on. Would I be right in saying the thermostat is rated at 97°C so it should reach at least this temperature and then not drop below it?
Thermostat opening too soon and too much?
It's not simply magnesium, in actual fact the important bits are aluminium and magnesium is just used for the main bulk of it.Smartbear said:
The N52 engine block is cast with magnesium and aluminum for the crankcase. Magnesium is used to save weight, however magnesium is subject to a greater risk of corrosion from water. Moreover, magnesium may tend to creep under load at high temperatures. Thus, magnesium in its pure form or as a conventional alloy is not suited for permanently conveying high loads and forces of the kind typically encountered in central components of the engine. Therefore, BMW combined the N52 block to use magnesium alloy for the crankcase shell, with an aluminum “inner block” to complement the magnesium disadvantages.
Hi All,
Don't want to open another thread for this well known problem with water pump on our Z4, but since I have just faced it on my 3.0SI, I'd like to get your feedback on this price quoted by BMW dealer (in France):
Water pump + thermostat replacement:
Labour & parts: €1'200.0 (approx. £1'020.0)
They have a very expensive manhour = €98.0 per hour (£83.0), which maybe higher than in UK. However I still feel scammed by the price given to me on the phone...
Job is done, cause I need the car back with me urgently. But by just checking what everyone seems to refer to on the forum (between £700-900 for the job), I am wondering why these guys are so expensive here.
Does anyone remember the time used by BMW technicians for replacing both parts?
Cheers.
Don't want to open another thread for this well known problem with water pump on our Z4, but since I have just faced it on my 3.0SI, I'd like to get your feedback on this price quoted by BMW dealer (in France):
Water pump + thermostat replacement:
Labour & parts: €1'200.0 (approx. £1'020.0)
They have a very expensive manhour = €98.0 per hour (£83.0), which maybe higher than in UK. However I still feel scammed by the price given to me on the phone...
Job is done, cause I need the car back with me urgently. But by just checking what everyone seems to refer to on the forum (between £700-900 for the job), I am wondering why these guys are so expensive here.
Does anyone remember the time used by BMW technicians for replacing both parts?
Cheers.
Got me worried now as mine is coming up to 60k. Trawled the net for the parts cost, and got a great price, not more then 12miles from me in Wolverhampton. OEM Water Pump, New Bolts, Thermostat and hose £315 all in inc vat. 
Ring Sam on 01902 858927.
Ring Sam on 01902 858927.Hilly30si said:Got me worried now as mine is coming up to 60k. Trawled the net for the parts cost and got a great price not more then 12miles from me in Wolverhampton. OEM Water Pump, New Bolts, Thermostat and hose £315 all in inc vat.
If that price is correct then it's much cheaper than normal
Rob
At that price they must surely be recon?
Got my car back this afternoon, and I must say, I was glad to have the problem gone.
Now as for the price, there I was also (slightly) relieved when I saw the figure on the invoice: €1'074.0 instead of the 1'200.0 announced!
Since I thought this type of task was rather straight forward and BMW for sure would give me a precised quote, I was not expecting to see anything lower. Obviously the technician preferred to approach me with a bigger number to then reduce it in the end... don't know exactly the reason behind this at the point were I was, I was anyway going to say "go-ahead, I need my car back"!
Here the price breakdown - in Euros, in case someone would happen to need a water pump/thermostat during holidays in France
Water pump: 538.0
Thermostat: 127.8
coolant fluid/bits and pieces of hardware: 41.71
mhrs: 3 = 294.0
And the rest was for plugging the fault code reader and drive test.
Worse thing is they left the car rather dirty inside with a big footmark on the clear carpet, guess BMW dealer aren't providing a premium service any longer :?
Now as for the price, there I was also (slightly) relieved when I saw the figure on the invoice: €1'074.0 instead of the 1'200.0 announced!
Since I thought this type of task was rather straight forward and BMW for sure would give me a precised quote, I was not expecting to see anything lower. Obviously the technician preferred to approach me with a bigger number to then reduce it in the end... don't know exactly the reason behind this at the point were I was, I was anyway going to say "go-ahead, I need my car back"!
Here the price breakdown - in Euros, in case someone would happen to need a water pump/thermostat during holidays in France
Water pump: 538.0
Thermostat: 127.8
coolant fluid/bits and pieces of hardware: 41.71
mhrs: 3 = 294.0
And the rest was for plugging the fault code reader and drive test.
Worse thing is they left the car rather dirty inside with a big footmark on the clear carpet, guess BMW dealer aren't providing a premium service any longer :?