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E90/E91/E92/E93 (2006 - 2013)
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  #1  
Old 06-28-2012, 03:57 PM
dgallant dgallant is offline
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E92 - When to replace water pump, thermostat, hoses, sending unit, etc?

I haven't been able to find a recommendation on performing a preventative cooling system overhaul on the 2007 328i (mine's a coupe). By overhaul I'm considering the water pump, thermostat, level sending unit, overflow tank, hoses and belts.

Is there a consensus on when this should done? Any other parts you would recommend replacing?
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  #2  
Old 06-28-2012, 04:31 PM
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floydarogers floydarogers is offline
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Quote:
Originally Posted by dgallant View Post
I haven't been able to find a recommendation on performing a preventative cooling system overhaul on the 2007 328i (mine's a coupe). By overhaul I'm considering the water pump, thermostat, level sending unit, overflow tank, hoses and belts.

Is there a consensus on when this should done? Any other parts you would recommend replacing?
There isn't a consensus AFAIK. The pump and thermostat are far different than on previous motors (M54 etc.) The pump is electrical rather than belt driven, and is far more expensive ($500 or so for the part, $100 for the 'stat). I've seen a couple stories about the pump failing - but unlike on previous models, the ECU shuts down the engine (first reduced power) and makes you park it. This seems to be preventing loss of engine.

Replacing the radiator, expansion tank and hoses at 100K - at least they're inexpensive.
Note that, since the belt doesn't drive the pump, your battery will keep it running so that's not a critical issue.
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  #3  
Old 06-28-2012, 06:52 PM
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CALWATERBOY CALWATERBOY is offline
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Quote:
Originally Posted by dgallant View Post
I haven't been able to find a recommendation on performing a preventative cooling system overhaul on the 2007 328i (mine's a coupe). By overhaul I'm considering the water pump, thermostat, level sending unit, overflow tank, hoses and belts.

Is there a consensus on when this should done? Any other parts you would recommend replacing?
No PM schedule for all but maybe hoses & belts.

None the less, to attract really good energy, repeat this monotone mantra until enlightenment is achieved:

"If it ain't broke don't fix it"
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Old 06-28-2012, 07:22 PM
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Bemo Bemo is online now
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Originally Posted by CALWATERBOY View Post
No PM schedule for all but maybe hoses & belts.

None the less, to attract really good energy, repeat this monotone mantra until enlightenment is achieved:

"If it ain't broke don't fix it"
Bull how about "F&ck I should have overhauled the cooling system before it broke"
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  #5  
Old 06-28-2012, 08:59 PM
ctuna ctuna is offline
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If you want to practice aircraft maintenance

If you want to practice aircraft maintenance.

Get the Mike Miller maintenance schedule and rebuild the cooling system according
to his schedule . Google Mike Miller BMW
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  #6  
Old 06-29-2012, 03:21 AM
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CALWATERBOY CALWATERBOY is offline
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Originally Posted by Bemo View Post
Bull how about "F&ck I should have overhauled the cooling system before it broke"
The mantra of hard Sadhana.

Mr. Miller sez:

It actually pains me to recommend replacing the entire cooling system preventively
before 100,000 miles, as above. Yet experience has shown this maintenance is cheap
compared to the alternative. It is unbelievable how many engines are destroyed in these
cars by premature cooling system failures.


BUT goes on to say:

The N-series engines do not seem to suffer the sort of regular and systematic cooling
system failures that led me to recommend replacing the entire system on the above
engines as a preventive measure. If your BMW is a 2006 or newer and not an E46, then
you've got an N-series engine.


OK.....who gets this witty joke?

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Last edited by CALWATERBOY; 06-29-2012 at 06:57 AM.
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  #7  
Old 06-29-2012, 06:31 AM
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Saintor Saintor is offline
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If it was a 2006 325i or 330i or a 335i I would suggest you to do it at 80K miles. There is a trend

But given the very rare occurrences on the N52N (redone in part 2007+), I would pass (I am in the same boat).
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  #8  
Old 07-02-2012, 10:26 AM
dgallant dgallant is offline
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Thanks for the feedback. It is making me feel better about my 2007 328i (coupe). I'm at 68K miles. This and Mike Miller's stuff has me feeling better about my cooling system.
I had overhauled the cooling system in my last bimmer, an E46 - 2000 323ci, which I know was a good move. I wasn't looking forward to doing it again to be honest.
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  #9  
Old 07-02-2012, 08:02 PM
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the kidd the kidd is offline
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Quote:
Originally Posted by ctuna View Post
If you want to practice aircraft maintenance.

Get the Mike Miller maintenance schedule and rebuild the cooling system according
to his schedule . Google Mike Miller BMW
ahh, I was just searching for this myself the other night.
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