335d Water Pump

jaybird124 · 12-27-2010, 02:02 PM

Does the 335d have a belt driven or electric water pump?

If you notice on Tischer, the diesel pump is significantly cheaper than the other pumps. Wonder what the durability has been with these units as well.

Coolieman1220 · 12-27-2010, 02:51 PM

i'd imagine electric cause its turbo. If the car needs to cool turbos after running it can stay on....

CirrusSR22 · 12-27-2010, 03:22 PM

By the looks of the diagram I would say it's belt driven.

http://www.realoem.com/bmw/showparts...65&hg=11&fg=35

jaybird124 · 12-27-2010, 03:27 PM

Quote:

Originally Posted by Coolieman1220

i'd imagine electric cause its turbo. If the car needs to cool turbos after running it can stay on....

I believe the D's are oil cooled. Seems like I read somewhere that theres no evidence that these have water jackets.

The HACK · 12-27-2010, 03:40 PM

They're mechanical (belt driven). As for longevity between the belt driven pumps and electrical pumps, PHYSICALLY the electrical pumps should last longer, since there's no extra set of bearings for the belt driven portion of the pump. Bearing failure between 80,000-120,000 mile for the mechanical pump is a GIVEN.

However, this iteration of the electrical pump seems to be plagued with gremlins. As far as I know, most of the early failures are electrical problems, not mechanical failures.

jaybird124 · 12-27-2010, 03:42 PM

Quote:

Originally Posted by The HACK

They're mechanical (belt driven). As for longevity between the belt driven pumps and electrical pumps, PHYSICALLY the electrical pumps should last longer, since there's no extra set of bearings for the belt driven portion of the pump. Bearing failure between 80,000-120,000 mile for the mechanical pump is a GIVEN.

However, this iteration of the electrical pump seems to be plagued with gremlins. As far as I know, most of the early failures are electrical problems, not mechanical failures.

So I should replace my pump at 100k?

The HACK · 12-27-2010, 04:27 PM

Quote:

Originally Posted by jaybird124

So I should replace my pump at 100k?

Probably. Those bearings in the pump don't last forever.

fdriller9 · 12-27-2010, 05:46 PM

Yea e46s had problems with the water pump. Many owners had to swap them out around 80-100k. Some even earlier for preventative maintenance.

They also replaced the thermostat.

jaybird124 · 12-27-2010, 05:56 PM

Quote:

Originally Posted by *********

Yea e46s had problems with the water pump. Many owners had to swap them out around 80-100k. Some even earlier for preventative maintenance.

They also replaced the thermostat.

I believe that instance had more to do with the impeller, like the E36. Is that correct?

ninesixtwo · 12-27-2010, 07:56 PM

Quote:

Originally Posted by jaybird124

I believe that instance had more to do with the impeller, like the E36. Is that correct?

The E46 has a metal impeller. Or maybe I'm thinking of the E46 M3 only. The replacements for E36 pumps are all metal though? Anyway I would like to know the issue with the E90 pumps. If someone could throw out there whether the N52 has an electric pump I would be curious about that too.

jaybird124 · 12-27-2010, 08:16 PM

Quote:

Originally Posted by ninesixtwo

The E46 has a metal impeller. Or maybe I'm thinking of the E46 M3 only. The replacements for E36 pumps are all metal though? Anyway I would like to know the issue with the E90 pumps. If someone could throw out there whether the N52 has an electric pump I would be curious about that too.

N52 does have an electric water pump.

ninesixtwo · 12-27-2010, 08:27 PM

Quote:

Originally Posted by jaybird124

N52 does have an electric water pump.

thanks! appreciate it.

Coolieman1220 · 12-27-2010, 10:29 PM

My 2009 Audi Q5 had a plastic impeller and Audi is having problems with their water pumps. They replaced it with a metal one.

jaybird124 · 12-27-2010, 10:41 PM

Quote:

Originally Posted by Coolieman1220

My 2009 Audi Q5 had a plastic impeller and Audi is having problems with their water pumps. They replaced it with a metal one.

It's incredible when it seems the manufacturers don't learn from each other's design flaws.

12-27-2010, 02:02 PM	#1
jaybird124 Major 156 Rep 1,046 Posts Drives: 2017 M3 ZCP Join Date: Nov 2005 Location: Florida iTrader: (0)	335d Water Pump Does the 335d have a belt driven or electric water pump? If you notice on Tischer, the diesel pump is significantly cheaper than the other pumps. Wonder what the durability has been with these units as well. __________________ '17 M3 Imola Red/Carbonstructure Cloth, Competition, Lighting, 6MT Retired: '93 325i \|'99 Jeep Wrangler Sport \|'06 330i Sport \|'08 335i Sport \|'08 328i Sport \|'09 335d Sport
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12-27-2010, 02:51 PM	#2
Coolieman1220 Banned 73 Rep 1,770 Posts Drives: 2010 335d Join Date: Jul 2010 Location: New York City iTrader: (0)	i'd imagine electric cause its turbo. If the car needs to cool turbos after running it can stay on....
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12-27-2010, 03:22 PM	#3
CirrusSR22 Major 342 Rep 1,325 Posts Drives: BMW Join Date: Apr 2005 Location: Minnesota iTrader: (0)	By the looks of the diagram I would say it's belt driven. http://www.realoem.com/bmw/showparts...65&hg=11&fg=35
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12-27-2010, 03:40 PM	#5
The HACK Midlife Crises Racing Silent but Deadly Class 1821 Rep 5,337 Posts Drives: 2006 MZ4C, 2021 Tesla Model 3 Join Date: Oct 2007 Location: Welcome to Jamaica have a nice day iTrader: (1)	They're mechanical (belt driven). As for longevity between the belt driven pumps and electrical pumps, PHYSICALLY the electrical pumps should last longer, since there's no extra set of bearings for the belt driven portion of the pump. Bearing failure between 80,000-120,000 mile for the mechanical pump is a GIVEN. However, this iteration of the electrical pump seems to be plagued with gremlins. As far as I know, most of the early failures are electrical problems, not mechanical failures. __________________ Sitting on a beat-up office chair in front of a 5 year old computer in a basement floor, sipping on stale coffee watching a bunch of meaningless numbers scrolling aimlessly on a dimly lit 19” monitor.
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12-27-2010, 05:46 PM	#8
fdriller9 Banned 253 Rep 7,089 Posts Drives: '06 AW 330xi Join Date: Mar 2009 Location: North Jersey/Philly/NYC iTrader: (4) Garage List 2006 330xi [6.44]	Yea e46s had problems with the water pump. Many owners had to swap them out around 80-100k. Some even earlier for preventative maintenance. They also replaced the thermostat.
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12-27-2010, 10:29 PM	#13
Coolieman1220 Banned 73 Rep 1,770 Posts Drives: 2010 335d Join Date: Jul 2010 Location: New York City iTrader: (0)	My 2009 Audi Q5 had a plastic impeller and Audi is having problems with their water pumps. They replaced it with a metal one.
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