Water Pump and Thermostat Replacement question

[hapoom50]

Has anyone replaced water pump/thermostat for e89 N54?
I've done e90 335i, but seems like Z4 has less clearance to get water pump out. Do I need to remove power steering? or remove radiator fan and replace water pump between radiator and sub frame?
Please let me know, thanks
2012 Z4 35is

[jparnes1]

Www.newtis.info

[hapoom50]

thx for the reply but couldn't find section how to get water pump out.
anyone done water pump and thermostat replacement for Z4 w/ N54?
any advise would be appreciated

[BuddhaPilot]

Here's a YT on the E85 that might give you some ideas as the cars aren't that different space-wise in that area. I've watched one on the E89 but can't find it right now.

[jparnes1]

Originally Posted by hapoom50

thx for the reply but couldn't find section how to get water pump out.
anyone done water pump and thermostat replacement for Z4 w/ N54?
any advise would be appreciated

https://www.newtis.info/tisv2/a/en/e...drive/8IgJHhG1

Click all the links in the preliminary work section.

[Xpuzzle]

Resurrecting this thread.

hapoom50 Did you ever get a chance to replace your water pump & thermostat? I am curious to know if you had to drop the steering rack to get more space to pull out the pump. Appreciate any tips/tricks you can share.

[jparnes1]

Originally Posted by Xpuzzle

Resurrecting this thread.

hapoom50 Did you ever get a chance to replace your water pump & thermostat? I am curious to know if you had to drop the steering rack to get more space to pull out the pump. Appreciate any tips/tricks you can share.

You can detach some hoses from below, but Both the tstat and pump come out from above because of the rack. It's a bitch. Remove fan, radiator, expansion tank, cross brace (runs in front of the engine), try to loosen clamps that are clocked in the worst locations, all in a very small space.

[Xpuzzle]

Thanks Jparnes

[CarAbuser]

Originally Posted by jparnes1

You can detach some hoses from below, but Both the tstat and pump come out from above because of the rack. It's a bitch. Remove fan, radiator, expansion tank, cross brace (runs in front of the engine), try to loosen clamps that are clocked in the worst locations, all in a very small space.

I've read the procedure on newtis for this. (https://www.newtis.info/tisv2/a/en/e...drive/8IgJHhG1)

It doesn't look like a big deal from those instructions. I'm guessing there's more to it since you're the second person to tell me this is a hard job.

[jparnes1]

TIS tells you what do to but not how to do it. I'm not saying you can't do it. I am saying that hose clamps are clocked in the worst positions, the space is super tight, and the pump is connected to a hard line from the turbo with maybe a 4" length of rubber hose between. Not much wiggle room there.

[Bob20124]

Question: Is it advisable to be proactive or wait for failure before changing tstat and pump?

Car is 2011 35i 3/10 build date, 65,500 miles. Coolant changed every 3 yrs. Average 5-7Kmi a year.

[jparnes1]

Originally Posted by Bob20124

Question: Is it advisable to be proactive or wait for failure before changing tstat and pump?

Car is 2011 35i 3/10 build date, 65,500 miles. Coolant changed every 3 yrs. Average 5-7Kmi a year.

That's a tough call. Because these cars will go into limp mode if they overheat, you pretty much can't do any real damage to the engine. I take my car on very long trips and I don't want to get stranded. So for me preventive replacement makes sense. Plus I get to do the work and not pay big bucks at the shop. In general, replace the tstat, pump, rad, expansion tank, belt and tensioners somewhere between 60 and 90k. I did the tstat and pump at 70 and will do the rest next year when I'm due for a coolant flush.

[Bob20124]

Originally Posted by jparnes1

That's a tough call. Because these cars will go into limp mode if they overheat, you pretty much can't do any real damage to the engine. I take my car on very long trips and I don't want to get stranded. So for me preventive replacement makes sense. Plus I get to do the work and not pay big bucks at the shop. In general, replace the tstat, pump, rad, expansion tank, belt and tensioners somewhere between 60 and 90k. I did the tstat and pump at 70 and will do the rest next year when I'm due for a coolant flush.

Thanks Jay, I'm due a coolant change next year. I'll try to do it at a DIY. Safe trip and enjoy Zfest if your going, we won't be able make it this year.