[mdevegas]

In the process of replacing my pump + thermostat on my '07 e92, everything was going smoothly until the re-installment of the thermostat.

I'm stuck on the larger quick-disconnect hose on the front of the thermostat...I can't get it to seat all the way on the thermostat. I have no idea what to do at this point since I can't move the hose and moving the thermostat isn't helping. Is there any pictures on how that fitting is supposed to be seated on the thermostat?

[Built My Way]

Originally Posted by mdevegas

In the process of replacing my pump + thermostat on my '07 e92, everything was going smoothly until the re-installment of the thermostat.

I'm stuck on the larger quick-disconnect hose on the front of the thermostat...I can't get it to seat all the way on the thermostat. I have no idea what to do at this point since I can't move the hose and moving the thermostat isn't helping. Is there any pictures on how that fitting is supposed to be seated on the thermostat?

Did you check to see that you have the correct thermostat? If it is the correct part, make sure nothing is obstructing the connection. Lubricate the o-ring on the hose with a bit of coolant. Normally you would shove the spring clip back down into the locking position before connecting the hose so instead, try pushing the hose onto the thermostat first before positioning the spring clip. Be sure the the locking notches on the thermostat line up with the clip.

The best picture I have is one titled Hose Connections (photo 10). See Hose #2.

You need to grab both the hose and thermostat at the same time. Not much room but it is doable. Not sure what else I can suggest.

[mdevegas]

Originally Posted by Built My Way

Did you check to see that you have the correct thermostat? If it is the correct part, make sure nothing is obstructing the connection. Lubricate the o-ring on the hose with a bit of coolant. Normally you would shove the spring clip back down into the locking position before connecting the hose so instead, try pushing the hose onto the thermostat first before positioning the spring clip. Be sure the the locking notches on the thermostat line up with the clip.

The best picture I have is one titled Hose Connections (photo 10). See Hose #2.

You need to grab both the hose and thermostat at the same time. Not much room but it is doable. Not sure what else I can suggest.

After reading the comments on the BavAuto videos, I put some oil on both the connections and managed to get it on there with the help of a screwdriver. Got everything patched up and done. Feels good to be done!

[rome5982]

Great thread, thanks for the DIY and the video link. Just finished replacing the thermostat (97K miles), 2007 E92 coupe. Going to wait and replace the pump in another year or two - or sooner if it fails. The only hard part was getting the clip connection hoses off.....that was a major pain in the A.......at least 1 hour for each of those two connections. Didn't want to break anything. Finally after wiggling and slow prying with screw driver I was able to get those off (very cramped spaces). I wound up removing the radiator fan/shroud assembly to get more space. Putting the new one in was a breeze, especially after applying some silicone to the housing fittings. Better than $1000 - $1400 cost from a dealer.

[igell]

My 335 now has 80k.. I got the thermastat light so decided to do waterpump at the same time. I know there are are also 4 rubber hoses in the same location. Should I replace those as well, or should i just do the upper and lower rad hoses?

[Built My Way]

Originally Posted by igell

My 335 now has 80k.. I got the thermastat light so decided to do waterpump at the same time. I know there are are also 4 rubber hoses in the same location. Should I replace those as well, or should i just do the upper and lower rad hoses?

Are the hoses swollen or cracked? Remove the splash guard and take the car out for a run to heat up the coolant. Get underneath and squeeze the hoses while still warm. They should be firm. They shouldn't be hard or squishy/soft.

If the condition is difficult to diagnose then go ahead and get 'er done anyway. Hoses are not that expensive.

[agentkennethwang]

I have a 2007 328xi and I'm in the middle of doing this now by following the Youtube video (

) and I'm stuck 6 minutes into the video. It's more difficult to follow since the car in the video isn't the exact same so I have to make modifications. 6 minutes in, the guy loosens the first hose which I'm having trouble doing. There is a big metal part that looks like part of the car's frame that is in the way of the hose. What can I do? Thanks!

[Saintor]

Originally Posted by Built My Way

If the condition is difficult to diagnose then go ahead and get 'er done anyway. Hoses are not that expensive.

*Not my experience*.

My dealer called me back that I needed a new 516414 hose. 233$C (120US$ on realoem) + 1 hour.

Item #3
11537516414
http://www.realoem.com/bmw/enUS/show...55#11537516414

The worst part is that the stainless section (80% of the hose) was just fine; the swollen rubber section was only 3"....

['02onthebrain]

Thanks for this write up and to Bavauto. I did my water pump and t-stat on my e90 335xi this weekend and I could not have tackled it without these. A bit of a PITA, but I avoided a coolant bath and got everything back together.

[ParmSingh]

great write up

[geronimo]

Quick question, has anybody ordered the kit from ECS tuning? I used them primarily with my VW.

http://www.ecstuning.com/BMW-E92-335...ater_Pump_Kit/

Is it better to go with the lower temp thermostat?

Thanks!

[modern_citizen24]

I have a question also i have a 2007 335i AT with intercooler. Is it a must to rempve waterpump in order to replace thermostat? Have a new waterpump but have to replace thermostat thanks

[Built My Way]

Originally Posted by modern_citizen24

I have a question also i have a 2007 335i AT with intercooler. Is it a must to rempve waterpump in order to replace thermostat? Have a new waterpump but have to replace thermostat thanks

No, just follow the DIY and leave out the waterpump section (steps 17 to 30).

[Built My Way]

Originally Posted by geronimo

Quick question, has anybody ordered the kit from ECS tuning? I used them primarily with my VW.

http://www.ecstuning.com/BMW-E92-335...ater_Pump_Kit/

Is it better to go with the lower temp thermostat?

Thanks!

Try asking in the General Discussions sections.

[MadeInPhilly]

I just replaced mine tonight. New waterpump/bolts and thermostat.

Here is my thread. Attached is a pic of the socket extension I used for future installers on the top bolt access. If you do not have a E torx set you can use a 10mm or 13/32" socket which fits fine over the E12 bolt. Removing the plastic hardline from the thermostat gives extra room. I recommend this. After doing this install once I think I can do the total job in less than 2 hours.

[geronimo]

Originally Posted by Built My Way

Try asking in the General Discussions sections.

i stuck with a stock thermostat. part of the reason was also because the mishimoto thermostat i bought in my kit was defective in box

['02onthebrain]

Another suggestion I would like to add after doing this procedure twice and then replacing my radiator is to perform the bleed cycle twice. The first bleed cycle did not get all of the air out and I ended up blowing the vent screw in the expansion tank!

[cya]

Thank you for DIY without it I would not be able to do my own water pump and thermostat. Would reccommend anyone to give it a try themselves as it was pretty simple and straight forward.

[jacobniell]

Hi there

I am not quilte clear on what kind of new aluminum bolts should be user when having the water pump with no rubber isolators?

Should it be 11-51-0-392-553
Or should it be 11-51-7-602-123

Or something else?

Thanks for helping out here...

[Built My Way]

Originally Posted by jacobniell

Hi there

I am not quilte clear on what kind of new aluminum bolts should be user when having the water pump with no rubber isolators?

Should it be 11-51-0-392-553
Or should it be 11-51-7-602-123

Or something else?

Thanks for helping out here...

You'll need the shorter bolts. (p/n 11-51-7-602-123)

[jacobniell]

Originally Posted by Built My Way

You'll need the shorter bolts. (p/n 11-51-7-602-123)

Thanks for the quick reply.

You are sure they are not too short?

I read about people used the long 32 mm bolts and cut the top one. On the video it is also the long ones used... That is why I was confused ;0)

It would be nice if the different bolts, pumps and thermostats used in the first post was accompanied with item numbers

Thanks again

[Built My Way]

Originally Posted by jacobniell

Thanks for the quick reply.

You are sure they are not too short?

I read about people used the long 32 mm bolts and cut the top one. On the video it is also the long ones used... That is why I was confused ;0)

It would be nice if the different bolts, pumps and thermostats used in the first post was accompanied with item numbers

Thanks again

If all you have on hand are the long bolts then yes, you will need to shorten the upper one by 1/8". Best to use the proper ones though.