DIY E90 BMW 328i Coolant Hose replacement (thermostat to cylinder head)

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3 жыл бұрын

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Hey guys, in this video we are gonna be replacing coolant hose from thermostat housing to cylinder head, one of the most common coolant leaks (failures) on N51/N52 engines. Procedure is very similar on all N51/N52 engines which will include 128i, 328i, 528i, X3, X5, Z4, although on X3 and X5 it might a bit more difficult and tighter in some areas.
Thank you for watching

Пікірлер: 74

@tcphoto 3 жыл бұрын

I replaced the flange on my E92 with 130K miles two weeks ago. Funny how it looks fine on the outside but will fall apart as you pull it off, it rots from the inside out.

@robhughes8516 3 жыл бұрын

Awesome video, thank you!

@Zeiten 3 жыл бұрын

Thank you for watching🙌

@kamilgowacki568 2 жыл бұрын

Thank you.

@alexanderpro4630 10 ай бұрын

im having trouble with the o-ring being to big? and cant get it flushed when instilling the new hose. what could i do? get a new oring? i tired to oil it with WD-40 but not luck.

@federicotorresbordils7624 2 жыл бұрын

Hello Mr. Zeiten, Don't you open the purge screw beside the reservoir tap for the electrical pump test in order to take out any air through the cooling system ? Congrats and thank's in advance BimmerN53

@MrXxxvincentxxx Жыл бұрын

thank you zeiten !

@Zeiten Жыл бұрын

You are welcome🙌

@adamv9652 Жыл бұрын

great dyi, did this today and ngl, this took few hours, it was hard to get down there and clamp was in angle which meets the control arm even with smallest wrench, eventually (after I was able to rescue my tools which felt down on engine cover) I was able witch just the socket apply enough force with hands so I turned the clamp just enough upwards so I could loosen it.. even the removing the hose took some time because it felt like it was glued there.. applying so much pressure felt like no good for thermostat and pump connections - everything is fragile after those years anyway I would strongly recommend to just get the plastic MM fitting to cyl head and cut the hose if it fine, and get new clamp on top part

@deondrewright5398 4 ай бұрын

Im going through the example same thing right now bro I still haven’t found my tool that feel yet hopefully I can get it off fine

@adamv9652 4 ай бұрын

I dont have a lift.. I loosened screws on front part of bottom engine cover and was able to stick my hand there and find the tools@@deondrewright5398

@EL1V1Nstl 2 жыл бұрын

Do I need to jack car up and reach the tstat hose clamp from the bottom? I took out coolant expansion, removed air duct, but I can’t get a tool on the bolt from the topside.

@EL1V1Nstl 2 жыл бұрын

On the 335i

@loboend6952 3 жыл бұрын

Good 👍✋

@robertowuor1083 2 жыл бұрын

I need help with my bmw while i was driving it the coolant resevoir just exploded and all the coolant leaked out should o just get a new one amd replace it or should i replace anythimg else

@Zeiten 2 жыл бұрын

Start with expansion tank and see what happens, all other components might be fine or not, bleed the system and keep an eye on water pump

@mbperfection 2 ай бұрын

i did the same to X5 E70 N51 the other day, but my Mcikey mouse seems extremely tight to push in even with lub. after I get it installed, fired up the engine, and leaks..... question, which mickey mouse did you get ? what type of O ring to get if I replace it ? can I use regular plumbing o brings ?

@aristeogonzalez6437 Жыл бұрын

What is the flow of the coolant in that hose? Mine was broken and some pieces missing so im thinking probably i have plastic pieces somewhere

@gail6904 Жыл бұрын

where do the pieces go inside ur waterpump??

@uptownphotography Жыл бұрын

We got the new Mickey Mouse hose on and did the bleed sequence. Unfortunately, we have another leak now. Best I can tell it's one of those two short hoses (One short hose has a very slight elbow type bend and the other short hose is U shaped with a heat shield wrapped around it). Not sure what happened as it seems like a new leak. Perhaps from the repair (which is not really near that area) or maybe there was an air pocket in the system and one of those 2 hoses burst open. Thanks. Philip

@adamv9652 Жыл бұрын

that is water pump area, it needs to be replaced anyway

@gail6904 Жыл бұрын

while i have you..whats the diff between radiator fan switch in bottom E90 hose verses temp coolant sensor above mickey mouse flange?

@Zeiten Жыл бұрын

Just different points of temperature measurements

@gail6904 Жыл бұрын

HELLO ZEN what do u use to LUBRICATE THE NEW RADAITOR ORINGS WITH????? THANKS ALSO ARE THE NEW ALUMINUM VALVE COVERS ANY GOOD?

@Zeiten Жыл бұрын

Just coolant is a good lubricant, stay away from aluminum valve covers, awful fitment, bad design in general

@gail6904 Жыл бұрын

thank u for all ur help..the upper radiator hose went on great but the aftermarket coolant flange was a bear..the oring was too big i think but finally got it..I need to bother you for another question.. MY pick( to remove radiator hose clamps) fell into the black plastic E90 right BELOW hinge for hood LATCH..I cant get it out..the hole is in between both kidney grills but I cant see the part or see any opening in this black plastic funnel-like piece where it fell..any ideas? I dont want it to pierce my radiator or ac condensor...hope u can help ty for the awesome videos!

@gail6904 Жыл бұрын

HEY ZEITEN! Sorry to bother ..fast question ~~~I am replacing the collant temp sensor right above the mickey mouse flange..do i have to bleed the system if i dont drain anything and put the part in really fast? thanks

@Zeiten Жыл бұрын

I’d say yes, but electric coolant pump bleeding in general is not that crucial compared to mechanical pump, in other words i’ve seen cars after major coolant system work done running just fine without bleeding at all (although i strongly advise to bleed the system every time when doing anything coolant related)

@gail6904 Жыл бұрын

@@Zeiten THANKS TO THE BEST MASTER BMW MECHANIC..you helped so much with my car! :) :) :)

@Zeiten Жыл бұрын

Happy to help👍

@bigjohn524 2 жыл бұрын

Awesome content what is that hose called? I have a 330 that is leaking.

@Zeiten 2 жыл бұрын

Thermostat to cylinder head

@uptownphotography Жыл бұрын

Excellent info. QUESTION PLEASE: (I have a 2008 E90 Sedan 335XI, N54 engine)... Would this method be exactly the same for my 2008 E90 N54? Is there any way to detach the lower portion of the hose from underneath the car as I already have the bottom shield off my car. Note: My hose is very similar, but is a slightly different shape the way in bends, than the one you have. Thanks as always. Phil

@Zeiten Жыл бұрын

The general principle is the same although it’s not exactly the same process, still doable from the top and might be easier from the bottom

@uptownphotography Жыл бұрын

@@Zeiten Thanks for the information. Always appreciated. All the best. Phil

@uptownphotography Жыл бұрын

@@Zeiten Thanks for the reply on a N54 type car. My battery is older and I don't own a battery pack. Can I bleed the coolant system with the car running the whole time. (Heater on full temp as you mentioned). If not....Do you start the engine while the system is still in the bleed mode procedure or stop the bleed cycle before starting the engine Thanks. Phil

@Zeiten Жыл бұрын

Start the bleeding and start the car shortly after, you’ll be fine

@gail6904 Жыл бұрын

HEY ZEITEN I have a couple questions in this order #1 I am replacing 328i 2008 UPPER RADIATOR HOSE..how do u remove the bottom HOSE on it and what is that hose called? #2 do i have to drain the entire antifreeze if Im replacing the upper radiator HOSe and the mickey mouse COOLANT FLANGE..FLANGE ONLY I GOT AN ALUMINUM ONE #3 My radiator fan is on as normal when i have my car ac on, but its hot here in Florida..my infrared said upper hose was 200 degrees and i dont see fan coming on when i shut car off and its still hot...what temp does it turn on??? Hope u can answer all three..thanks UR VIDEOS R AWESOME!!!

@Zeiten Жыл бұрын

1) it’s a heater hose, removed just like any other coolant hose on bmw, release the clip 2) no, you can just empty expansion tank, that should minimize the spill 3) don’t overthink it, normal operating temperature is about 98-102 degrees C so about 200-215F

@gail6904 Жыл бұрын

@@Zeiten OH THANKS so much for answering right away I love ur videos I learned so much from u !! On that bottom heater hose connected to the upper radiator hose E90, do u pull it straight off or twist?? and also, when u bleed COOLANT, do u OPEN or CLOSE the COOLANT TANK CAP??? and is a aluminum mickey mouse FLANGE OK to use ??..ty very very much awesome videos!!

@Zeiten Жыл бұрын

Happy to help, all the bmw coolant hoses must be pulled straight, be very careful with upper radiator hose, coolant cap open, and aluminum flange is fine as long as you don’t damage o-ring during installation very common issue

@gail6904 Жыл бұрын

@@Zeiten thank u! wish u lived closer to work on my E90! they should call u the MASTER "ZEN" lol

@timbob987 Жыл бұрын

Good information, camera was one of the worst I've seen

@gail6904 Жыл бұрын

HOW DO U REMOVE THE SILVER CRIMP BANDS ON THE HOSE W/o cutting radiator hose????? THANKS

@Zeiten Жыл бұрын

You don’t, those are quick connect hoses, pull metal bracket up and pull the hose

@gail6904 Жыл бұрын

@@Zeiten sorry to bother but I am reusing the old hose..I'm talking about the silver CLAMPS, not the quick connect s....so i need to get the crimp silver band off somehow..or can Ii cut hose below it..dont know if it will be too short then to reuse...,.the new flange comes with new clamp so that I get but not how to take off old clamp?? ..thanks

@Zeiten Жыл бұрын

Cut where it ends, should be enough you can’t remove it

@gail6904 Жыл бұрын

@@Zeiten thanks so much! have a great day ZEN!

@moisescardonajr388 3 ай бұрын

Currently doing this job as I type this. The O ring on the flange is slightly bigger, anyone have any suggestions on inserting it? I really have to push and I can only manage to get one side on but part of the gasket is out of the flange after it’s screwed back in.

@Zeiten 3 ай бұрын

Get better parts, it won’t work, what brand did you get?

@moisescardonajr388 3 ай бұрын

@@Zeiten the flange I got is Dorman brand. What if I get a different O-ring?

@Zeiten 3 ай бұрын

@moisescardonajr388 doorman is garbage, is metal flange? You probably won’t find proper size o-ring, my recommendation is to replace a hose with rein or genuine

@moisescardonajr388 3 ай бұрын

@@Zeiten Okay, thank you Tim!

@theme721 Жыл бұрын

Just finished this job on my 07 e90. Was pretty easy, but the hose clamp on the bottom was hard

@upsidrive9513 Жыл бұрын

I'm doing the same and I can't get the bottom hose out on the passenger side , it's taking my patience 😂 how did you do it ?

@upsidrive9513 Жыл бұрын

I have the exact same car and year than yours

@theme721 Жыл бұрын

@@upsidrive9513 a very long flat head

@upsidrive9513 Жыл бұрын

@@theme721 yep I confirm, that's what I used too Took me an hour just for that one particular hose ! Thanks for answering man I appreciate , I hope you have a good day

@theme721 Жыл бұрын

@@upsidrive9513 im glad you got it figured out! It took me forever doing that one part too lol