Home Forums Articles How To's FAQ Register
Go Back   Xoutpost.com > BMW SAV Forums > X5 (E53) Forum
Fluid Motor Union
User Name
Password
Member List Premier Membership Search Today's Posts Mark Forums Read

Xoutpost server transfer and maintenance is occurring....
Xoutpost is currently undergoing a planned server migration.... stay tuned for new developments.... sincerely, the management


Reply
 
LinkBack Thread Tools Display Modes
  #10711  
Old 03-15-2019, 12:49 AM
burninator's Avatar
Member
 
Join Date: Jul 2018
Location: Golden, CO
Posts: 120
burninator is on a distinguished road
Put an E70 rear wiper arm on the wife’s 4.8iS
__________________
2003 X5 4.6iS S/C | 2006 X5 4.8iS | 2009 M5 | 2000 Range Rover S/C
Reply With Quote

Sponsored Links

  #10712  
Old 03-15-2019, 08:46 AM
Member
 
Join Date: Oct 2011
Location: NYC
Posts: 4,755
SlickGT1 is on a distinguished road
Quote:
Originally Posted by Attacking Mid View Post
Yes it is. I tried to find where I read about how the cap equalizes the pressure between the rest of the system and the ET. In my futile search, I read a bunch of other contradictory stuff. In the end, I'm still not sure if it accomplishes anything to run the lower pressure cap. Why did BMW spec such a high pressure cap? Surely it wasn't because it was just a nice round number!?

AM.
To get a captive audience for cooling system parts maybe? Who knows. They stopped this 2 bar bullshit as well. It’s just retarded.

Listen, 2 bars is literally 30psi, with 200 degree coolant in rubber hoses. The system also doesn’t run at 30psi. 30 psi is overpressure. That’s when the cap is supposed to release to save the cooling components. There is no way, our systems need to get that high to blow out.

Like stated before. I’ve been running 1.4 for years now, no side effects. 5 years about. Nothing blowing up. And if some indi decides to take it upon themselves to top off your cooling system, you can bet your ass you will be replacing shit with a 2 bar cap.

Oh and while driving, would you rather see steam coming out the cap, and from your hood, or would you be more impressed that the 2 bar cap held its own, while your plastic radiator side blew out under your car and dumped all its shit.

My radiator actually started leaking while I had the 1.4. Cracked at the plastic side seam. So a failure is still possible. Just not dramatic. I still managed to top off and drive from NJ to Brooklyn.

Lots of people saying how they inspect cooling system every week. Yea that’s nice. Hope those people are also inspecting valley pans, hidden seals and soon to fracture expansion tanks.

For me, the 1.4 is a no brainer. There is some dude that was selling 1.2 bar caps. But the 1.4 is direct from bmw and a fraction of the price. But if there was a 1.2 bar cap from them, I promise I wouldn’t flinch when buying it.
__________________
2006 4.8is, Black on White. SOLD Sniff Sniff.

2017 F85 x5m, Black on Red. BEAST MODE


"The older we grow the greater becomes our wonder at how much ignorance one can contain without bursting one's clothes." - Mark Twain

Unlock OBC post 5
Reply With Quote
  #10713  
Old 03-15-2019, 10:02 AM
crystalworks's Avatar
Member
 
Join Date: Jun 2014
Location: SA, TX
Posts: 6,414
crystalworks is on a distinguished road
^I agree. 1.4 sounds more reasonable than 2.0. Glad I happen to have a few e30 caps lying around here. Also need to install my lower temp thermostat before summer gets here. All the cooling system is here in a box so all will get installed then and hopefully the new parts never have to see crazy pressures.
__________________
2005 X5 4.4i Build 04/05 Maintenance/Build Log
Nav, Pano, Sport (Purchased 06/14 w/ 109,000 miles) (Sold 8/15 w/121,000 miles)


2006 X5 4.8is Build 11/05 Maintenance/Build Log
Nav, DSP, Pano, Running Boards, OEM Tow Hitch, Cold Weather Pckg (Purchased 08/15 w/ 90,500 miles)

2010 X5 35d Build 02/10
Nav, HiFi, 6 DVD, Sports Pckg, Cold Weather Pckg, HUD, CAS, Running Boards, Leather Dash, PDC, Pano (Purchased 03/17 w/ 136,120 miles)
Reply With Quote
  #10714  
Old 03-15-2019, 10:07 AM
crystalworks's Avatar
Member
 
Join Date: Jun 2014
Location: SA, TX
Posts: 6,414
crystalworks is on a distinguished road
Quote:
Originally Posted by andrewwynn View Post
I'm pretty sure the coolant res is in the active loop and already pressurized. Not sure how you would vent into a pressure zone. That said I never saw an overflow tube either
BMW used to use a cold fill line and hot fill line. You would fill to cold and then when the system pressurized it would raise to the hot line. They had a vent nipple with a hose venting to atmosphere above the hot line in the event of an over fill or an over pressure event. I never had any appreciation for it until they did away with it.
__________________
2005 X5 4.4i Build 04/05 Maintenance/Build Log
Nav, Pano, Sport (Purchased 06/14 w/ 109,000 miles) (Sold 8/15 w/121,000 miles)


2006 X5 4.8is Build 11/05 Maintenance/Build Log
Nav, DSP, Pano, Running Boards, OEM Tow Hitch, Cold Weather Pckg (Purchased 08/15 w/ 90,500 miles)

2010 X5 35d Build 02/10
Nav, HiFi, 6 DVD, Sports Pckg, Cold Weather Pckg, HUD, CAS, Running Boards, Leather Dash, PDC, Pano (Purchased 03/17 w/ 136,120 miles)
Reply With Quote
  #10715  
Old 03-15-2019, 09:59 PM
andrewwynn's Avatar
Member
 
Join Date: Jun 2015
Location: Racine, WI
Posts: 10,817
andrewwynn will become famous soon enough
So the point of 2bar is to keep the coolant liquid.

Although coolant certainly has a higher boiling point than water, for water these are the numbers:

At 2 bar, water boils at 120C (248F), just about the max operating temp of X5

At 1.4 bar, water boils at 109.44c (229F)

So the issue is: if the car gets to 110C, it will vent with 1.4 cap. That could be a good thing by giving you the obvious sign that it's running hot but 110 is barely over temp.

I still won't deny the logic of keeping all those mentioned 20 yr old parts at a substantially lower pressure, and the only time I've seen an x5 > 110c was when the ET split wide open and dumped the coolant.


Sent from my iPhone using Tapatalk Pro
__________________
2011 E70 • N55 (me)
2012 E70 • N63 (wife)
Reply With Quote
  #10716  
Old 03-15-2019, 10:31 PM
Member
 
Join Date: Oct 2011
Location: NYC
Posts: 4,755
SlickGT1 is on a distinguished road
Quote:
Originally Posted by andrewwynn View Post
So the point of 2bar is to keep the coolant liquid.

Although coolant certainly has a higher boiling point than water, for water these are the numbers:

At 2 bar, water boils at 120C (248F), just about the max operating temp of X5

At 1.4 bar, water boils at 109.44c (229F)

So the issue is: if the car gets to 110C, it will vent with 1.4 cap. That could be a good thing by giving you the obvious sign that it's running hot but 110 is barely over temp.

I still won't deny the logic of keeping all those mentioned 20 yr old parts at a substantially lower pressure, and the only time I've seen an x5 > 110c was when the ET split wide open and dumped the coolant.


Sent from my iPhone using Tapatalk Pro
Truth. But we run bmw magic blue coolant as well. So that brings the boiling temp up. Even not at equal 50-50 mix, the temp will be decently over max operating temp. I know I’m not losing coolant, so I feel safe with it.
__________________
2006 4.8is, Black on White. SOLD Sniff Sniff.

2017 F85 x5m, Black on Red. BEAST MODE


"The older we grow the greater becomes our wonder at how much ignorance one can contain without bursting one's clothes." - Mark Twain

Unlock OBC post 5
Reply With Quote
  #10717  
Old 03-15-2019, 10:32 PM
andrewwynn's Avatar
Member
 
Join Date: Jun 2015
Location: Racine, WI
Posts: 10,817
andrewwynn will become famous soon enough
Unless you vent it's a good plan.
__________________
2011 E70 • N55 (me)
2012 E70 • N63 (wife)
Reply With Quote
  #10718  
Old 03-15-2019, 11:02 PM
Member
 
Join Date: Jan 2018
Location: Northern Michigan
Posts: 49
FastEddie313 is on a distinguished road
Quote:
Originally Posted by andrewwynn View Post
I was contemplating doing the exact same thing a week ago. I knew it was possible but I was removing the lock actuator to make it freeze resistant and once that is out it's painfully simple to remove the DHC. Good to have the confirmation though


Sent from my iPhone using Tapatalk Pro

I didn't remove the lock actuator but rather the lock cylinder the key goes into because it was in the way of the top clip unclipping from the cable support..

I put some T6 on things that moved in there and now the BMW handle feels like a Rolls handle..


On the subject of these cooling systems, why do these BMW engines have to be so scary?

You would think that with all of the wires they put in these cars they could have put in a coolant system pressure sensor to throw a big warning on the dash if it ever drastically decreased or something..


How do these things usually blow?
Do you have time to see steam or any warning before your engine blows a HG or cracks the head if you aren't constantly staring at the temp gauge?
Do you even notice before its too late?
__________________
06 3.0 X5 auto 103k - 95 M3 - 01 RS25 - 80 931
Reply With Quote
  #10719  
Old 03-15-2019, 11:47 PM
andrewwynn's Avatar
Member
 
Join Date: Jun 2015
Location: Racine, WI
Posts: 10,817
andrewwynn will become famous soon enough
The temp gauge on x5 is useless. By the time it ever moves it's too late and usually means a catastrophic failure of some part usually the coolant reservoir.

There is a way to turn the non gauge been into a gauge.

Usually I notice a problem when it's cold outside and I get no cabin heat because the t-stat fails open. Unfortunately if that part faults in summer you might drive a few thousand miles in open loop running rich. I'll like to put scanner on and drive with Realtime temp display at least monthly
__________________
2011 E70 • N55 (me)
2012 E70 • N63 (wife)
Reply With Quote
  #10720  
Old 03-16-2019, 10:10 AM
crystalworks's Avatar
Member
 
Join Date: Jun 2014
Location: SA, TX
Posts: 6,414
crystalworks is on a distinguished road
Quote:
Originally Posted by FastEddie313 View Post
How do these things usually blow?
Do you have time to see steam or any warning before your engine blows a HG or cracks the head if you aren't constantly staring at the temp gauge?
Do you even notice before its too late?
It depends what E53 you are talking about. High level clusters in equipped cars will give you a low coolant warning likely well before the engine over heats. That's how I caught my expansion tank crack hemorrhage before doing any damage to the N62. From what I have read though, lower equipped M54 vehicles weren't equipped with a coolant level sensor or a light in the cluster to notify of low coolant. Pretty dumb if you ask me as EVERY other BMW I have ever seen has a coolant warning light + sensor at the bare minimum.
__________________
2005 X5 4.4i Build 04/05 Maintenance/Build Log
Nav, Pano, Sport (Purchased 06/14 w/ 109,000 miles) (Sold 8/15 w/121,000 miles)


2006 X5 4.8is Build 11/05 Maintenance/Build Log
Nav, DSP, Pano, Running Boards, OEM Tow Hitch, Cold Weather Pckg (Purchased 08/15 w/ 90,500 miles)

2010 X5 35d Build 02/10
Nav, HiFi, 6 DVD, Sports Pckg, Cold Weather Pckg, HUD, CAS, Running Boards, Leather Dash, PDC, Pano (Purchased 03/17 w/ 136,120 miles)
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On





All times are GMT -4. The time now is 02:59 PM.
vBulletin, Copyright 2024, Jelsoft Enterprises Ltd. SEO by vBSEO 3.6.0
© 2017 Xoutpost.com. All rights reserved. Xoutpost.com is a private enthusiast site not associated with BMW AG.
The BMW name, marks, M stripe logo, and Roundel logo as well as X3, X5 and X6 designations used in the pages of this Web Site are the property of BMW AG.
This web site is not sponsored or affiliated in any way with BMW AG or any of its subsidiaries.