Welcome to Bimmerfest -- The #1 Online Community for BMW related information! Please enjoy the discussion forums below and share your experiences with the 200,000 current, new and past BMW owners. The forums are broken out by car model and into other special interest sections such as BMW European Delivery and a special forum to voice your questions to the many BMW dealers on the site to assist our members!

Please follow the links below to help get you started!

Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 7 Series / 8 Series > 7 Series - E65 / E66 (2002 - 2008)

7 Series - E65 / E66 (2002 - 2008)
Discussion pertaining to the flagship BMW here.

Reply
 
Thread Tools Display Modes
  #176  
Old 09-05-2013, 03:50 PM
KingSilverback KingSilverback is online now
The Silverback
Location: Wisconsin
 
Join Date: Feb 2012
Posts: 450
Mein Auto: 2006 750Li
Re: BMW 90C Thermostat For N62, N63, N73 Engines

Quote:
Originally Posted by Thesatman View Post
Sorry I didn't take a picture...if I take it out to do the other test of the drilled stock one then I will. With all the swapping, I'm out of BMW coolant at the moment though....

And I'm not getting in the middle of any immature pissing contests either. This forum should be to share knowledge and experience...not to bash or berate others.
Hows the cars performance now? Have you tried pushing her a little?

Sent from BimmerApp mobile app
Reply With Quote
  #177  
Old 09-05-2013, 06:35 PM
Eric01525i Eric01525i is offline
Registered User
Location: N. Indiana
 
Join Date: Apr 2012
Posts: 8
Mein Auto: 745LI
I know i am junping in late, but i did buy the stst. and nothing but good luck for me. Constsnt 93-96c a/c on or off 75-80f outdoor temp.
B4 swap i was getting 101-104c
Reply With Quote
  #178  
Old 09-05-2013, 07:26 PM
KingSilverback KingSilverback is online now
The Silverback
Location: Wisconsin
 
Join Date: Feb 2012
Posts: 450
Mein Auto: 2006 750Li
Re: BMW 90C Thermostat For N62, N63, N73 Engines

Quote:
Originally Posted by Eric01525i View Post
I know i am junping in late, but i did buy the stst. and nothing but good luck for me. Constsnt 93-96c a/c on or off 75-80f outdoor temp.
B4 swap i was getting 101-104c
And more good news! What other differences have you noticed since the mod?

Sent from BimmerApp mobile app

Last edited by KingSilverback; 09-05-2013 at 07:40 PM.
Reply With Quote
  #179  
Old 09-05-2013, 09:13 PM
Eric01525i Eric01525i is offline
Registered User
Location: N. Indiana
 
Join Date: Apr 2012
Posts: 8
Mein Auto: 745LI
engine seems like it maintained hp when fully heated up. You know, like when you first take off in the morning, full of pep!!
Reply With Quote
  #180  
Old 09-06-2013, 10:43 AM
ssdriver27 ssdriver27 is offline
Officially Welcomed to the 'Fest
Location: Washington
 
Join Date: Aug 2013
Posts: 230
Mein Auto: 2003 745LI Alpine White
Quote:
Originally Posted by Eric01525i View Post
I know i am junping in late, but i did buy the stst. and nothing but good luck for me. Constsnt 93-96c a/c on or off 75-80f outdoor temp.
B4 swap i was getting 101-104c
going from a 105 to a 90 degree thermostat is a difference of 15 degrees (correct me if Im wrong) you should be seeing 85 to 90 no more then 90 as this is the temp the tstat is rated to open. but if you are consistant whether on highway or in city and you are getting those temps and you notice a difference in pep thats great.... Sorry if I seem negative Im just still mad about the price and quality of this part adn the fact mine is not working correctly. Im seeing 96 - 98 on highway (should be 85 - 90) in 60F outside temps. $120.00 plus 30.00 for coolant for 5 degrees cooler temps ...............
Reply With Quote
  #181  
Old 09-06-2013, 11:40 AM
KingSilverback KingSilverback is online now
The Silverback
Location: Wisconsin
 
Join Date: Feb 2012
Posts: 450
Mein Auto: 2006 750Li
Re: BMW 90C Thermostat For N62, N63, N73 Engines

Quote:
Originally Posted by ssdriver27 View Post
going from a 105 to a 90 degree thermostat is a difference of 15 degrees (correct me if Im wrong) you should be seeing 85 to 90 no more then 90 as this is the temp the tstat is rated to open. but if you are consistant whether on highway or in city and you are getting those temps and you notice a difference in pep thats great.... Sorry if I seem negative Im just still mad about the price and quality of this part adn the fact mine is not working correctly. Im seeing 96 - 98 on highway (should be 85 - 90) in 60F outside temps. $120.00 plus 30.00 for coolant for 5 degrees cooler temps ...............
You my friend have a problem somewhere in your cooling system if you're seeing temps that high on highway. Like I said at the beginning of all this, the thermostat won't do anything for you if you already have a leak or something already wrong with your cooling system. Get your car checked out or simply get a refund.

Sent from my SPH-L710 using BimmerApp mobile app

Last edited by KingSilverback; 09-06-2013 at 11:50 AM.
Reply With Quote
  #182  
Old 09-06-2013, 12:59 PM
First_745Li's Avatar
First_745Li First_745Li is offline
Officially Welcomed to the 'Fest
Location: South FL
 
Join Date: Jun 2012
Posts: 2,206
Mein Auto: '03 745Li
Quote:
Originally Posted by ssdriver27 View Post
going from a 105 to a 90 degree thermostat is a difference of 15 degrees (correct me if Im wrong) you should be seeing 85 to 90 no more then 90 as this is the temp the tstat is rated to open. but if you are consistant whether on highway or in city and you are getting those temps and you notice a difference in pep thats great.... Sorry if I seem negative Im just still mad about the price and quality of this part adn the fact mine is not working correctly. Im seeing 96 - 98 on highway (should be 85 - 90) in 60F outside temps. $120.00 plus 30.00 for coolant for 5 degrees cooler temps ...............
ssdriver,

I agree with you.. the quality is ehhhh!.That's why KingSilverBack recommended the element swap from the beginning...Is it worth $120 to have a difference of 5-6 degrees? No.
What you should understand is that if your cooling system has no issues, sealed with no leaks then you'd see results like KingSilverBack and a couple of others have reported. However, if you have issues within your cooling system you won't get the desired results we all hope for. I'll tell you my story...

As you are aware, I installed the lower temp tstat, my temps are at 100C at idle... I too was pissed. Shouldn't be... right? Ok well I decided to get a second opinion from another INDY, and mentioned something I've noticed a while now - after driving 40 mins in traffic I can still grab the lower radiator hose and not get burned, this shouldn't be the case..

Had my car checked out this morning, here's what they found:

1. Pressure tested - no leaks
2. Good flow with some hot spots
3. Thermostat functions - fine
4. Upper Hose temp - 204F
5. Lower Hose temp - 135F


Diagnosis:
Collapsing or Failing Radiator

Based on the evaluation, I believe when I replace the radiator I should see major improvements on the temp... as long as there's nothing else wrong with the cooling system. I plan to get this repaired some time next week and will post up the outcome. I strongly recommend getting your car check out like I did.
__________________


'11 328i
'07 Audi A8 (w/ 20,000 miles)
'03 745Li (sold)
'03 Acura TL-S
'02 Infiniti QX4 (sold )

For those like that love INK checkout join
Myinkedspace.com with my referral code and enjoy

http://myinkedspace.com/?ref=REF65900

Last edited by First_745Li; 09-06-2013 at 01:01 PM. Reason: spelling
Reply With Quote
  #183  
Old 09-06-2013, 01:09 PM
GeoX750Li's Avatar
GeoX750Li GeoX750Li is offline
Officially Welcomed to the 'Fest
Location: Chicago, IL
 
Join Date: Apr 2013
Posts: 656
Mein Auto: 2010 750Li X-Drive
Quote:
Originally Posted by First_745Li View Post
ssdriver,

I agree with you.. the quality is ehhhh!.That's why KingSilverBack recommended the element swap from the beginning...Is it worth $120 to have a difference of 5-6 degrees? No.
What you should understand is that if your cooling system has no issues, sealed with no leaks then you'd see results like KingSilverBack and a couple of others have reported. However, if you have issues within your cooling system you won't get the desired results we all hope for. I'll tell you my story...

As you are aware, I installed the lower temp tstat, my temps are at 100C at idle... I too was pissed. Shouldn't be... right? Ok well I decided to get a second opinion from another INDY, and mentioned something I've noticed a while now - after driving 40 mins in traffic I can still grab the lower radiator hose and not get burned, this shouldn't be the case..

Had my car checked out this morning, here's what they found:

1. Pressure tested - no leaks
2. Good flow with some hot spots
3. Thermostat functions - fine
4. Upper Hose temp - 204F
5. Lower Hose temp - 135F


Diagnosis:
Collapsing or Failing Radiator

Based on the evaluation, I believe when I replace the radiator I should see major improvements on the temp... as long as there's nothing else wrong with the cooling system. I plan to get this repaired some time next week and will post up the outcome. I strongly recommend getting your car check out like I did.
Really, they say you have a bad radiator?

Bring back Sfbay, I want to know what he thinks.
Reply With Quote
  #184  
Old 09-06-2013, 01:44 PM
First_745Li's Avatar
First_745Li First_745Li is offline
Officially Welcomed to the 'Fest
Location: South FL
 
Join Date: Jun 2012
Posts: 2,206
Mein Auto: '03 745Li
lol....i know right.. You think different?
__________________


'11 328i
'07 Audi A8 (w/ 20,000 miles)
'03 745Li (sold)
'03 Acura TL-S
'02 Infiniti QX4 (sold )

For those like that love INK checkout join
Myinkedspace.com with my referral code and enjoy

http://myinkedspace.com/?ref=REF65900
Reply With Quote
  #185  
Old 09-06-2013, 02:10 PM
PAPER's Avatar
PAPER PAPER is offline
CRISP & CLEAN
Location: CALIFORNIA L.A.
 
Join Date: Jul 2009
Posts: 2,911
Mein Auto: 745LI
Quote:
Originally Posted by First_745Li View Post
lol....i know right.. You think different?
your radiator could be bad . It could be clogged or to much build up in it .
__________________

If you need a Custom 2014 DVD Navigation Map
East or West for your E65 E66 PM me for price .
Or if you Need an AUX Plug for your car hit me up
Reply With Quote
  #186  
Old 09-06-2013, 02:16 PM
GeoX750Li's Avatar
GeoX750Li GeoX750Li is offline
Officially Welcomed to the 'Fest
Location: Chicago, IL
 
Join Date: Apr 2013
Posts: 656
Mein Auto: 2010 750Li X-Drive
Quote:
Originally Posted by First_745Li View Post
lol....i know right.. You think different?
I don't remember reading your engine temps were that high, just not in line with the 90C tstat. Did you have any collapsed hoses, that could be sign of a blocked radiator?
Reply With Quote
  #187  
Old 09-06-2013, 03:07 PM
First_745Li's Avatar
First_745Li First_745Li is offline
Officially Welcomed to the 'Fest
Location: South FL
 
Join Date: Jun 2012
Posts: 2,206
Mein Auto: '03 745Li
BMW 90C Thermostat For N62, N63, N73 Engines

Just saw it at 100 this morning.


Sent from BimmerApp mobile app
__________________


'11 328i
'07 Audi A8 (w/ 20,000 miles)
'03 745Li (sold)
'03 Acura TL-S
'02 Infiniti QX4 (sold )

For those like that love INK checkout join
Myinkedspace.com with my referral code and enjoy

http://myinkedspace.com/?ref=REF65900
Reply With Quote
  #188  
Old 09-06-2013, 03:34 PM
ssdriver27 ssdriver27 is offline
Officially Welcomed to the 'Fest
Location: Washington
 
Join Date: Aug 2013
Posts: 230
Mein Auto: 2003 745LI Alpine White
Thanks again First. gives me hope. I will check mine out more this weekend. Believe me when I say I want to give praise on this part. just need to get mine to work. I will look into it more this weekend. Im leaning towards it being clogged though rather then colapsing, could be the reason you mentioned low return stream after install of the new stat ........
Reply With Quote
  #189  
Old 09-06-2013, 03:54 PM
First_745Li's Avatar
First_745Li First_745Li is offline
Officially Welcomed to the 'Fest
Location: South FL
 
Join Date: Jun 2012
Posts: 2,206
Mein Auto: '03 745Li
BMW 90C Thermostat For N62, N63, N73 Engines

Quote:
Originally Posted by GeoX750Li View Post
I don't remember reading your engine temps were that high, just not in line with the 90C tstat. Did you have any collapsed hoses, that could be sign of a blocked radiator?
Both hoses look good.


Sent from BimmerApp mobile app
__________________


'11 328i
'07 Audi A8 (w/ 20,000 miles)
'03 745Li (sold)
'03 Acura TL-S
'02 Infiniti QX4 (sold )

For those like that love INK checkout join
Myinkedspace.com with my referral code and enjoy

http://myinkedspace.com/?ref=REF65900
Reply With Quote
  #190  
Old 09-06-2013, 05:12 PM
GeoX750Li's Avatar
GeoX750Li GeoX750Li is offline
Officially Welcomed to the 'Fest
Location: Chicago, IL
 
Join Date: Apr 2013
Posts: 656
Mein Auto: 2010 750Li X-Drive
100C is not really high for our cars. If your car can maintain that coolant temp for a long drive on a hot day, it seems your radiator is working.

Our engine temperatures depend on a lot of things. I drove home in stop and go highway traffic tonight. My coolant temp was 87C to 90C the entire drive. This is with the stock thermostat. Oil temp was 105C.
Reply With Quote
  #191  
Old 09-08-2013, 05:37 PM
First_745Li's Avatar
First_745Li First_745Li is offline
Officially Welcomed to the 'Fest
Location: South FL
 
Join Date: Jun 2012
Posts: 2,206
Mein Auto: '03 745Li
BMW 90C Thermostat For N62, N63, N73 Engines

Before I jump into these repairs, I PMd BMWOEM1 to see how he would handle it. Waiting on his reply.


Sent from BimmerApp mobile app
__________________


'11 328i
'07 Audi A8 (w/ 20,000 miles)
'03 745Li (sold)
'03 Acura TL-S
'02 Infiniti QX4 (sold )

For those like that love INK checkout join
Myinkedspace.com with my referral code and enjoy

http://myinkedspace.com/?ref=REF65900
Reply With Quote
  #192  
Old 09-09-2013, 02:16 AM
dolfan13's Avatar
dolfan13 dolfan13 is offline
Officially Welcomed to the 'Fest
Location: lexington,ky usa
 
Join Date: Jan 2011
Posts: 828
Mein Auto: 545i
Just because a tstat opens at a certain temp that dosnt mean you'll run at that temp.Your car will run at a certain temp with no tsat right?Good test would be to remove element altogether in 85f weather ,stop and go and see what the engine maintains.Some cars depending on problems will still over heat.By the way going from 105C -108C to 95C-98C is a LARGE drop.Almost 20F.
Reply With Quote
  #193  
Old 09-09-2013, 06:19 AM
745iguy's Avatar
745iguy 745iguy is offline
Besessen Deutsch Autos
Location: Massachusetts
 
Join Date: Apr 2012
Posts: 1,133
Mein Auto: 2006 X5 3.0
BMW 90C Thermostat For N62, N63, N73 Engines

Quote:
Originally Posted by dolfan13 View Post
Just because a tstat opens at a certain temp that dosnt mean you'll run at that temp.Your car will run at a certain temp with no tsat right?Good test would be to remove element altogether in 85f weather ,stop and go and see what the engine maintains.Some cars depending on problems will still over heat.By the way going from 105C -108C to 95C-98C is a LARGE drop.Almost 20F.
I think some people largely underestimate the even 10C (18F from 105c/221f to 95c/203f)difference. The fact the pressure will be lower so less stress on cooling components so extended service life on that side plus lower engine temps which will appease a plethora of issues with the cheap rubber and thermoplastics in the engine bay.
All that being said i am certainly disappointed with the quality of the product and it is a shame that if he was being honest (why make it up) that even he paid 50 a peice for these if i had gotten them all flimsy with the connector the wrong way id have sent them back and demanded to either fix it and compensate me or refund my money who wants 100 incorrectly manufactured tstats? Its great that you can hybrid them and it will work fine however it is a little too late for most these cars unless maybe you have a facelift with less than 40-50k(even thats pushing it)on it the heat damage has probably already taken its toll on the seals and cooling system and your best bet would probably still involve an engine reseal and cooling system overhaul and THEN the tstat will show its full effectiveness on the longevity of the engine and it's seals and plastic parts, and of course the added "peppiness" is a plus too.
If the n63 & n63tu guys do this now it would be interesting to see how well the new cars with a modified lower temp stat compare with reliability to stock temp cars. But as far as i can tell this doesn't feign much interest in the newer model forums.



Sent from BimmerApp mobile app
__________________

06 X5 3.0 Toledo Blue Metallic/Light Beige 2:
Adaptive Xenon Headlamps, Panoramic Sunroof, Rear Sunshades,
+Factory Aux Input in Ashtray, Bluetooth, Rear PDC Sensors, Rear Electronic Adjustable Seat Backs,
+White Angel Eye LEDs, +5000k LED H11 Foglights, +Blacked Out Chrome Grill Surround, +Puddle Light Logo Projector
.. more updates to come

PREVIOUS 2002 745i

Last edited by 745iguy; 09-09-2013 at 06:24 AM.
Reply With Quote
  #194  
Old 09-09-2013, 07:14 AM
Thesatman Thesatman is offline
Officially Welcomed to the 'Fest
Location: Albuquerque, NM
 
Join Date: Mar 2013
Posts: 333
Mein Auto: 2008 750LI
Quote:
Originally Posted by KingSilverback View Post
Hows the cars performance now? Have you tried pushing her a little?

Sent from BimmerApp mobile app
Yeah...there is probably a small HP gain as expected. My check engine light is back though. Says basically the DME control loop for the thermostat is open. If I can pick up a couple stock thermostats for not too much I may try a couple other tests with simply drilling hole(s) in the tstat. Temps usually range between 92-94 once fully heated up. There is definitely a slight increase based on engine load (A/C on, climbing hills, etc.) If the CEL was gone I would be happy.
__________________

Sport Package, Rear Entertainment Package, Comfort Access, Cold Weather Package, Smoking Package, L7 High Def Audio
Mods = Powdercoated 149s, Black hood vent and kidneys, LED lighting update, BMW puddle lights (all doors), custom coding by "Triple_O_Coding" (including VIM), updated navi DVD from "PAPER", 90C hybrid thermostat.
Reply With Quote
  #195  
Old 09-09-2013, 07:30 AM
dolfan13's Avatar
dolfan13 dolfan13 is offline
Officially Welcomed to the 'Fest
Location: lexington,ky usa
 
Join Date: Jan 2011
Posts: 828
Mein Auto: 545i
Yep 745iguy I had just pulled the engine and replaced every seal in it.Including the valve seals.So we will see about longer life.Im at about 15k on modded tstat and did seals about 30k ago so....The stock tstat is so easy to mod by the way.
Reply With Quote
  #196  
Old 09-29-2013, 07:03 PM
gammodm gammodm is offline
Registered User
Location: Nashville
 
Join Date: Aug 2013
Posts: 52
Mein Auto: 2004 745i
BMW 90C Thermostat For N62, N63, N73 Engines

Any updates ?


Sent from BimmerApp mobile app
Reply With Quote
  #197  
Old 09-30-2013, 10:58 AM
Thesatman Thesatman is offline
Officially Welcomed to the 'Fest
Location: Albuquerque, NM
 
Join Date: Mar 2013
Posts: 333
Mein Auto: 2008 750LI
Now that the outside temps are down under 100F it consistently operates and maintains temps around 89-92C for me.

Gas milage is a tad bit worse, but performance is a tad bit better also.
__________________

Sport Package, Rear Entertainment Package, Comfort Access, Cold Weather Package, Smoking Package, L7 High Def Audio
Mods = Powdercoated 149s, Black hood vent and kidneys, LED lighting update, BMW puddle lights (all doors), custom coding by "Triple_O_Coding" (including VIM), updated navi DVD from "PAPER", 90C hybrid thermostat.
Reply With Quote
  #198  
Old 09-30-2013, 12:45 PM
ssdriver27 ssdriver27 is offline
Officially Welcomed to the 'Fest
Location: Washington
 
Join Date: Aug 2013
Posts: 230
Mein Auto: 2003 745LI Alpine White
Quote:
Originally Posted by dolfan13 View Post
Just because a tstat opens at a certain temp that dosnt mean you'll run at that temp.Your car will run at a certain temp with no tsat right?Good test would be to remove element altogether in 85f weather ,stop and go and see what the engine maintains.Some cars depending on problems will still over heat.By the way going from 105C -108C to 95C-98C is a LARGE drop.Almost 20F.
This is not completely correct. Reason being, when the thermostat closes it allows the radiator to do its job and cool down the water that is trapped in it. Then the thermostat opens and allows the cooler water to circulate into the engine, then it closes again and the now hot water in the radiator has a chance to sit there and cool down while the engine is heating up the newly cooled water then again the thermostat opens and the process starts over.

if you run no thermostat the engine will take a very long time to warm up to operating temps and will not be consistent because the coolant will not stay in the radiator long enough to cool down, so ambient temps will effect the engine temps more so than with a correctly operating thermostat.

That is also why drilling a small hole in the thermostat works to a point. cause you're constantly circulating a bit of the coolant (enough that it is mimicking a cooler running thermostat but not too much that it is like removing the thermostat altogether)
Reply With Quote
  #199  
Old 09-30-2013, 12:48 PM
ssdriver27 ssdriver27 is offline
Officially Welcomed to the 'Fest
Location: Washington
 
Join Date: Aug 2013
Posts: 230
Mein Auto: 2003 745LI Alpine White
and yes if the thermostat is working correctly it WILL run at or bellow the rated thermostat with only one exception that I know of and that is that you are running a HIGH horsepower motor and the heat produced is too much for the cooling system to efficiently cool the motor.
Reply With Quote
  #200  
Old 09-30-2013, 03:18 PM
dolfan13's Avatar
dolfan13 dolfan13 is offline
Officially Welcomed to the 'Fest
Location: lexington,ky usa
 
Join Date: Jan 2011
Posts: 828
Mein Auto: 545i
Quote:
Originally Posted by ssdriver27 View Post
This is not completely correct. Reason being, when the thermostat closes it allows the radiator to do its job and cool down the water that is trapped in it. Then the thermostat opens and allows the cooler water to circulate into the engine, then it closes again and the now hot water in the radiator has a chance to sit there and cool down while the engine is heating up the newly cooled water then again the thermostat opens and the process starts over.

if you run no thermostat the engine will take a very long time to warm up to operating temps and will not be consistent because the coolant will not stay in the radiator long enough to cool down, so ambient temps will effect the engine temps more so than with a correctly operating thermostat.

That is also why drilling a small hole in the thermostat works to a point. cause you're constantly circulating a bit of the coolant (enough that it is mimicking a cooler running thermostat but not too much that it is like removing the thermostat altogether)
First part of this is not true .Hotrod mag. did extensive test and I have seen many arguments over this.The fluid does not need to stop in the rad to be cooled.A thermostat does one thing only: Its job is to block the flow of coolant to the radiator until the engine has warmed up to a temperature determined by the manufacturer. By letting the engine warm up as quickly as possible, the thermostat reduces engine wear, deposits and emissions. That's it. Once it's open it's the same as not having one.Also under the slowdown theory the coolant stays in the hot engine longer.

Last edited by dolfan13; 09-30-2013 at 03:28 PM.
Reply With Quote
Reply

Bookmarks


Forum Navigation
Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 7 Series / 8 Series > 7 Series - E65 / E66 (2002 - 2008)
Today's Posts Search
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 On



Forum Jump


All times are GMT -7. The time now is 04:38 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
© 2001-2011 performanceIX, Inc. All Rights Reserved .: guidelines .:. privacy .:. terms