Aux Fan , AC , Coolant and Temp - Page 2 - Bimmerfest - BMW Forums



Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 7 Series & 8 Series > 7 Series - E38 (1995 - 2001)

7 Series - E38 (1995 - 2001)

Reply
 
Thread Tools Display Modes
  #26  
Old 05-16-2019, 01:32 PM
dmarkovina dmarkovina is offline
Registered User
Location: London
 
Join Date: Mar 2007
Posts: 39
Mein Auto: BMW 728i
Or just drill a 3mm burp hole at the top of the old thermostat to make sure no trapped air prevents the thermostat from opening fully and let the engine run a bit cooler. The OEM opening temp of 105 is plain silly. https://rover.ebay.com/rover/0/0/0?m...2F264183152212
Not sure if there are local guys doing it in US?
Reply With Quote
Sponsored Links
Advertisement
 
  #27  
Old 05-16-2019, 01:41 PM
dmarkovina dmarkovina is offline
Registered User
Location: London
 
Join Date: Mar 2007
Posts: 39
Mein Auto: BMW 728i
Or this maybe?

https://rover.ebay.com/rover/0/0/0?m...2F111952266430
Reply With Quote
  #28  
Old 05-16-2019, 01:50 PM
ou18 ou18 is offline
Playing Mechanic At Home
Location: Wellington, FL
 
Join Date: Sep 2010
Posts: 894
Send a message via AIM to ou18 Send a message via Yahoo to ou18
Mein Auto: 1998 740 I
Quote:
Originally Posted by dmarkovina View Post
Or just drill a 3mm burp hole at the top of the old thermostat to make sure no trapped air prevents the thermostat from opening fully and let the engine run a bit cooler. The OEM opening temp of 105 is plain silly. https://rover.ebay.com/rover/0/0/0?m...2F264183152212
Not sure if there are local guys doing it in US?
Hmmm this is very tempting.
__________________

1998 White 740 I (MY 06/98) Daily Driver (when not apart)
1997 Black 740IL (w\ badass Phone in console) Donor Car Now
Reply With Quote
Sponsored Links
Advertisement
 
  #29  
Old 05-21-2019, 08:06 AM
ou18 ou18 is offline
Playing Mechanic At Home
Location: Wellington, FL
 
Join Date: Sep 2010
Posts: 894
Send a message via AIM to ou18 Send a message via Yahoo to ou18
Mein Auto: 1998 740 I
Got my parts that I ordered.

New Water pump , thermo (oem) and gaskets. Also received the viscous coupler for the fan as well.

Yesterday i installed the viscous fan back on the car (havent done the pump or thermo yet). Wanted to see if this resolves my issue.

Upon turning on the car, I immediately heard the jet engine sound, which I never really heard on the old one. I let it get up to op temp. 91 , 99 , 105 , 108 , 110 , 111 , 113 it finally kicked back into cooling mode.
Brought the temp back down to 108 and in some cases 105.

I continued to let it run (idle). Monitored it via INPA on the ktemp. there was one point it actually hit 116 and then it started cooling down again. So the viscous fan is definitely doing its job. And again, the car was just sitting idling.

In an effort to increase the air flow, i also degreased and cleaned out the condensor radiator in front of the radiator. This helped very little to be honest, even though I can see a difference on the condesor radiator.

My next move will be to replace the water pump and the thermo. Given the age of the car and not knowing if it has ever been replaced or if it has, when. Im actually really curious if the pump is moving fluid the way it should, but maybe some of the veins are damaged and it isnt moving fluid properly. Who knows, only pulling it off will tell.

I also got myself a infrared temp reader. I checked at the water pump outlet to the radiator, i was getting readings around 225 on the hose. I checked at the radiator, it was approx the same. however according to inpa it was registering 113 C or 235F... May need to adjust emissivity on the reader. But in any event, I will end up replacing the thermo and pump prbly this weekend..

More to come...
__________________

1998 White 740 I (MY 06/98) Daily Driver (when not apart)
1997 Black 740IL (w\ badass Phone in console) Donor Car Now

Last edited by ou18; 05-21-2019 at 08:43 AM.
Reply With Quote
  #30  
Old 05-22-2019, 05:22 AM
ou18 ou18 is offline
Playing Mechanic At Home
Location: Wellington, FL
 
Join Date: Sep 2010
Posts: 894
Send a message via AIM to ou18 Send a message via Yahoo to ou18
Mein Auto: 1998 740 I
Took the car for about a 15 mile drive approx 20 minutes under load.
Not much over 60 - 65 MPH.

While driving in non sport mode - the car would maintain a ktemp between 108 and 111.. When I got to a light, it would idle around ktemp 111 and at some points reached 113 and once it hit 114. As soon as I started to get moving again it would maintain between 108 and 111 again..

Now in sport mode a few times, the temp at the same speeds would drop down into the high 90s while driving. I thought this was odd. Almost immediately the temp would go from 111 and just start dropping all the way down into the 90s. Possibly water pump pushing more coolant thru the system at the higher rpms. Just seems kind of strange is all..
__________________

1998 White 740 I (MY 06/98) Daily Driver (when not apart)
1997 Black 740IL (w\ badass Phone in console) Donor Car Now
Reply With Quote
Reply

See More Related BMW Stories


Forum Navigation
Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 7 Series & 8 Series > 7 Series - E38 (1995 - 2001)
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 Off



Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Where do we find the list of all E39 transmission, airbag, abs & obd BMW error codes? arthurwood E39 (1997 - 2003) 21 12-08-2017 05:39 PM
Weird question ... Where are ENGINE-specific BMW P1xxx trouble codes anyway? bluebee E39 (1997 - 2003) 49 12-02-2017 05:12 PM
Coolant temp sensor, aux fan & ac system...its a bit different question then previous aioros E39 (1997 - 2003) 10 08-29-2017 09:44 AM
BMW OBD II Codes (Complete) doru E39 (1997 - 2003) 2 03-26-2014 01:26 PM
Aux fan? coolant temp sensor? fan clutch? need some help please. mic0ne23 E39 (1997 - 2003) 12 08-16-2012 11:23 AM


All times are GMT -7. The time now is 09:42 AM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
© 2001- VerticalScope Inc. All rights reserved.