318ti.org forum

Go Back   318ti.org forum > Technical, Maintenance and Modifications > Engine


Engine Tuneups, chips, wires, spark plugs.

» Recent Threads
98 318ti
Yesterday 04:46 AM
Last post by 98318ti
Yesterday 04:46 AM
0 Replies, 203 Views
Age Demographics
10-30-2004 05:06 AM
Last post by 1996 328ti
Yesterday 03:20 AM
324 Replies, 91,907 Views
Jean's Turbo Build -...
08-18-2009 04:08 AM
Last post by Jean H.318TI
Yesterday 12:52 AM
526 Replies, 133,807 Views
WTB in Norcal
01-14-2019 12:33 AM
Last post by dudecati
01-21-2019 06:51 PM
8 Replies, 777 Views
FS: E36 Brakes, rotors,...
12-06-2018 06:30 AM
Last post by crAppAchic0
01-21-2019 05:08 PM
4 Replies, 640 Views
Track ti build (M52)
03-05-2016 04:00 PM
Last post by spidertri
01-19-2019 05:57 PM
47 Replies, 23,387 Views
Does anyone have the...
01-10-2019 11:59 PM
Last post by 1996 328ti
01-19-2019 04:29 PM
2 Replies, 446 Views
throttle bodies on the...
01-19-2019 12:20 AM
Last post by jerseytim
01-19-2019 12:20 AM
0 Replies, 211 Views
Zionsville kit
01-17-2019 08:45 PM
Last post by lokister
01-17-2019 08:45 PM
0 Replies, 212 Views
Miscellaneous Parts for...
02-13-2018 10:56 PM
Last post by dudecati
01-17-2019 05:11 AM
52 Replies, 15,460 Views
Reply Share/Bookmark
Thread Tools Display Modes
Old 04-10-2012, 11:04 PM   #1
Join Date: Oct 2009
Location: Louisiana
Posts: 56
iTrader: (0)
Default Instruments lead to questions

I have gotten myself a bluetooth OBD monitor that plugs into the port by the driver's left knee. Really shows a bunch of things I never knew and I am still poking around with the software (Torque on an Android tablet) Short term fuel trim data is quite interesting.

One question already - my cooling water temp runs 98 -101 C at all times,on the low end of that range when the A/C is on, on the 100-101 end once warmed up and A/C off. Is that correct, the proper range? Seems I recall the thermostat being a much lower number but cannot lay hands on spec just now. My thermostat is practically brand new, replaced last fall when I did the radiator and hoses so I doubt that is problem. Clearly temp drops when fan kicks in on high with A/C so maybe running right at 100 all the time is correct?

ryszardsh is offline   Reply With Quote
Old 04-11-2012, 12:44 AM   #2
Senior Member
zoner's Avatar
Join Date: Oct 2008
Location: Los Angeles, CA
Posts: 1,463
iTrader: (7)

Assuming your car is an OBD-II M44, the stock thermostat spec. is 95*C. There are, however, any number of things that could cause it to run hotter, including: air in the system, deteriorated water pump impeller, clogged radiator, clogged water jackets in the head/block, etc. If the temp. is noticeably fluxuating when the A/C kicks on and off, something isn't quite right. Does the temp needle noticeably move as well, or is it just on your OBD monitor?
zoner is offline   Reply With Quote
Old 04-11-2012, 12:49 AM   #3
Senior Member
Join Date: Jul 2009
Location: MD/PA/DC
Posts: 1,629
iTrader: (3)

Normal operating temperature is 12*F over the temperature of the thermostat IIRC.

These things are designed to run hot.
No more ti.
familytruckster is offline   Reply With Quote
Old 04-11-2012, 02:04 AM   #4
Join Date: Oct 2009
Location: Louisiana
Posts: 56
iTrader: (0)
Default instruments and temps

This is a 98 M44 OBD II. I do not see any real temp needle movement when the a/c kicks on, a very slight (1/4 needle width?) downward shift. I doubt I have a clogged radiator, as it is practically new, and if it is supposed to run at 12F above thermostat then I am almost dead on that at highest reading, just a little lower (12 f above 95 C is ~ 102C)

Maybe 98-101 is just dead normal. Is there some reference for 12F above the thermostat spec?


Last edited by ryszardsh; 04-11-2012 at 02:05 AM. Reason: typo
ryszardsh is offline   Reply With Quote
Old 04-11-2012, 02:19 AM   #5
1996 328ti
Senior Member
1996 328ti's Avatar
Join Date: Jun 2003
Location: Greenville, SC
Posts: 9,310
iTrader: (1)

Originally Posted by ryszardsh View Post
I do not see any real temp needle movement when the a/c kicks on, a very slight (1/4 needle width?) downward shift.
You won't. Since the E36, water temp gauges are useless.
I can be on the track at WOT in 95 degree weather and the needle is dead center. Then take my E30 where the needle actually moves up and down slightly whether I'm sitting or moving.
BMW CCA #146825
1995 BMW 318ti Club Sport 1996 BMW 328ti 2003 MINI Cooper S
1996 328ti is offline   Reply With Quote
Old 04-11-2012, 05:08 PM   #6
Senior Member
bullmand's Avatar
Join Date: Jun 2003
Location: Catonsville, MD
Posts: 1,028
iTrader: (0)

Mine runs consistently in the 185 to 195 degree Fahrenheit range.
'98 Alaska Blue Sport
'99 Titan Silber 332ti
bullmand is offline   Reply With Quote
Old 04-11-2012, 10:31 PM   #7
ti cali ed
Join Date: Mar 2012
Location: iowa
Posts: 90
iTrader: (0)

You're temp is fine. The reason for a thermostat is to aid in heating up the motor faster. So when the coolant is cooler the thermo is closed allowing the coolant in the block to heat up when it reaches temp the thermo opens and allows it to travel through the radiator. If the coolant only got to 95 degrees the temp the thermo opened at it would constantly be opening and closing. So they design them to open slighly cooler than what the engine should run at. Now the cooling fans are hooked up to another temp sensor and turn on and off to cool the coolant, they really only run in town as there's enough airflow at hwy speed. However when you turn the a/c the fans kick in to cool the condenser in front of the radiator. This also cools the coolant slightly. Bottom line, you're good. Cool toy though isn't it.
ti cali ed is offline   Reply With Quote


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
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
New to BMW - Simple questions about the 318ti justmanson I'm thinking about buying a ti. 17 10-20-2010 07:05 PM
Stock E36 Questions indiejack I'm thinking about buying a ti. 14 02-01-2010 03:02 AM
Might stay with a ti, Ive got questions. SDKmann General Chit Chat 16 12-06-2007 03:34 AM
Noob from NC (with questions!) kevman284 Personal bios and Introductions 11 02-24-2007 04:15 AM
Not the same old questions.... sort of! Soldo Engine Swaps 9 11-30-2005 03:49 PM

All times are GMT +1. The time now is 07:57 AM.

Powered by site supporters
vBulletin Version 3.8.8
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
Copyright ©1999 - 2019, 318ti.org
© vBadvanced CMPS v3.2.2
[page compression: 91.15 k/107.18 k (14.95%)]

318ti.org does not warrant or assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any information or products discussed.