Mini Cooper Overheating - MINI Cooper Forum
Go Back   MINI Cooper Forum > MINI Technical Forums > MINI Faults & Fixes > First Generation Faults & Fixes


First Generation Faults & Fixes MINI faults and fixes 2001 - 2006

Mini2.com is the premier Mini Cooper Forum on the internet. Registered Users do not see the above ads.
Reply
Similar Threads
Thread Thread Starter Forum Replies Last Post
2014 MINI Cooper S Revealed in Spy Photos AutoGuide.com MINI News 12 Jun 4th, 2014 10:42 AM
Mini HQ - Terrible ethics for the customer. jobforacowgirl Dealership Feedback 11 May 22nd, 2014 05:36 AM
2014 MINI Cooper Hardtop Revealed AutoGuide.com MINI News 12 Feb 12th, 2014 02:12 PM
Brooklands Mini Day Sunday, March 24, 2013 mab01uk Mini Events 11 Apr 5th, 2013 06:11 PM
Mini Australia service chilld Dealership Feedback 4 Sep 4th, 2012 05:29 AM

 
LinkBack Thread Tools Rate Thread
  #1 (permalink)  
Old Aug 20th, 2009, 06:01 PM
MINI2 Newbie
Offline
 
Join Date: Aug 2009
Posts: 10
Local Time: 11:20 AM
United Kingdom Male View Lemond's Chili Red & White 2nd Gen MINI Cooper S Profile
Mini Cooper Overheating

Is it possible for air locks in the coolant to cause the engine to overheat. Williams Bolton claim this happened during a service on my cooper today. They have retained it overnight to "check it"
Reply With Quote
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old Aug 21st, 2009, 10:27 AM
MINI2 Regular
Offline
 
Join Date: Feb 2008
Posts: 53
Local Time: 11:20 AM
United Kingdom View pisquano's Classified Ads
could it be the reason why my mini seldom shows mild signs of overheating?
how long could an airlock last in the tank before it's "naturally" expelled?

my coolant has been refilled from 0 more than 2 months ago now
Reply With Quote
  #3 (permalink)  
Old Aug 21st, 2009, 01:14 PM
N.O.T.R.A.M.O.O
Offline
 
Join Date: Jul 2008
Location: Hill of Knocks. SCO.
Posts: 140
Local Time: 11:20 AM
Scotland Male
Air locks will cause over heating, but an air lock can only be present if someone never bled it right in the first place... did they change the coolant as part of the service?? or the coolant level has been allowed to drop too low, in which case where did it go?

Common causes for leaks are radiators, thermostat housings split/distorted and cracked expansion bottles (MCS only)

It is possible however that the coolant has been lost over time as it has experienced short "overheats", this is quite possible as the guage doesnt show overheating until its REALLY hot! (see this link for guage operation http://www.mini2.com/forum/first-gen...ml#post3724708 )

Possible causes of overheating (usually when stuck in traffic) are stuck thermostat, bad connection at fan motor, bad connection (for fan motor) in multi connector (clips onto airbox) and I have seen one faulty Engine Coolant Temperature sensor that was reading wrong, but not wrong enough to "flag" up a fault in the engine ECU.

If your car is a Cooper (not an S) get whoever is looking at your car, to check the pressure cap seal's condition. I had one car a couple of weeks ago that had this seal perished causing the cooling system to NOT pressurize, that combined with a low antifreeze content in the coolant caused the system to boil up just BEFORE the fan cut in (spewing out a little coolant everytime) the reason for the boil up is that the fan should cut in at 105 DegC, which is fine for coolant pressurised to 1.1 bar, but is over boiling temperature of coolant at atmospheric pressure.

Hope this helps.

"Allow me to explain... Understeer is when you hit the armco going forwards, Oversteer is when you hit it going backwards!"
Reply With Quote
  #4 (permalink)  
Old Aug 21st, 2009, 11:34 PM
MINI2 Newbie
Offline
 
Join Date: Aug 2009
Posts: 10
Local Time: 11:20 AM
United Kingdom Male View Lemond's Chili Red & White 2nd Gen MINI Cooper S Profile
The coolant strength was weak 15 months after williams manchester changed it. This was highlighted in an inpection 2 service. They changed the fluid but after calling us to tell us the car could be picked up ...they called back to say during a road test the temp had risen to much and the system needed bleeding...hmmm. They claim that they stopped the car and allowed it to cool down.... I am not so sure. As it was back in the garage 10 mins later. They asked us to leave it overnight so they could check it in the morning. This was all at Williams Bolton. I am not happy. Never had a car serviced where they botched the coolant change and am unsure if they could have damaged the cylinder block by driving it while overheated.

Last edited by Lemond; Aug 21st, 2009 at 11:36 PM. Reason: bad speeling
Reply With Quote
  #5 (permalink)  
Old Aug 22nd, 2009, 10:25 AM
N.O.T.R.A.M.O.O
Offline
 
Join Date: Jul 2008
Location: Hill of Knocks. SCO.
Posts: 140
Local Time: 11:20 AM
Scotland Male
Pretty bad if they botched a coolant change... a bit of a rookie error that one, but it does sound like that is what has happened.

It is unlikely they have damaged the block unless it was REALLY hot, but depending on how far they drove it overheating, there is a good chance the head has been warped and the head gasket blown... all depends on how vigilant the mechanic was on the road test.

"Allow me to explain... Understeer is when you hit the armco going forwards, Oversteer is when you hit it going backwards!"
Reply With Quote
Sponsored Links
Advertisement
 
Reply
Tags: , , , ,



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Rate This Thread
Rate This Thread:

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

Similar Threads
Thread Thread Starter Forum Replies Last Post
2014 MINI Cooper S Revealed in Spy Photos AutoGuide.com MINI News 12 Jun 4th, 2014 10:42 AM
Mini HQ - Terrible ethics for the customer. jobforacowgirl Dealership Feedback 11 May 22nd, 2014 05:36 AM
2014 MINI Cooper Hardtop Revealed AutoGuide.com MINI News 12 Feb 12th, 2014 02:12 PM
Brooklands Mini Day Sunday, March 24, 2013 mab01uk Mini Events 11 Apr 5th, 2013 06:11 PM
Mini Australia service chilld Dealership Feedback 4 Sep 4th, 2012 05:29 AM

» Recent Threads
JCW intercooler intake grille.
Oct 19th, 2014 08:06 PM
Last post by The Nun
Today 08:31 AM
3 Replies, 253 Views
New iPhone update messed up blue tooth, anyone else?!
Yesterday 02:35 PM
Last post by BeccaRoberts04
Today 07:37 AM
3 Replies, 189 Views
Automatic transmission - settle a bet!
Oct 18th, 2014 06:05 PM
Last post by whaap
Yesterday 11:49 PM
8 Replies, 518 Views
2001 Cooper wheel nut key
Yesterday 05:05 PM
Last post by Angib
Yesterday 09:00 PM
1 Replies, 186 Views
A pillar exterior trim Mini Cooper D 2011
Yesterday 06:49 PM
Last post by daniel_couch
Yesterday 06:49 PM
0 Replies, 141 Views
Mini One r56 engine rattle
Yesterday 06:41 PM
Last post by In Reverse
Yesterday 06:41 PM
0 Replies, 265 Views
R56 Aux input volume???????
Yesterday 04:00 PM
Last post by peteski2014
Yesterday 04:00 PM
0 Replies, 147 Views
engine fan on more frequently
Oct 16th, 2014 01:46 PM
Last post by heathwebbo
Yesterday 03:31 PM
2 Replies, 382 Views
Rear wiper motor stem problem
Oct 18th, 2014 09:57 AM
Last post by ScreamMini
Yesterday 03:26 PM
1 Replies, 253 Views
UK Big Brake fitment, what to do?
Yesterday 01:44 PM
Last post by todd tce
Yesterday 01:44 PM
0 Replies, 164 Views
Ac compressor
Yesterday 12:40 PM
by ronny
Last post by ronny
Yesterday 12:40 PM
0 Replies, 163 Views
MINI Roadster Headed to Frankfurt Auto Show?
May 19th, 2009 02:32 PM
Last post by angel10
Yesterday 09:02 AM
3 Replies, 4,120 Views
Automatic, won't shift out of park
Jun 30th, 2014 07:51 PM
Last post by Jazelmarie
Yesterday 12:00 AM
2 Replies, 1,008 Views
2001 Bini Central Locking key fob pairing?
Oct 19th, 2014 11:03 AM
Last post by mab01uk
Oct 19th, 2014 10:44 PM
1 Replies, 266 Views
No spray on windshield wiper
Oct 19th, 2014 08:54 PM
by mom7x
Last post by mab01uk
Oct 19th, 2014 10:38 PM
1 Replies, 208 Views
Storage Compartment Pack
May 29th, 2008 03:51 PM
Last post by sirron
Oct 19th, 2014 10:19 PM
6 Replies, 6,868 Views
Average life in miles for 2nd Gen mini clutch
Aug 12th, 2014 10:40 PM
Last post by mom7x
Oct 19th, 2014 08:40 PM
3 Replies, 916 Views
2004 mini one aftermarket stereo
Oct 19th, 2014 08:31 PM
Last post by Gee_Kimberley
Oct 19th, 2014 08:31 PM
0 Replies, 179 Views
JCW/Sparco seats and rear facing baby seat?
Oct 19th, 2014 07:16 AM
Last post by widetyres
Oct 19th, 2014 07:26 PM
2 Replies, 423 Views
» Premium
» Auto Insurance
Wheel & Tire Center

Powered by vBadvanced CMPS v3.2.1

All times are GMT. The time now is 10:20 AM.



Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
SEO by vBSEO 3.3.2