R53 Overheating - Garag can't find fault - MINI Cooper Forum
Go Back   MINI Cooper Forum > Model Specific MINI Forums > MINI Cooper S > First Generation MINI Cooper S


First Generation MINI Cooper S MINI Cooper S 2002 - 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
Where can I find a replacement R53 washer for the transmission plug(s)? Jinkz Maintenance & MINI Care 6 Aug 7th, 2014 01:24 PM
R53 SRS airbag light and fault codes kirby First Generation Interior & Ice 0 Apr 28th, 2013 08:25 AM

 
LinkBack Thread Tools Rate Thread
  #1 (permalink)  
Old Aug 19th, 2014, 12:13 PM
MINI2 Newbie
Offline
 
Join Date: Mar 2009
Posts: 12
Local Time: 02:56 AM
United Kingdom
R53 Overheating - Garag can't find fault

Hi,

I've got a 2002 R53 which overheated during the MOT. The Thermostat housing & temp sensor, Radiator and wiring to the Fan were replaced and all was apparrently fixed, until it overheated in traffic a week later. Back to the garage it went and they've called me today saying they can't find anything wrong. They've had the car apart and put it back together and can find nothing wrong. I now don't trust the car to stay cool in traffic. What else can it be?
The Radiator Fan Fuse (5a) in the fuse box keeps blowing so they're looking for something drawing more current than 5a through that. Could it be a faulty radiator fan / resistor?
I've also read that the PS fan is connected to the same circuit. Is it possible this is causing the issue?

Any help is much appreciated as I'm close to giving up and getting rid
Reply With Quote
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old Aug 19th, 2014, 10:49 PM
MINI2 Newbie
Offline
 
Join Date: Aug 2014
Location: Berkshire
Posts: 12
Local Time: 03:56 AM
United Kingdom
Hi

I've just been fixing a few things on my daughters mini related to the cooling system

I'm pretty sure the fan draws a lot more than 5A

The radiator fan runs at two speeds, the low speed is supposed to come on at 105C, or if you have air con, when the air con is running.

The high speed fan comes on if the low speed fan doesn't cool the engine enough (112C) but I think that by the time that comes on the engine is probably very close to overheating and unless your cooling is perfect it could be too late

The low speed fan depends on a large resistor to limit the current (and therefore the speed) but it is common for it to burn out and leave no low speed fan.

I would check that the low speed fan is coming on correctly at 105C and cooling the engine down. If it comes on too late then check the thermostat for the fan. If it does not come on at all or only at full speed at 112C then check the resistor for the low speed fan has not burnt out.

Don't rely on the temperature gauge to tell you when the engine is overheating. It is controlled by the ECU and will show the rise in temp up to the normal temperature but after that will not rise until it is again very close to overheating. You can read the temperature from a OBD tool connected to the OBD port.

You can also display the temperature on the digital display by following these steps.

With the key in the ignition, but in the off position, press and hold down the odometer reset button, while holding the button down, switch the key in the ignition to position 1.
The screen will say 'Test' and a number.
Scroll through, (pressing reset button) through to test 19 and wait a moment.
Wait and the message will say "log i-off" then "log i-on" and back to "log i-off" again. When "log i-off" appears, press again.
Now you can press reset to get to 7.0 and this is your water temp in Centigrade.

If significant amounts of coolant have been added then the system needs to be bled carefully to ensure that all the air has been removed from the system, this can be tricky; there are several bleeds screws in the pipework that should be used to make sure the air is removed.
Reply With Quote
  #3 (permalink)  
Old Aug 20th, 2014, 07:02 AM
heathwebbo's Avatar
MINI2 Regular
Online
 
Join Date: Feb 2014
Location: Burton on Trent
Posts: 216
Local Time: 02:56 AM
United Kingdom Male
on the earlier cars the power steering fan is connected to the cooling fan & they can sieze up which would blow the fuse so might be worth checking that out
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
Where can I find a replacement R53 washer for the transmission plug(s)? Jinkz Maintenance & MINI Care 6 Aug 7th, 2014 01:24 PM
R53 SRS airbag light and fault codes kirby First Generation Interior & Ice 0 Apr 28th, 2013 08:25 AM

» Recent Threads
New Online Magazine for Track Day Enthusiasts
Apr 14th, 2014 12:56 AM
Last post by AutoTrackDay
Today 01:44 AM
30 Replies, 5,789 Views
Fan Stays on after Switching off Engine
Oct 17th, 2014 09:29 PM
Last post by burakace
Today 12:41 AM
3 Replies, 409 Views
PAS Fluid Leak HELP!!
Oct 15th, 2014 07:16 PM
Last post by SeanC
Yesterday 11:44 PM
8 Replies, 770 Views
MOT Advisories - Would you buy this car?
Yesterday 01:34 PM
Last post by SeanC
Yesterday 11:28 PM
2 Replies, 196 Views
Erratic engine speed when cold
Oct 19th, 2014 09:56 AM
Last post by tyred bob
Yesterday 08:37 PM
1 Replies, 306 Views
Clutch/engine problem
Yesterday 07:33 PM
Last post by jamieeccles123
Yesterday 07:33 PM
0 Replies, 96 Views
Key scratch to body work - Edinburgh
Yesterday 06:31 PM
by Dudlg0
Last post by Dudlg0
Yesterday 06:31 PM
0 Replies, 104 Views
MINI Remote Central Locking Won't Unlock
Yesterday 05:33 PM
by KrisL
Last post by KrisL
Yesterday 05:33 PM
0 Replies, 110 Views
help needed for choosing the tensioner
Yesterday 05:13 PM
by tianfa1
Last post by tianfa1
Yesterday 05:13 PM
0 Replies, 112 Views
R56 Footwell module dead
Jul 15th, 2014 04:19 AM
by miniuy
Last post by yourmate
Yesterday 04:19 PM
7 Replies, 1,380 Views
Annoying vibration in the dashboard
Feb 14th, 2012 12:38 AM
Last post by ryanharris
Yesterday 01:01 PM
8 Replies, 3,292 Views
LED Daytime running lights - retro fit
Apr 15th, 2014 06:08 PM
Last post by french01
Yesterday 12:57 PM
7 Replies, 1,496 Views
What Sat nav cd do I need?
Yesterday 11:47 AM
Last post by uk_ricky_uk
Yesterday 11:55 AM
1 Replies, 113 Views
Paint warrenty
Yesterday 10:16 AM
by Peter85
Last post by The Nun
Yesterday 11:52 AM
1 Replies, 129 Views
Drivers door actuator, fitment?
Oct 6th, 2014 05:13 PM
Last post by uk_ricky_uk
Yesterday 11:49 AM
2 Replies, 465 Views
Misfiring R55 JCW engine in 6th gear between 2k-3k RPM with throttle wide open
Oct 21st, 2014 10:30 AM
Last post by Mr Muffin
Yesterday 11:00 AM
8 Replies, 928 Views
R56 Aux and Usb
Yesterday 10:41 AM
by Redevo
Last post by Redevo
Yesterday 10:41 AM
0 Replies, 123 Views
Sprintbooster for MINI Cooper R56
May 14th, 2009 04:29 PM
Last post by Gacek191
Yesterday 07:41 AM
9 Replies, 3,515 Views
I need a tool to flash a JCW map to my 04 MCS ECU
Oct 24th, 2014 09:42 PM
Last post by djtmalta
Oct 24th, 2014 10:36 PM
2 Replies, 285 Views
Electric window stopped working
Jul 6th, 2006 03:48 PM
Last post by regarp
Oct 24th, 2014 06:22 PM
34 Replies, 66,044 Views
» Premium
» Auto Insurance
Wheel & Tire Center

Powered by vBadvanced CMPS v3.2.1

All times are GMT. The time now is 02:56 AM.



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