mini one - heating issues - MINI Cooper Forum
Go Back   MINI Cooper Forum > Model Specific MINI Forums > MINI One > First Generation MINI One


First Generation MINI One MINI One from 2001 - 2006

Mini2.com is the premier Mini Cooper Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools Rate Thread
  #1 (permalink)  
Old Jan 18th, 2013, 05:16 PM
MINI2 Newbie
Offline
 
Join Date: Jan 2012
Posts: 7
Local Time: 03:58 PM
United Kingdom
mini one - heating issues

for a while now, i've had issues with my heating, eventually a garage diagnosed the head gasket had gone. I've had this replaced, all was well. Then a few weeks later, I wasn't getting any hot air out of the blowers. took it back to garage, found it was air locks, fixed & had hot air again. few weeks later, same thing again, air locks, garage fixed & hot air again. Inbetween all this, we were checking coolant level daily and then weekly till it settled.

It's been ok for a few months and now the cold weather has kicked in, suddenly no hot air again. We bled the system by undoing the 2 screws we could see, lots of air released. once all gone I took the car for a drive, after about 10mins, I finally started getting hot air, but when i got to a junction, the air would go cool, as i pulled away and got up to speed, the air would go hot again?? When we got back home, left the engine running and eventually it was just cold air coming out. I undid bleed valves, lots of air in system again and didnt tighten untill all air had gone. sat back in car, still blowing cold air, despite engine being at temperture.

Next morning, i removed air from system via bleed valves, then removed coolant filler cap. started the engine and waited for it to warm up, when engine got to temp, i could see lots of bubbling in the filler tube till eventually just water was coming out. I took car for longer run, and despite been up at temperture before setting off, it was still a good 10mins till hot air started blowing out, but as above, when got to junctions and eventually end of journey, back to cool air? I undid the bleed valves and again, lots of steam being released for a good minute until coolant started coming out. The final notes to add is that one side of radiator is always hot, as I bleed air out of the system, you can feel the other side of radiator warming up? The cars temp always reaches midway, and doesn't appear to overheat. Not sure if it helps, but the header tank is always above the max level...whether this changes when driving..who knows? No coolant leaks either?

Does anyone have any ideas what might be the cause of this. Sorry it's a long explanation but want to get all the facts out to help diagnose this. when the garage replaced head gasket, they apparently tested the water pump and said all was well. Could it be the heater matrix, or is it simply still an air lock? Something else is a dodgy thermostat??

thanks in advance
stressed mini one owner (
Reply With Quote
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old Jan 18th, 2013, 06:16 PM
mab01uk's Avatar
MINI2 Master
Offline
 
Join Date: Nov 2006
Location: London
Posts: 5,718
Local Time: 04:58 PM
United Kingdom Male
Have a look through this link of Mini cooling info it may be of some help in pin pointing the possible causes:
Solving MINI Cooling Problems.......... - Forums
Reply With Quote
  #3 (permalink)  
Old Jan 19th, 2013, 09:53 AM
MINI2 Newbie
Offline
 
Join Date: Jan 2012
Posts: 7
Local Time: 03:58 PM
United Kingdom
Thanks for the reply. I've checked out the links and what I've just tried is bleeding system from cold, heating on, fan on full blast. Filler cap off, both bleed screws open. After 5mins the water started bubbling in the filler cap, occasionally coming to top then sinking back down, I kept squeezing the inlet hose to the radiator but at no point did any fluid come out of either bleed screw...would I be right in thinking the water pump isn't functioning?
Reply With Quote
  #4 (permalink)  
Old Jan 19th, 2013, 04:48 PM
mab01uk's Avatar
MINI2 Master
Offline
 
Join Date: Nov 2006
Location: London
Posts: 5,718
Local Time: 04:58 PM
United Kingdom Male
This case in link below turned out to be the water pump impellor (inside) was not turning with the shaft/pulley and therefore not pumping water around the system properly.......no way of telling for sure without removing the pump to examine inside though:
http://www.mini2.com/forum/first-gen...nightmare.html

Not sure how your garage would have tested the water pump without removal?.......only leaks are really obvious from the outside.
Reply With Quote
  #5 (permalink)  
Old Jan 20th, 2013, 12:53 PM
MINI2 Newbie
Offline
 
Join Date: Dec 2012
Posts: 16
Local Time: 04:58 PM
United Kingdom
I was the poster in the thread referred to above,my daughters 2003 Cooper was overheating with the heater being stone cold,we had bubbling in the filler and i tried bleeding it loads of times.

I put a new rad and thermostat in as well but this didn`t cure it,i also cleaned out the heater matrix,while doing this i noticed the water was old and brown although the system was refilled numerous times,this seemed to point to the pump not circulating water properly.

The pump is mounted on the front of the engine and means dismantling the whole front to get at it,there is an excellent technical article on how to do this somewhere?

When i removed the pump it felt very loose.I don`t know how your garage tested the pump but i don`t see a way of checking its working on the car.
I fitted new pump and after putting the rad back in and refilling we instantly had warm air and no more overheating.It seems the pump had failed internally and although there were no leaks and nothing appeared to be broken it just was not pumping.

Cars been fine for about a month now and i keep checking the coolant level regularly.
Hope this helps.
Steve
Reply With Quote
Thanks for this post from:
Sponsored Links
Advertisement
 
Reply


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

» Recent Threads
MOT Advisories - Would you buy this car?
Today 01:34 PM
Last post by RoomForFour
Today 01:34 PM
0 Replies, 69 Views
Annoying vibration in the dashboard
Feb 14th, 2012 12:38 AM
Last post by ryanharris
Today 01:01 PM
8 Replies, 3,236 Views
LED Daytime running lights - retro fit
Apr 15th, 2014 06:08 PM
Last post by french01
Today 12:57 PM
7 Replies, 1,443 Views
What Sat nav cd do I need?
Today 11:47 AM
Last post by uk_ricky_uk
Today 11:55 AM
1 Replies, 63 Views
Paint warrenty
Today 10:16 AM
by Peter85
Last post by The Nun
Today 11:52 AM
1 Replies, 81 Views
Drivers door actuator, fitment?
Oct 6th, 2014 05:13 PM
Last post by uk_ricky_uk
Today 11:49 AM
2 Replies, 440 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
Today 11:00 AM
8 Replies, 790 Views
R56 Aux and Usb
Today 10:41 AM
by Redevo
Last post by Redevo
Today 10:41 AM
0 Replies, 76 Views
Sprintbooster for MINI Cooper R56
May 14th, 2009 04:29 PM
Last post by Gacek191
Today 07:41 AM
9 Replies, 3,475 Views
I need a tool to flash a JCW map to my 04 MCS ECU
Yesterday 09:42 PM
Last post by djtmalta
Yesterday 10:36 PM
2 Replies, 235 Views
Electric window stopped working
Jul 6th, 2006 03:48 PM
Last post by regarp
Yesterday 06:22 PM
34 Replies, 65,980 Views
Bonnet touching body
Aug 15th, 2014 03:47 PM
Last post by The Nun
Yesterday 03:58 PM
3 Replies, 467 Views
Facebook page selling mini parts around the uk
Yesterday 11:50 AM
by Alex93x
Last post by Restyle
Yesterday 03:25 PM
2 Replies, 167 Views
New Mini Cooper D - Worth the money?
Yesterday 01:33 PM
Last post by dangoodwin
Yesterday 01:33 PM
0 Replies, 147 Views
Mini Clubman Barn Doors Won't Lock
Oct 22nd, 2014 03:51 AM
Last post by WeeBad
Yesterday 01:03 PM
3 Replies, 443 Views
R56 Footwell module dead
Jul 15th, 2014 04:19 AM
by miniuy
Last post by k3fus
Yesterday 07:16 AM
6 Replies, 1,297 Views
inside lights
Oct 23rd, 2014 11:19 PM
Last post by bigmamabear
Oct 23rd, 2014 11:19 PM
0 Replies, 192 Views
Lights on warning not working
Oct 21st, 2014 11:42 AM
by S2dicky
Last post by S2dicky
Oct 23rd, 2014 09:16 PM
4 Replies, 493 Views
Smoked Headlight Covers GTO276S
Oct 23rd, 2014 08:49 PM
by tmath23
Last post by tmath23
Oct 23rd, 2014 08:49 PM
0 Replies, 195 Views
engine fan on more frequently
Oct 16th, 2014 01:46 PM
Last post by stewarth
Oct 23rd, 2014 07:27 PM
3 Replies, 676 Views
» Premium
» Auto Insurance
Wheel & Tire Center

Powered by vBadvanced CMPS v3.2.1

All times are GMT. The time now is 03:58 PM.



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