Ausmini
It is currently Wed Jun 25, 2025 10:33 pm

Board index » Mini Chat » Mini Chat

All times are UTC + 10 hours




Post new topic Reply to topic  Page 1 of 1
  [ 12 posts ] 
  Print view Previous topic | Next topic 
Author Message
cooperess
 Post subject: IGNITION COIL 1969
PostPosted: Sun Nov 13, 2022 3:34 pm 
Offline
1098cc
1098cc

Joined: Wed Sep 30, 2015 9:38 am
Posts: 1572
Location: Brandy Hill, NSW
1969 Mini Cooper S Mk2 which is unmodified.

I think my ignition coil has packed up.

Symptoms are the coil is getting super hot and engine is cutting out.

What are the tests I can do to check the coil?

What is the type of replacement coil I can get?
Top
 Profile  
 
gtogreen1969
 Post subject: Re: IGNITION COIL 1969
PostPosted: Sun Nov 13, 2022 4:35 pm 
Offline
1275cc
1275cc
User avatar

Joined: Fri May 02, 2008 3:07 pm
Posts: 5123
Location: The Internet
Check the primary windings by sticking an ohmeter on the + & - terminals. Resistance should be about 3 ohms.

The secondary windings are checked by the + terminal and the HT lead outlet. Reading would be around 10k and 15k ohms

Overheating can be from a short or loss of cooling oil.

There should be a few how to videos on YouTube if you get stuck


Last edited by gtogreen1969 on Wed Jan 25, 2023 5:53 pm, edited 1 time in total.

Top
 Profile  
 
cooperess
 Post subject: Re: IGNITION COIL 1969
PostPosted: Sun Nov 13, 2022 5:16 pm 
Offline
1098cc
1098cc

Joined: Wed Sep 30, 2015 9:38 am
Posts: 1572
Location: Brandy Hill, NSW
Checked the primary windings by sticking an ohmeter on the + & - terminals. Resistance 0.00 ohms.

The secondary windings are checked by the + terminal and the HT lead outlet. Reading is 5.50 ohms

No oil loss.
Top
 Profile  
 
gtogreen1969
 Post subject: Re: IGNITION COIL 1969
PostPosted: Sun Nov 13, 2022 5:25 pm 
Offline
1275cc
1275cc
User avatar

Joined: Fri May 02, 2008 3:07 pm
Posts: 5123
Location: The Internet
cooperess wrote:
Checked the primary windings by sticking an ohmeter on the + & - terminals. Resistance 0.00 ohms.

The secondary windings are checked by the + terminal and the HT lead outlet. Reading is 5.50 ohms

No oil loss.


Chuck it out
Top
 Profile  
 
68+86auto
 Post subject: Re: IGNITION COIL 1969
PostPosted: Sun Nov 13, 2022 5:45 pm 
Offline
998cc
998cc
User avatar

Joined: Fri Oct 18, 2019 5:11 pm
Posts: 601
Location: Brisbane Northside
If those measurements are accurate then it is bad for sure.

_________________
1986 Mayfair (998 auto), 1974 S, 1974 Van, 1972 PMG Van

Too many minis
Top
 Profile  
 
cooperess
 Post subject: Re: IGNITION COIL 1969
PostPosted: Sun Nov 13, 2022 5:48 pm 
Offline
1098cc
1098cc

Joined: Wed Sep 30, 2015 9:38 am
Posts: 1572
Location: Brandy Hill, NSW
Ok = out it goes.

Any idea where to get a replacement?
Top
 Profile  
 
jaybee
 Post subject: Re: IGNITION COIL 1969
PostPosted: Sun Nov 13, 2022 6:09 pm 
Offline
848cc
848cc

Joined: Mon Apr 25, 2022 6:38 pm
Posts: 73
Almost anywhere you can get one. Only thing you need to know is the voltage it’s designed for and does it use a ballast resistor.
Top
 Profile  
 
DavidE
 Post subject: Re: IGNITION COIL 1969
PostPosted: Sun Nov 13, 2022 6:19 pm 
Offline
998cc
998cc

Joined: Mon Jan 12, 2015 10:59 pm
Posts: 985
Location: Holt ACT
cooperess wrote:
Ok = out it goes.

Any idea where to get a replacement?


minisport.com.au/search/?q=coil
Top
 Profile  
 
drmini in aust
 Post subject: Re: IGNITION COIL 1969
PostPosted: Sun Nov 13, 2022 6:23 pm 
Offline
religious status
religious status
User avatar

Joined: Fri Mar 19, 2004 6:19 pm
Posts: 39752
Location: near Baulkham Hills, NSW
Its a Lucas 12H. 3 ohm no resistor.
I had a good run with Bosch GT40 instead on my S.

_________________
DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R. :mrgreen:
Top
 Profile  
 
timmy201
 Post subject: Re: IGNITION COIL 1969
PostPosted: Sun Nov 13, 2022 6:41 pm 
Offline
1275cc
1275cc
User avatar

Joined: Sun Apr 29, 2012 1:19 pm
Posts: 4494
Location: Wollongong, NSW
As long as it’s 3ohm with a standard 1969 electrical system it’ll work fine. If you have points it’s worth checking the dwell time (points gap) is correct as this can contribute to the coil overheating

Tony at Auto Electrics on Wheels (ausmini “convertible mini”) is always super helpful and quick with post & knows exactly what you’ll need

Auto Electrics on Wheels
Tel: (07) 5546 9065
Email: [email protected]

_________________
Image
Top
 Profile  
 
Firefirey
 Post subject: Re: IGNITION COIL 1969
PostPosted: Mon Nov 14, 2022 3:47 pm 
Offline
848cc
848cc

Joined: Fri Mar 13, 2009 7:41 pm
Posts: 493
Location: New Zealand
drmini in aust wrote:
Its a Lucas 12H. 3 ohm no resistor.
I had a good run with Bosch GT40 instead on my S.


Should that be Lucas HA12
Top
 Profile  
 
drmini in aust
 Post subject: Re: IGNITION COIL 1969
PostPosted: Mon Nov 14, 2022 4:45 pm 
Offline
religious status
religious status
User avatar

Joined: Fri Mar 19, 2004 6:19 pm
Posts: 39752
Location: near Baulkham Hills, NSW
Firefirey wrote:
drmini in aust wrote:
Its a Lucas 12H. 3 ohm no resistor.
I had a good run with Bosch GT40 instead on my S.


Should that be Lucas HA12

Yea it is I had a brain fart sorry.

_________________
DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R. :mrgreen:
Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  Page 1 of 1
  [ 12 posts ] 

Board index » Mini Chat » Mini Chat

All times are UTC + 10 hours


Who is online

Users browsing this forum: No registered users and 70 guests

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Jump to:  

© 2016 Ausmini. All garage work involves equal measures of enthusiasm, ingenuity and a fair degree of irresponsibility.