Mini Mad
Posted 09 July 2016 - 12:50 PM
whilst robbing some bits of my pick up engine (as it has a standing seizure) may get sorted after this thought.
Found on the right hand side of the cylinder head at the back 1042 coopers HC
its an early cylinder head by the looks with heater take off left hand front.
no engine number unfortunately
Q is did coopers do a 1042 kit
Guest_minidizzy_*
Posted 11 July 2016 - 12:25 AM
By coincidence I have just corrected a post I made on a different thread having finally discovered the markings on my 'S' pack head, which I did not think existed but with enough light I could see in the place you describe.
1042, will be a serial number. Mine is in the 8000s. This does not reflect the number of kits made, which were far fewer, but may be more like a code. Mine does not have HC and I am not sure what that could mean.
Edited by minidizzy, 12 July 2016 - 10:27 AM.
Up Into Fourth
Posted 11 July 2016 - 01:42 AM
HC could mean High Compression? As above I'd guess the 1042 is a serial number for the head. Many engine builders will stamp their own identification number on heads etc and record the specs for future reference.
There is a Cooper conversions brochure here, with an example of the kits available. http://www.minipassi...Cooper 1992.pdf
There is a list of brochures on this site: http://www.minipassionmini.50megs.com/pictures/brochures.htm
Mini Mad
Posted 11 July 2016 - 06:51 AM
Hi GUys thanks
pretty much sussed HC part
1042 serial number ok go with that
would be interesting to know what cc and what type of A series engine it is
compared to Alice my other cooper ex works its quite a bit different
heater tap on head is on front left corner at an angle
Alice has front corner square at 90 degrees
block is closed at the back cannot access pushrods
Alice has two metal cover plates and vent
think this is an early engine but what one ?
is it actually a cooper works with this little amount of information
compared to Alices engine a whole array of different detailing numbers with date
Up Into Fourth
Posted 11 July 2016 - 07:12 AM
Sounds like a 12G940 head (if the heater is on an angle) which were only factory fitted to 1275 engines. The majority of 1275 blocks were solid over the pushrods (except the early Cooper S etc) so it could be 1960's to 1990's block. It should have a casting number on the block, refer to this link to find out...
http://minispares.co...rs.aspx?1~1~234
Guest_minidizzy_*
Posted 11 July 2016 - 10:08 AM
Cooper S engines from the sixties were produced by BMC/Leyland. John Cooper Garages only started selling conversions kits in the late eighties and initially only for 998cc engines. These were for A+ series engines. There were no 1275cc engines in Minis after 1980, when the 1275 GT was discontinued, until the Cooper RSP was released in July 1990, fitted with an adapted MG Metro 1275 A+ series engine. The Cooper 'S' Pack was developed alongside the RSP.
With the 'S' pack the heater tap had to be removed from the bulkhead and repositioned to the left-hand side of the cylinder head after first removing the heater take-off pipe. The heater tap on the 'S' pack (1275cc) is at an angle. The A+ series 1275 did not have removable tappet chest plates while the 60s and 70s engines did.
Moved Into The Garage
Posted 11 July 2016 - 11:07 AM
Mini Mad
Posted 11 July 2016 - 12:13 PM
it has wfm 1024 on top front of casting making it a 1275 a plus 11/16th oil pipe thread
would this be an early engine or later
great seeing all this info by the way
Mini Mad
Posted 11 July 2016 - 12:20 PM
with the markings on the head if someone has done a cooper conversion
what is likely to have been done and how would I know without stripping it down.
it has not had tappets altered.
have not had exhaust off yet to look at ports to see if they have been altered.
Guest_minidizzy_*
Posted 11 July 2016 - 03:56 PM
It depends whether it was a carb or injection engine. The carb engines date from 1990-91. From late 1991 to 2000 all Coopers (and from 1997 non-Coopers) were fitted with 1275cc injection engines.
You should not need to strip down the engine to find out what official Cooper conversion work was done. None of the conversions involved engine work below head level although the carb versions were given a 1.44:1 final drive and already had an MG Metro cam (if Rover had a enough in stock at the time the car was made). The rest of the conversion was mainly to fuelling, aspiration and exhaust.
The main feature of the Cooper conversion was the polished and ported head, developed with Janspeed. Other elements varied according to model.
The injection models retained the Rover injection systems and ECU but had a replacement exhaust back box. Some versions had high-lift rockers and/or lcb.
The work to the carb version was more elaborate as it replaced the single with twin carbs on a special manifold and it also replaced the entire exhaust system apart from the cat.
Oil coolers were often added except to the RSP, which already had one as standard.
As to whether the engine is early or late I believe it is about the difference between the carb/SPi version (1990-1997) and MPi (1997-2000). I cannot say off the top of my head what these are but the MPi had a different alternator position and no dizzy.
Edited by minidizzy, 11 July 2016 - 03:57 PM.
Moved Into The Garage
Posted 11 July 2016 - 07:28 PM
Mini Mad
Posted 12 July 2016 - 06:01 AM
hi
it has a carb and lamda sensor on exhaust so presume this is a 1990 ish engine
as to cooper works will have to check see if it has been ported once the ex is off
turns over lovely now after a gently bit of easing with diesel and a soak in oil
thanks for the info again
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