1275 head

[moggyminor16]

hi all well the traveller has been standing for some time as yet again had to go away and the trav sat about
she has started to leak oil from the rear oil thrower
so may decide to replace it again with a 1098 as want to change the diff and gearbox at some stage
i am asking will the head from a 1275 fit on to a 1098 as its unleaded
any answers greatfull
any tips would be greate for the running gear as need better top end
thanks all

[PSL184]

Yes - I guess it will be the 940 head. If you do a search on here you'll find all you need to know about checking for valve clearance etc. Remember to use a 1275 head gasket also....

[moggyminor16]

cheers

[flowersGTR]

just out of intrest will a 295 head fit on a 1275?

[PSL184]

It should do but you will have to do some work on a 295 to restore the compression ratio to something sensible....

[bmcecosse]

NOOOOOOOOOOOOO! A 295 head is ONLY for small bore engines - so 848/948/997/998/1098 ONLY.

[rayofleamington]

people have used 295 heads on large bore A-series, but it's really not worth the effort, as 940 heads are readily available, do a good job and are much cheaper

[bmcecosse]

I agree it would be 'feasible' - but a very retrograde step to go down on valve size and port dimensions! And since the chambers are relatively huge - the CR would be desperately low!

[PSL184]

The question was "will it fit".....
I didn't recommend doing so

[bmcecosse]

Ok Right - Yes It 'will' fit if you really want to strangle the performance - but I have never heard of anyone doing so!

[billlobban]

If youve got a 295 head flog it on fleabay they go for really good money more than enough to buy a 940

[bmcecosse]

Should buy quite a few - at this price! http://cgi.ebay.co.uk/ws/eBayISAPI.dll? ... K:MEWAX:IT - and -it's reddish! BUT - look at his postage cost! So either negotiate better postage (it's only ~ £15 by Special Parcels) - or arrange to collect.

[linearaudio]

Should buy quite a few - at this price! http://cgi.ebay.co.uk/ws/eBayISAPI.dll? ... K:MEWAX:IT - and -it's reddish! BUT - look at his postage cost! So either negotiate better postage (it's only ~ £15 by Special Parcels) - or arrange to collect.

Still thinking about this colour business- that one is proclaiming unleaded/ late Metro. Did Rover change the colour to signify the unleaded shift maybe? (green might have been more appropriate, but confusing!)

[bmcecosse]

Not that I am aware of! At least on a 1275 head you can see where seats have been pressed in - on the unleaded heads. On the 998 heads - no such thing! They just fitted harder valves - and said it was 'unleaded' !!

[mike.perry]

I know nothing about different number heads, 295, 940 etc. How do you identify which head is which, is there a casting number? Is there a table of different heads and what fits which engine?
Just trying to improve my knowledge.

[Declan_Burns]

Mike,
There are lists in the Owen Burton Modification manual.
Regards
Declan

[mike.perry]

That is not a publication which I have on my bookshelf

[PSL184]

This short list was posted previously by someone (sorry can't remember who now)

12g202 is the standard 1098 head (and mini cooper 997)

12g295 is the mini cooper 998 and midget 1098 head with larger inlet valves and improved porting

12g206 is half way between the 2

CAM4810 is a small bore (998) head off A+ metro or mini, some are unleaded but they have small valves and poor porting

12g940 is the 1275 head as fitted to all 1275s except some cooper S's which have special heads. Avaliable with 2 valves sizes, the later unleaded ones ('90 on I believe) are all small valved.
The number is cast into the head (rocker side obviously)

[Declan_Burns]

PM sent

[flowersGTR]

thanks for the response,
i have a 295 head off a 1098 midget, the inlet/exhaust ports from the head are larger than that of my 1275 engine. probly a combo of the 1275 being coked up and the 295 being ported. i was just wondering if it would be useful as the guy at minispeed offerd me £50 for it straight away after taking one look at it (is in a pretty sorry state atm) and the fact that it came off my uncle's 1098 midget that had a 731 cam, lightend and balenced flywheel ect revved to 7000rpm