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76van
 Post subject: What`s my motor ?
PostPosted: Wed Nov 24, 2010 6:43 pm 
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Location: blue mountains, nsw
hi,

have a 1275 in my van with cooper s head.

my engine number starts 12H902 which i believe is a LS1275 motor, it has the side cover plates with a breather off the plate closet to the radiator.

is this correct for ls1275 motor ?

many thanks
jayson
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drmini in aust
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PostPosted: Wed Nov 24, 2010 7:01 pm 
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If it's a 1275 with side covers, it's either a Cooper S block or a Clubby GT.
1275LS didn't have side covers, but they did have a breather on the timing cover and another on the flywheel housing.

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poeee
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PostPosted: Wed Nov 24, 2010 7:08 pm 
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Engine number says it shouldn't have tappet covers.

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drmini in aust
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PostPosted: Wed Nov 24, 2010 7:22 pm 
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poeee wrote:
Engine number says it shouldn't have tappet covers.

Haha... I've seen a 1275 auto with 998 number, Cooper S with 850 number.
Somebody might have had a 1275LS and their motor blew up... I'm not condoning this approach, just pointing out it does happen.

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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:
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Morris 1100
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PostPosted: Wed Nov 24, 2010 7:24 pm 
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It might be an 1100S motor. You know, the 1100 motor out of a Mini S. :lol:
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EST-071
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PostPosted: Wed Nov 24, 2010 7:27 pm 
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drmini in aust wrote:
Somebody might have had a 1275LS and their motor blew up... I'm not condoning this approach, just pointing out it does happen.

There is a 1275 in my mini with a 998 engine number :wink:
Cheers Pete

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76van
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PostPosted: Wed Nov 24, 2010 7:53 pm 
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interesting,it definately has side covers on the motor, this is what got me thinking it was odd that it has the 12h902 engine number.

could there be a bit of funny stuff going on ? i take it that`s what you`re alluding to dr mini

cheers
jayson


Last edited by 76van on Wed Nov 24, 2010 7:56 pm, edited 1 time in total.

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drmini in aust
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PostPosted: Wed Nov 24, 2010 7:55 pm 
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It may not even be a 1275- send us a pic of the block, from the front...

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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:
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Morris 1100
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PostPosted: Wed Nov 24, 2010 7:58 pm 
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A photo showing the engine number pad would be good. You can cover the numbers if you like for privacy.
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76van
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PostPosted: Wed Nov 24, 2010 7:59 pm 
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ok,will take a pic of motor tomorrow & email it to you.

will a 12g940 cooper s head go on anything besides a 1275 ?

cheers
jayson
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drmini in aust
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PostPosted: Wed Nov 24, 2010 7:59 pm 
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sure will, I had one on a bored out (to 1220) 1098 back in 1968. it flew... :P

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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:
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76van
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PostPosted: Wed Nov 24, 2010 8:15 pm 
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dr mini, when you say a pic of the block from the front do you me from grille side or radiator side ?

cheers
jayson
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Harley
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PostPosted: Wed Nov 24, 2010 8:46 pm 
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Grille side. Radiator won't give much away.
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76van
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PostPosted: Thu Nov 25, 2010 8:39 am 
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MY APOLOGIES EVERYONE.

motor has no side plates,don`t know what i thought i was looking at.so i guess it`s an LS1275 motor as per the engine number with a cooper s head.

thanks to everyone for thier feedback.
jayson
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poeee
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PostPosted: Thu Nov 25, 2010 11:18 am 
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It's not uncommon to have the extra head studs drilled and tapped.

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