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ronniemac
 Post subject: Engine number
PostPosted: Wed Jun 09, 2004 12:28 pm 
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848cc
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Joined: Fri Apr 02, 2004 10:46 pm
Posts: 160
Location: Rockhampton
Can anyone tell me the what this engine is out of ?
Is it a normal 1275 or something more ?
12YDTaH7022.

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76 1275 Leyland S
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Meck
 Post subject:
PostPosted: Wed Jun 09, 2004 12:43 pm 
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Joined: Tue Mar 16, 2004 5:48 pm
Posts: 252
Location: Perth, WA
12YD/Ta/H 1275 ? Leyland 1275LS (12" Wheels)
http://www.hotbricks.org.au/files/engine.txt

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Matt
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bnicho
 Post subject:
PostPosted: Fri Jun 11, 2004 3:05 pm 
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1275cc
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Joined: Tue Jun 08, 2004 1:52 pm
Posts: 4434
Location: Melbourne, VIC.
Leyland 1275 LS start with 12H902.. That hotbricks site is wrong!

This engine number equates to a Morris 1100S

Morris 1100S actually had a 1275 engine from the factory. Even though the name still has 1100 in it.

Some Morris 1100S even have the same small journal crank and rods as a Cooper S! But they still have the solid block with no cam follower covers on the back.

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Brett Nicholson
Greendale (near Ballan) VIC.
1971 Morris Mini Moke
1966 Austin Mini
1965 Morris Mini Traveller
1973 LR Series 3 88
2007 LR Freelander 2
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Meck
 Post subject:
PostPosted: Fri Jun 11, 2004 3:09 pm 
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Joined: Tue Mar 16, 2004 5:48 pm
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Location: Perth, WA
Bugger... sorry 'bout that
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drmini in aust
 Post subject:
PostPosted: Fri Jun 11, 2004 7:05 pm 
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Joined: Fri Mar 19, 2004 6:19 pm
Posts: 39752
Location: near Baulkham Hills, NSW
Yep, BNicho is right. Morris 1100S. I run one in my car.

They have a small journal crank, it's cross drilled but is EN16 steel (not EN40B like an S) and use S rods.
I run an S crank in mine. Just had to play about with thrust washer thickness, otherwise it drops straight in.: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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9YaTaH
 Post subject: Not to mention the head!
PostPosted: Fri Jun 11, 2004 10:01 pm 
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Joined: Sun Apr 11, 2004 11:32 am
Posts: 12390
Location: Sthrn HiLoLands, NSW, Australia
8) probably also has a 12G940 "big valve" head - take off the rocker cover and check for the cast in number between the rockers..... :P

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drmini in aust
 Post subject:
PostPosted: Fri Jun 11, 2004 10:33 pm 
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Joined: Fri Mar 19, 2004 6:19 pm
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Location: near Baulkham Hills, NSW
Stock head on 1100S was a 12G940, with 33mm/29mm valves. Some heads had 12G938 stamped next to the thermostat (where most MK2 Ss had 12G1805 stamped).

Basic casting was the same for both, but the Cooper S had 35.6 intake valves.

Mine now has 35.6/31 valves...and BIG ports.. :wink:

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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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