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| Another engine ID Question https://www.ausmini.com/forums/viewtopic.php?f=2&t=31941 |
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| Author: | tom [ Sun May 20, 2007 5:58 pm ] |
| Post subject: | Another engine ID Question |
Hey all was wondering if anybody could help me with identifying my block.Its a 1275 without side plates with the number 12yd/ta/h16158.Am i even reading the right number,this is stamped where the head gasket sits.there is another number on the back that is12g G1279.Any help will be great thanks |
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| Author: | Mick [ Sun May 20, 2007 6:05 pm ] |
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Non-Cooper S 1275 engine. The other number is a part number. |
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| Author: | tom [ Sun May 20, 2007 6:18 pm ] |
| Post subject: | |
Any idea of the age/time of build |
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| Author: | EST-071 [ Sun May 20, 2007 6:24 pm ] |
| Post subject: | |
It is from a 1275 LS, so I think it maybe a 77 - 78 vintage motor. Cheers Pete |
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| Author: | tom [ Sun May 20, 2007 6:29 pm ] |
| Post subject: | |
Wow awsome thanks so much guys thats a big help |
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| Author: | Morris 1100 [ Sun May 20, 2007 7:38 pm ] |
| Post subject: | |
It is not a 1275LS engine. 
It is a Morris 1100S engine from about 5/69. 
12 = 1275 Y = Australian (1275LS engine was fully imported and didn't have a Y) D = 4th variation = 4.1 final drive ratio = Morris 1100S (1275LS didn't have this diff ratio) Ta = Std ratio remote centre change. H = High Compression 16158 = 15158th engine off the line. (one of the very last Morris 1100S) (The first engine was 1001) The 1275LS has an engine prefix with 12H902UH, nothing like the 1100S. 
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| Author: | Hanra [ Sun May 20, 2007 8:04 pm ] |
| Post subject: | |
We need to have like a sticky post of body numbers and engines numbers or something, cause this question gets asked quite a lot. Im sure there is enough information out there to create one post with all the info needed? |
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| Author: | simon k [ Sun May 20, 2007 8:34 pm ] |
| Post subject: | |
Morris 1100 wrote: It is not a 1275LS engine.
It is a Morris 1100S engine from about 5/69. 12 = 1275 Y = Australian (1275LS engine was fully imported and didn't have a Y) D = 4th variation = 4.1 final drive ratio = Morris 1100S (1275LS didn't have this diff ratio) Ta = Std ratio remote centre change. H = High Compression 16158 = 15158th engine off the line. (one of the very last Morris 1100S) (The first engine was 1001) The 1275LS has an engine prefix with 12H902UH, nothing like the 1100S. High compression 'eh - that'd have been a good one back then. Would be a large journal crank too. |
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| Author: | cush [ Sun May 20, 2007 8:37 pm ] |
| Post subject: | |
sweet engine... |
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| Author: | simon k [ Sun May 20, 2007 8:42 pm ] |
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cush wrote: sweet engine...
yeah, but heavy condrods.... I've got some on my bench next top some S ones... 4 S ones weigh the same as 3 of those LJ ones |
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| Author: | Morris 1100 [ Sun May 20, 2007 8:44 pm ] |
| Post subject: | |
skssgn wrote: Morris 1100 wrote: It is not a 1275LS engine. It is a Morris 1100S engine from about 5/69. 12 = 1275 Y = Australian (1275LS engine was fully imported and didn't have a Y) D = 4th variation = 4.1 final drive ratio = Morris 1100S (1275LS didn't have this diff ratio) Ta = Std ratio remote centre change. H = High Compression 16158 = 15158th engine off the line. (one of the very last Morris 1100S) (The first engine was 1001) The 1275LS has an engine prefix with 12H902UH, nothing like the 1100S. High compression 'eh - that'd have been a good one back then. Would be a large journal crank too. As far as I know they were all high compression. (there is no low compression number listed in the books)
Crank journal dia. changed at engine number 10488. |
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| Author: | drmini in aust [ Sun May 20, 2007 8:48 pm ] |
| Post subject: | |
Yes they called it high compression, but `twas only 8.8:1. hardly what I would call HIGH.. 
Nothing some decent pistons won't fix though.
1100S with those heavy rods I would hardly call a `sweet engine' cush. Maybe after the rods are hacked, the crank wedged, and the flywheel sent to Jenny Craig... |
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| Author: | 9YaTaH [ Sun May 20, 2007 8:53 pm ] |
| Post subject: | Wait |
drmini in aust wrote: Yes they called it high compression, but `twas only 8.8:1. hardly what I would call HIGH..
Nothing some decent pistons won't fix though. 1100S with those heavy rods I would hardly call a `sweet engine' cush. Maybe after the rods are hacked, the crank wedged, and the flywheel sent to Jenny Craig... I always thought the 1100's were panned for having too heavy rods and too light pistons....so they tended to flap about 
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| Author: | drmini in aust [ Sun May 20, 2007 9:02 pm ] |
| Post subject: | |
Morris 1100 rods and pistons were fine. But the 1100S rods weigh a bloody ton, these have a big lump on the caps for God knows what reason. When the A+ rods replaced, them, surprise!! No big lumps..
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| Author: | cush [ Sun May 20, 2007 9:06 pm ] |
| Post subject: | |
skssgn and the doc of the heavy rod alliance wrote: Why, grandma, what big rods you have....
All the better for reshaping with... 
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