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Ian Grace
United Kingdom
718 Posts |
 Posted - 07/10/2013 : 18:58:40
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I have a member with a 1930 Morris Minor. The numbers stamped onto the block are 992A, and underneath that is 72J.
Clearly not a Minor block, but is it M or J?
TIA,
Ian |
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Robin Hamblett
United Kingdom
536 Posts |
Posted - 07/10/2013 : 19:02:35
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Hi Ian. Any chance of a picture please. It's hard to tell just by reading numbers but the 72J suggests J type.
Regards
Robin
J2 J3666 & J3 3764 |
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Ian Grace
United Kingdom
718 Posts |
Posted - 07/10/2013 : 19:26:15
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Let's see if this works ...
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JMH
United Kingdom
936 Posts |
Posted - 07/10/2013 : 20:18:32
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Looks like a J2 number to me. According to the great man, that particular engine was originally fitted in J2399 (a car which does not have it's original engine).
Ian, your mates minor just took a price hike - does it have a cross-flow head too?
JH |
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Ian Grace
United Kingdom
718 Posts |
Posted - 07/10/2013 : 20:59:06
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Interesting - thanks. No, standard Minor other than the block it seems.
Any idea whan the 72 refers to? |
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Robin Hamblett
United Kingdom
536 Posts |
Posted - 07/10/2013 : 21:14:16
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I concur with Jeremy and the great man.
Regards
Robin
J2 J3666 & J3 3764 |
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JMH
United Kingdom
936 Posts |
Posted - 07/10/2013 : 21:15:11
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Ian,
72 is the model code for early J Type with crankshaft outrigger bearing.
JH |
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Ian Grace
United Kingdom
718 Posts |
Posted - 07/10/2013 : 21:53:46
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Thanks for that Jeremy!
Ian |
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Ian Grace
United Kingdom
718 Posts |
Posted - 07/10/2013 : 21:56:15
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| Maybe we can put the owner of the Minor and the owner of J2399 in touch? I have the contact details of the former. |
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Kts
USA
107 Posts |
Posted - 08/10/2013 : 05:13:13
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Interesting - I have a picture of the numbers on a block, they are 1019 J over 72 A. The numbers on the block in this thread are 992 A over 72 J. Why would the J and A be in different locations?
KTS
J3459 |
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Nick Feakes
USA
3590 Posts |
Posted - 08/10/2013 : 12:34:11
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Ian
I edited your post so the picture is displayed
Nick
Webmaster |
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Ian Grace
United Kingdom
718 Posts |
Posted - 08/10/2013 : 16:16:41
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| Apologies for the ignorance, but one more question - what is a crankshaft outrigger bearing, and how does this impact the block design? |
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Robin Hamblett
United Kingdom
536 Posts |
Posted - 08/10/2013 : 17:09:40
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Hi Ian
Later J engines had an additional bearing, "outrigger", in the front end of the front crank shaft housing. From chassis number 3574. I believe it was introduced to help combat the whip effect in the bent wire crank shaft.
Regards
Robin
J2 J3666 & J3 3764 |
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Ian Grace
United Kingdom
718 Posts |
Posted - 08/10/2013 : 17:21:47
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Thanks Robin,
So block 992 would not have had this outrigger? Jeremy seems to be implying the reverse above. |
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Robin Hamblett
United Kingdom
536 Posts |
Posted - 08/10/2013 : 17:31:10
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According to the engine numbering sequence published in the Triple M Register:
J 72 engines to 2500 AJ fitted up to J3573 and J 3438 1st swept wing car.
J 117 engines from 2501 AJ fitted from J 3574 with outrigger bearing
Hope this clarifies.
Regards
Robin
J2 J3666 & J3 3764 |
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JMH
United Kingdom
936 Posts |
Posted - 08/10/2013 : 17:46:08
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That's just me reading verbatium from the small print without my glasses on!
Code 72 without & code 117 with (as originally built). Most will have been retrofitted at some point though, Abingdon Service Sheet No 27 covered the fitting.
Incidentally, the "A" refers to std bore at build. There were a few that were "B" (10 thou oversize) at build & some overstamped "C" (20 thou oversize) at the factory after re-build. Dad never found anyone claiming to have a J block stamped "D".
JH |
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