Lotus Elan

Engine serial numbers rehashed again

PostPost by: loueelotus » Fri Oct 13, 2017 4:53 am

Hi .. I have been looking at threads here on the engine serial numbers and was wondering if there are any definitive answers on the matter.. I discovered that my Elan S2 1965 does not have the original engine serial number and read online somewhere that most of the older engines have exploded and just wore out.. Anyways .. I was wondering if anyone would have an answer on my numbers.. The original number was LP 3841LB for the engine orininally installed.. Now has LP 6181LB 4 bolt ..
Regards,
Lou
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PostPost by: Frogelan » Fri Oct 13, 2017 6:04 am

Hi Louis

Thanks for your post. I have a S1.5 64 Elan first registered in the US in 65. Its original engine number was LP2147.

I was looking at another car for sale recently which was the car with the chassis number immediately preceeding mine and found that there was a 200 or so difference in numbering. I think that it is possible to conclude that the numbering system was rather strange (probably some went off in batches to Ford?).

I'm not sure of the exact history of engine that I do have...there is no number...unless I cannot see it.

Do you happen to know where they are located on the engine?

Andrew
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PostPost by: alan.barker » Fri Oct 13, 2017 7:53 am

bonjour Andrew,
the number should be stamped next to the engine mounting
Alan
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PostPost by: trw99 » Fri Oct 13, 2017 8:55 am

The serial numbers for Lotus Twin Cam engines was sequential. However, not all Twin Cams went only into Elans, they were of course fitted to the Lotus Cortina, MkI Ford Escort Twin Cam, some Lotus 7s, the Lotus Europa and several Lotus race cars during the earlier series of Elans.

Neither was there any system in place for fitting the next engine in number sequence to the next Elan on the production line, so there is nothing to be made from one car having an engine number hundreds of numbers from the next.

Lou, Engine No 3841 was fitted originally into Unit No 4877. Engine No 6181 was fitted originally into Unit No 5886. 4877 was invoiced in July 1965, 5886 almost exactly a year later.

Andrew, Engine No 2147 was fitted into Unit No 4022 and invoiced in November 1964. Engine No 2342 was fitted into the previous car, Unit No 4021 and invoiced 13 days later than 4022.

In looking at the Elan records of this period it is best to concentrate on the known invoice date (in fact the only date we have for most cars) and to then batch them into working weeks. In that way we get a far more accurate idea of when cars were produced and when new series or fittings were introduced.

Tim
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PostPost by: Frogelan » Sun Oct 15, 2017 5:11 pm

Thank you Tim. Information is correct !

BTW I am originally from your area.
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