Engine numbers

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Malcolm
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Forename: Malcolm
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Engine numbers

Post by Malcolm » Sat Jul 18, 2020 11:47 am

Can anybody help, I seem to have 2 engine numbers...

The engine plate from my 1973 MGB has come detached from the engine. Fortunately I have the plate but the first number missing (corrosion). On researching the log book gives a very different number, can anybody help. The details are:
Engine plate (1)8V582(F)-H198 the number missing is the 1 and the F is stamped by hand and is not in line with the other numbers, almost an after thought. The engine number on the log book is 19843.
I am sure there is a reasonable explanation.. :!:

Malcolm

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Paul Scott
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Re: Engine numbers

Post by Paul Scott » Sat Jul 18, 2020 12:14 pm

Everything before the F is your engine type.

I would say 19843 would be correct.

Regards
Paul
1975 MGB Roadster
Webguru for MGB Register

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Michael Barclay
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Re: Engine numbers

Post by Michael Barclay » Sat Jul 18, 2020 7:35 pm

Hello Malcolm
I’ ll try and help with the explanation of your engine number plate.
18V - 1800CC Vertical in line.
582 - Engine type and correct for a 1973 car.
F -Twin carbs and crank venting.
H - High compression
19843 – Engine serial No
So your engine matches your log book.
Hope this helps.
Mike Barclay

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Michael Barclay
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Re: Engine numbers

Post by Michael Barclay » Mon Jul 20, 2020 7:39 am

Hello Malcolm
Forgot to add that 582F also indicates overdrive was fitted when it left the factory.
Best regards
Mike Barclay

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Tom Brearley
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Re: Engine numbers

Post by Tom Brearley » Tue Jul 21, 2020 8:30 am

Sorry to hijack this thread a little, but can anyone explain body numbers to me? I don't mean the chassis number or the commission number. I'm thinking of the number on the small rivetted tag on the inner wing. Thanks.
1973 MGB GT (Exeter) - currently shaking down after 3 years off the road

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Peter Cresswell
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Re: Engine numbers

Post by Peter Cresswell » Wed Jul 22, 2020 10:37 am

Hi Tom,
A simple question but one that has a complicated answer. A full and complex explanation can be found in Clausager's Original MGB book but I'll try and give you a flavour here!
MG didn't build the body shells themselves, in common with other BMC/BL plants the bodies were made centrally within the group. In the case of the MGB body shells were initially built at 3 locations - Bodies Branch, Coventry; Pressed Steel, Swindon; and Pressed Steel Cowley. Each of these had a letter designation as a suffix to the Commission Number - F for Coventry; P for Swindon and Z for Cowley. Eventually Coventry production was switched to Swindon and Cowley, and from 1976 all bodies were built at Swindon. There are many pictures of bare metal bodyshells being transported to Abingdon and then stored outside until they were used on the production line.
For the Roadster Coventry bodies had two identities. The first related to the Commission Number using the suffix letter and the second is the alloy tag rivetted to the nearside inner wing, which starts with the MGB letters prefix. This identity was not recorded by Abingdon and can't be used to identify a car for example to enable correct ordering of spares. It is simply a number given to the bare bodyshell as it was completed. MGB prefixed numbers started at 101. A second number without a letter prefix was stamped on a steel plate and welded to the offside inner wing and this started at 1. In both cases the numbering ran to over 110,000 (so 220,000 bodyshells). On Roadsters built from 1969, with Swindon and Cowley bodies only the MGB prefix tag is used and from the introduction of the Mark 2 cars the MGB letters are followed by a fourth letter for some export markets.
For the GT The system is much simpler with only one body number being used. This starts with the letters GBD and has a suffix letter P.
Eventually, of course all the information was incorporated into the VIN plate but this came very late in MGB production.
The bottom line is that it is the Car Number that is the usually required equivalent on the Chassis Number and it is this that should appear in the log book and not the number beginning MGB or GBD.
Pete
Pete
1969 MGB Roadster
2011 MG 6 TSE Magnette
2007 Mercedes SLK
Plus 32 other cars since 1965

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Tom Brearley
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Re: Engine numbers

Post by Tom Brearley » Wed Jul 22, 2020 12:19 pm

Many thanks Peter. As you say, surprisingly complicated!
1973 MGB GT (Exeter) - currently shaking down after 3 years off the road

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George Wilder
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Re: Engine numbers

Post by George Wilder » Thu Jul 23, 2020 9:20 am

Peter
Mk1 MGBs did not have a commission number.

The roadsters shell was built up from Pressed Steel Panels as you say at Morris Bodies Coventry and then painted and trimmed there. Such that when it arrived atAbingdon it had Screen hood and loosley fitted seats etc. This practice was repeated athe theother body assembly plants.

All MGBs were painted at the body assembly plant - no unpainted bodies were delivered to production at Abingdon.

George
George Wilder
1965 MG MGB Mk1
1995 MG RV8
2005 MG TF 135
1959 BSA D7 Bantam

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