Cylinder Head Numbers

Talk about the E-Type Series 1

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garcormack
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#1 Cylinder Head Numbers

Post by garcormack » Sat Feb 16, 2019 8:49 pm

Dear All

I don't believe my cylinder head is original to the car (1963 series 1 3.8 fhc) and guess that the numbers/letters on the head could help identify its origins.

The numbers/letters are

ZB-3445-8 at valley front
A in valley middle
AA476 at valley rear.

Could anyone help or point me in the right direction?

Many thanks

Gary

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cactusman
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#2 Re: Cylinder Head Numbers

Post by cactusman » Sat Feb 16, 2019 9:45 pm

Pretty sure original heads are four digit numbers prefixed by R or RA. My 62 car is R5xxx....others will know for sure though. Pretty certain there are engine number lists in the knowledge base but can't seem to find them for the moment......David...help :bigrin:
Julian the E-type man
1962 FHC
1966 MGB....fab little car too

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rswaffie
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#3 Re: Cylinder Head Numbers

Post by rswaffie » Sat Feb 16, 2019 10:19 pm

I think that head may be from a MK10.
Richard

S1 3.8 FHC Opalescent Golden Sand with Tan Trim 889504
Now running-in my diy nut ‘n’ bolt restoration. :wrench: :hammer: :fingerscrossed:

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Geoff Green
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#4 Re: Cylinder Head Numbers

Post by Geoff Green » Sat Feb 16, 2019 10:44 pm


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garcormack
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#5 Re: Cylinder Head Numbers

Post by garcormack » Sat Feb 16, 2019 11:09 pm

Thank you all

The ZB prefix implies a Mk 10 although the A designation doesn't support this. The 8 at the end does suggest an 8:1 compression ratio.

Gary

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christopher storey
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#6 Re: Cylinder Head Numbers

Post by christopher storey » Sun Feb 17, 2019 9:24 am

The A and the AA number will merely be a foundry batch identification , and has no significance at all. Definitely a 3.8 mark X head . Note that the -8 may not be applicable any more ; the CR is determined not by the head, but by the pistons i.e. the heads are identical irrespective of the CR of the engine, the small domed pistons being 8:1 and the large domed pistons 9:1
Last edited by christopher storey on Sun Feb 17, 2019 9:27 am, edited 1 time in total.

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garcormack
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#7 Re: Cylinder Head Numbers

Post by garcormack » Sun Feb 17, 2019 9:26 am

Thank you Christopher

Much appreciated

Gary

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christopher storey
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#8 Re: Cylinder Head Numbers

Post by christopher storey » Sun Feb 17, 2019 9:28 am

Gary : note that I have added info about the CR, which may or may not help you !!

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Sarthe72
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#9 Re: Cylinder Head Numbers

Post by Sarthe72 » Thu Feb 21, 2019 12:08 pm

R1798-9 is the correct number on mine. VSE had (but no longer of course) blank new heads they machined and stamped with your correct number if you wanted. I don't know of anyone making new cylinder heads today, but I am sure someone here does.

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