matching numbers?

Technical advice Q&A

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alfred
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#1 matching numbers?

Post by alfred » Sun Jan 10, 2021 11:21 pm

Just a dumb question: should the engine number and the cyl head number match? I had an interested buyer look at my 68 2+2 and he said my cyl number was different so not original to the car.

thanks for the help.
1968 2+2

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PeterCrespin
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#2 Re: matching numbers?

Post by PeterCrespin » Mon Jan 11, 2021 5:55 am

They should match. where present, although cylinder heads stopped being painted and numbered in the later sixties.
1E75339 UberLynx D-Type; 1R27190 70 FHC; 1E78478; 2001 Vanden Plas

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mgcjag
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#3 Re: matching numbers?

Post by mgcjag » Mon Jan 11, 2021 8:45 am

This thread gives detailes from Jaguar hetitage trust of from what engine numbers the head stamo was ommited http://forum.etypeuk.com/viewtopic.php? ... cf#p110905
Steve
1969 S2 2+2 & Building a C type replica

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Robbiee
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#4 Re: matching numbers?

Post by Robbiee » Mon Jan 11, 2021 1:34 pm

I thought that the block number is the important match ...cylinder heads could be easily replaced and therefore wouldn’t have an engine number stamped
Robbie 1962 3.8 Coupe OSG 1962 OTS ODG

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alfred
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#5 Re: matching numbers?

Post by alfred » Mon Jan 11, 2021 4:16 pm

thanks, that cleared things up nicely.

Alfred
1968 2+2

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Philk
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#6 Re: matching numbers?

Post by Philk » Mon Jan 11, 2021 4:56 pm

Robbiee wrote:
Mon Jan 11, 2021 1:34 pm
I thought that the block number is the important match ...cylinder heads could be easily replaced and therefore wouldn’t have an engine number stamped
Ideally, Block, Cylinder Head, Crankshaft and Flywheel should all have the same numbers on them.... Unsurprisingly, the latter two are not often available . If you ever have your engine reconditioned get these photographed when it is stripped down - a really nice thing to add to the provenance of the car.
Phil
1964 S1 3.8 OTS

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Robbiee
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#7 Re: matching numbers?

Post by Robbiee » Mon Jan 11, 2021 6:07 pm

Yes...mine has everything but the flywheel stamped! I was rather delighted to see the engine number on the crank !
Robbie 1962 3.8 Coupe OSG 1962 OTS ODG

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mgcjag
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#8 Re: matching numbers?

Post by mgcjag » Mon Jan 11, 2021 6:26 pm

I saw a post on FB recently that showed a gearbox mount plate with the body number stamped in it....Steve
Steve
1969 S2 2+2 & Building a C type replica

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