In a message dated 12/1/02 4:00:25 PM Eastern Standard Time, bbshriver@earthlink.net writes:
Can anyone give me the interpretation of numbers
LA9419-9 FD94
I need to know displacement, compression ratio, and anything else useful.
Hello Brandon,
LA9419-9, would be a 3.8, from a 1961 Mark2, originally fitted with 9:1
pistons. It should have a blue “B” type head (core plug in first position)
and twin HD6’s with a starting carb.“E” type intake manifolds will not fit
this engine.
I have a question regarding engine numbers. I have a head
with the number W6383-8S which matches the number on the
plate. The block number says C4820 and is a 3.8 liter
engine. I have been told there where no 3.8 engines for a
1953 XK120. Could this be because someone replaced the
block with a 3.8 in place of a 3.4 ? Thanks–
skip clemons
–Posted using Jag-lovers JagFORUM [forums.jag-lovers.org]–
This doesn’t list a ‘‘C4820’’ it’s probably ‘‘LC4820’’ which
comes from a 3.8L Mk2.
The 3.8 engine wasn’t introduced until the middle of the
life of the XK150.
So as you guess, someone has replaced the original 3.4L
block with a later 3.8L one. As the head wasn’t replaced it
was probably because there was a problem with the original
block. If they’d changed it just as an upgrade they would
probably have changed to a later head as well.
Cheers
Ken–
The original message included these comments:
I have a question regarding engine numbers. I have a head
with the number W6383-8S which matches the number on the
plate. The block number says C4820 and is a 3.8 liter
engine. I have been told there where no 3.8 engines for a
1953 XK120. Could this be because someone replaced the
block with a 3.8 in place of a 3.4 ? Thanks
In reply to a message from Ken Green sent Tue 11 Sep 2007:
Thanks, that is what I thought might have happened. I am
trying to find a distributor cap and there is some confusion
over what I need. Since I have a different block from a 3.4
in 1953 to a 3.8 I am not sure which cap I need. The
numbers on the distributor look like DVXH6A 40 996 but so
far no one seems to know for sure which cap I need. I do
know that it is the screw in type.–
skip clemons
–Posted using Jag-lovers JagFORUM [forums.jag-lovers.org]–
–Support Jag-lovers - Donate at http://www.jag-lovers.org/donate04.php –
Thanks, that is what I thought might have happened. I am
trying to find a distributor cap and there is some confusion
over what I need. Since I have a different block from a 3.4
in 1953 to a 3.8 I am not sure which cap I need. The
numbers on the distributor look like DVXH6A 40 996 but so
far no one seems to know for sure which cap I need. I do
know that it is the screw in type.