Does anyone know what engine serial number 7d53300/8 (I know it is
a 8:1 compression) but don’t know if it is a 4.2 and if so, what
year.
TIA–
Angus Moss
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Angus;
From 7D50001 on was fitted to the '64-'66 MK X 4.2L. If the head
number matches, it is an “S” head.
Also, “other” 7D engines (I don’t have the number sequence) were
fitted to the '66-'70 420Gs… also a 4.2L with an “S” head.
Charles #677556.----- Original Message -----
From: “Angus Moss”
Does anyone know what engine serial number 7d53300/8 (I know it is
a 8:1 compression) but don’t know if it is a 4.2 and if so, what
year.
//please trim quoted text to context only
In reply to a message from BISHOP-13 sent Wed 7 Jan 2004:
Doesn’t every 4.2 have its displacement writ very large on the
inlet side as part of the block casting?–
Peter Crespin 94 X300 Daimler / 66 2+2 ‘E’
Buxton, United Kingdom
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In reply to a message from BISHOP-13 sent Wed 7 Jan 2004:
Charles, thanks very much for the information - once again, this
list is a font of ALL knowledge.
Regards.
Angus–
Angus Moss
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Angus;
You are welcome… Glad I was able to help…
Charles #677556.----- Original Message -----
From: “Angus Moss”
Charles, thanks very much for the information - once again, this
list is a font of ALL knowledge.
//please trim quoted text to context only
Peter,
The right side of the block in my 1984 XJ6 VdP and has "4.2 LITRE" and
“JAGUAR” on it. I can’t speak to other XJ6’s but my 4.2L Series II E-Type
also has this on the right side of the block.
Regards,
Paul Novak
1969 E-Type FHC
1984 XJ6 SIII Vanden Plas
San Diego, CA
@Paul_M_Novak----- Original Message -----
From: “Peter Crespin” jag@thewritersbureau.com
To: xk-engine@jag-lovers.org
Sent: Wednesday, January 07, 2004 6:28 AM
Subject: Re: [xk-engine] Engine Identification
In reply to a message from BISHOP-13 sent Wed 7 Jan 2004:
Doesn’t every 4.2 have its displacement writ very large on the
inlet side as part of the block casting?Peter Crespin 94 X300 Daimler / 66 2+2 ‘E’
Buxton, United Kingdom
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In reply to a message from Paul M. Novak sent Thu 8 Jan 2004:
Same on the S2 XJ6 engine I had and S3 I have now. Same on all 4.2s
I think. An easy clue for those size engines at least.
By the way, in case anyone’s interested, today I successfully
bolted up an S1 4-speed synchro gearbox and bell housing to my 4.2
S3 engine and turned it over using a 104 tooth old style (3.8?)
flywheel and Bendix inertia starter. I’d been told these parts
didn’t go together but mine do at least.
I’d rather use the pre-engaged starter that came with the low-miles
auto box, but would this same starter work on a manual 4.2 flywheel
which I believe has 133 teeth whereas the auto ring gear had 134?–
Peter Crespin 94 X300 Daimler / 66 2+2 ‘E’
Buxton, United Kingdom
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I am hoping the forum can help me identify the engine in my 420.
The engine has been changed at some point in its life but I cannot
identify from which car it has originated.
The engine numbers I have found do not follow traditional 420/4.2
engine number format though it is clearly a 4.2 as this is cast
into the block.
I have looked around the engine block and found a few numbers that
may help with its ID.
If I am looking at the wrong location could you please indicate
where the number is located.
The head gasket has blown and identification will assist obtaining
the right replacement.
Many Thanks & Regards
Terry–
Queeny
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Terry,
I think you are close with the number located on the flange where
the gearbox mounts behind exhaust manifold. In your email below you say is
says “198420-S”. But are there any other characters stamped on the flange
before those numbers like 7D (420, 420G, MKX), 7L (XJ6 S1), 8L (XJ6 S2 and
S3)?
Regards,
Paul M. Novak
1990 XJ-S Classic Collection convertible
1987 XJ6 Vanden Plas
1985 XJ6 Vanden Plas (parts)
1984 XJ6 Vanden Plas
1969 E-Type FHC
1957 MK VIII Saloon
Ramona, CA
P.M.Novak7@gmail.com-----Original Message-----
From: owner-xk-engine@jag-lovers.org [mailto:owner-xk-engine@jag-lovers.org]
On Behalf Of Queeny
Sent: Tuesday, June 07, 2011 6:07 AM
To: xk-engine@jag-lovers.org
Subject: [xk-engine] Engine Identification
I am hoping the forum can help me identify the engine in my 420.
The engine has been changed at some point in its life but I cannot
identify from which car it has originated.
The engine numbers I have found do not follow traditional 420/4.2
engine number format though it is clearly a 4.2 as this is cast
into the block.
I have looked around the engine block and found a few numbers that
may help with its ID.
If I am looking at the wrong location could you please indicate
where the number is located.
The head gasket has blown and identification will assist obtaining
the right replacement.
Many Thanks & Regards
Terry
//please trim quoted text to context only
In reply to a message from Paul Novak sent Tue 7 Jun 2011:
Hi All The plot thickens
I has inspected the head for an engine number and all I can find is
the number U443 located behind number 1 cylinder at the rear of the
head. On closer inspection the marks left by the head gasket
indicates the the combustion chambers do not align precisely with
the block/head gasket. I was wondering whether the head is from a
3.8 as I understand this was a mod to increase compression ratio.
Thanks Terry–
Queeny
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In reply to a message from Queeny sent Wed 8 Jun 2011:
Terry,
Not a good clue. Jaguar did not change the head casting when they
relocated the bore centers in the 4.2. The combustion chambers are
offset and offset in differing ways ‘‘by design’’. The factory’s
response to this bodge was ‘‘it does not matter’’. Is there a number
stamped on the block above the oil filter head ?
Paul–
The original message included these comments:
Hi All The plot thickens
I has inspected the head for an engine number and all I can find is
the number U443 located behind number 1 cylinder at the rear of the
head. On closer inspection the marks left by the head gasket
indicates the the combustion chambers do not align precisely with
the block/head gasket. I was wondering whether the head is from a
3.8 as I understand this was a mod to increase compression ratio.
–
PS
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In reply to a message from PS sent Wed 8 Jun 2011:
Some years ago I put together a list of engine number
prefixes for just this reason.
http://www.jag-lovers.org/xk-lovers/library/engine_numbers.htm
Your number 198420-S on the bell housing flange is the best
clue, but it doesn’t match the format we believe to be the
correct serial number. Try to get a more careful reading of it.
The number U443 at the rear of the head we believe to be a
sequential indicator of the casting date, but do not yet
have enough information to translate these.
There will be a casting number on the underside of the head
intake side.–
XK120 FHC, Mark V saloon, XJ12L Series II, S-Type 3.0
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In reply to a message from Rob Reilly sent Wed 8 Jun 2011:
Hi All
Some more information.
Have chipped some of the paint away from around the number located
on the Gearbox flange and have found a 7 infront of the 198420-S.
I am guessing the 1 in this sequence could be a poorly stamped L
which would make the number 7L 98420-S Does this make any sense
please.
From previous correspondence it could be a series 1 engine.
Your thoughts please.
Terry–
Queeny
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In reply to a message from Queeny sent Thu 9 Jun 2011:
7L is from a 4.2 litre XJ6, and the S might be an 8 which
was the way they used to indicate compression ratio.
Going on the assumption that they started with 7L1001-8,
yours would be the 97420th block made, which I think would
put it in the mid 1970s. You might check with the folks on
the XJ forum on that. xj6data.com has some near this number
in 1974.
They can also confirm this block casting number C34750FF.
The 26-10-73 might be a casting date for the block.–
The original message included these comments:
which would make the number 7L 98420-S Does this make any sense
–
XK120 FHC, Mark V saloon, XJ12L Series II, S-Type 3.0
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Thanks for sharing information in your blog