Looking deeper into my 1968 Mk2 240/2.4. Trying to find out more info on how original it is but getting a tad confused as none of the numbers seem to tally with any identification lists I've found so far. Can anyone suggest which sites have the best source of information please?
Thanks
Ron

 

Mussie it is not a MK2 if it is a 1968--try saloondata.com. What are your numbers?

 

C24502/1c
728508
152446dn

 

So.... Is it called a 1 1/2 or 240? SNG and David Manners referred to it as a Mk2. Or were they being polite to an uneducated customer?

 

Those are not complete numbers. If it is 152446dn it is not a 1968

 

Right. Thanks for this. The plot thickens! This is why I think I'm having problems

 

This was on the right hand side of the block deep down. Manual said its where the engine number would be

 

That is a part number--what you need are the numbers off the data plate!

 

Brilliant! Thought I was being so clever. Should have stuck to playing with my mustang! The workshop manual said it was in this general area. Any idea where the informative numbers will be? Thanks for your help.

 

There should be a data plate in the engine compartment with engine, body, transmission, and car/chassis number! It is aprox 4 by 6 inches.

 

This is what it looks like? Ambla seats

 

Looks to be a 240/340 numbers?

 

Well from the pictures that is a 240 or 340 with the slim line bumpers.

 

The black surround on the Radiator grill badge tells you it is a 240. FYI, Black=2.4 litre, Red=3.4 litre, and Maroon = 3.8 litre. In theory there were only 240s and 340. but a few cars had the 3.8 litre fitted to special order. The 240 was the first time the 2.4 litre cars could exceed 100 mph. The engine has SUs instead of the old Solexes.

240s and 340s got the thinner bumpers too, that look similar to those on the S-type.

 

The respective numbers for your car should be on a plate attached to the bulkhead. It is 4 by 6 in size and is smack in the middle of the bulkhead under the starter solenoid. This will give you the Engines number, Chassis number, Gearbox number and a Body number.
Should this be missing the number are located elsewhere on the car.
The engine number is stamped in to the head and should be found at the front of the engine between the two can covers on the back of the chain cover. A 240 number should start with 7J have four number followed by a fifth number either a 7, 8 or 9 depending on the compression ratio. 8 was standard.
The chassis number can be found on the slam panel to the right of the hole where the bonnet catch goes. It can be stamped in but they have also been drawn in with a dremel. The chassis number should start with 1J unless it has power steering in which case it will be P1J. There will be four number followed by either BW if you have an Auto or possibly DN if you have a manual gearbox.
The gearbox number should be on a plate situated high up on the left side of the gearbox making it hard to see from under the car due to the gearbox tunnel. This should start with JBD if a manual, JBC for the old DG250 auto box but the 240 should be fitted with the BW35 auto box in which case the number will start with FG. Each will have four or five numbers behind.
Lastly the Body number for the 240 will start with 4J with four numbers. This can be found under the back bumper on a small tag that is riveted to the body work. Often removed during a restoration or painted over so difficult to read.
If you can find the chassis number try using this decoder, https://krissmotors.com/Mk2/?page_id=11749 for the rest of the details or if you wish to know more history of your car send the chassis number to https://www.jaguarheritage.com/archi.../certificates/ and they for a small fee will send you your vehicles birth certificate with all the original build details. Lastly most of the numbers you are looking for should be in your V5 it is just a question of trying to match them with the numbers you can find on your car.

Hope this assists.

 

Big THANK YOU to you all for your information and links. Had a good day squeezing my 6’ 6” frame into places it shouldn’t fit. Found the I’d plate well hidden in the engine compartment on the right hand inner wing at the rear of the suspension housing. Was just by chance as it was covered with years of grime. Is this a normal place?
Engine number is 7J2850-8
Gearbox JCN8191
Body 4J2814
Car No 1J2446DN
2.4 number on engine block

Carb Float chamber AUD2140
Carb body AUC1346
Carb lid AUD2277
What carb would this be in order to get overhaul kit?

Ron

 

Well done on finding the I/D plate. That is not where it should be as far as I am aware but I have a 3.4s and they might have changed the position for the 240. Having said that it must have been a nightmare for the old MOT inspector to find it which is why all the Jaguars I have seen have it right in front of you on the bulkhead.
So from your numbers you can tell it is a 2.4 engine from the 7J with 8:1 compression pistons. You do not have power steering and it is a manual car from the DN suffix. The 4J indicates it is a 240 in case someone puts a private plate on and big bumpers and tries to flog it off as a Mk2.

From the numbers you have quoted your carbs are SUs and possibly the smaller 1 3/4 inch H6 rather than the 2 inch H8. If you can put up a photo someone will confirm which ones they are but I think only the earlier Mk2s had the Solex carbs but please someone correct me if I am wrong.

 

The front inner right wing is where my ID plate is, and so are other 240/340's that I have come across.
Some left the factory with thick line bumpers too, like mine, they started out as MkII's, and finished as 240/340's.

There is another thread with much discussion on the matter of the 340's etc.
Here's one of them.

https://www.jaguarforums.com/forum/m...-104896/page2/

 

Mark 2 2.4litre cars like I had, all had the Solex vertical downdraft carburettors. The 240s changed to sidedraft HS6 1.75" SUs and also the cylinder head was changed from the 'B' type to the straight port 'E' type. A full twin pipe exhaust was also fitted. This increased power from 120 to 133 bhp, a useful increase that enabled the 240 to exceed 100 mph (about 105-106 was acheivable.

 

deleted - wrong thread