Does anyone know what car a Jaguar V12 engine part number JLM-11344/N will fit? I'm not sure if it is an XJS or XJ12 or what year model it is compatible with.

 

The only thing I could easily ascertain it's that it's a 6 litre rather than 5.3

As for the original usage/application, I'm sure the info is out there with enough digging.

The part number has been replaced by JLM11344SE....which might help in your search

Others will come along with more info, I'm sure

Cheers
DD

 

Have you got an engine number? I think it will be stamped on the rear centre top, just aft of the end of the cylinder heads.

 

Right, 6.0 liter as I understand.
I'm thinking 1994 or 1995 XJS because I believe that was when the longer stroke 6.0 was introduced and it has the opening for the distributor. In 1995 they left the distributor behind on the X300 installation and went to coil packs triggered by the ECU. The X300 technical description indicates that the distributor drive shaft was removed at that time. My information is that 1995 saw no additional changes in the XJS V12 but I don't know what happened in 1996. When was the last year for the XJS?
I'll look for an engine number, but if its on the end rather than the top I may not be able to see it as the engine is still in the crate. I don't want to de-crate it until I know something about the application. The only identification on the crate is the JLM-11344/N.
Oh, yes I did see that the designation JLM-31144SE superseded the original number at some point.
Thanks
Niles

 

The engine number is right on the top rear of the engine. The other pictures are other identification on the crate. Does this help?


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Niles

 

if it is a 6.0L , that is the best of Jaguar V12s

 

8C engines were intended for the XJ40 I think.

 

XJ40 for sure
https://parts.jaguarlandroverclassic...-stripped.html

 

that picture is what some refer to as a long block assembly, not a complete engine
how many parts from a say 1989 would bolt on would need to be studied!
but time will tell, anyway it should make a great engine!
ron

 

Well, the plan has been to add fuel injection manifolds (I have them from a X300) and put it in a 1974 XKE in front of a Tremac 5 speed, We're finally getting serious about the project.The transmission is already in the car behind the original 5.3, which incidentally is running great now (16,000 miles on a complete rebuild) but I suppose there is always a way to improve.
The question is what to use for ignition. This engine is before the ECU driven ignition on the X300 V12 (distributor removed), so the first option would be to use what was intended, I think an electronic ignition thru a distributor. That's why I placed the inquiry on the intended application. It would certainly be the easiest route.

 

Yes, an HE engine distributor from a Lucas car would be the easiest. Be aware that the 5.3 and 6.0 engines have different bellhousing patterns. It is possible to bolt a 5.3 transmission to a 6.0 if some holes are drilled and tapped.

 

Lucas ignition, as used in the HE until about 1988/9 (when they switched to Marelli) would be pretty straightforward.
The best thing to do would be to pull it all off an intact car. It would all be bolt-on. In no particular order you would need from the donor:

• Injectors and injector loom
• Intake manifolds and injector rail (using the donor manifolds would be sensible as later manifolds are not drilled for 5.3 litre injectors)
• Air filter boxes
• The Lucas dizzy,
• The throttle capstan and TPS assembly,
• The ignition amplifier,
• The coolant sensor
• The air temp sensor
• Engine looms
• ECU loom. Note: this is a huge loom that goes back from the engine bay connectors right to the ECU in the boot.
• ECU
• Injector resistor pack
• Fuel pump relay and main load relay from the boot by the ECU and associated wiring looms.
• Balance pipe (if you use the donor manifolds this is all part of the intake system) and its associated vac line to to the ECU to give it a manifold depression signal.

 

Well. As it happens, an acquaintance is putting a 6.0 liter in a XJ series coupe. But he is doing the full monty on his. New custom headers and induction with larger injectors, tuneable ECU and coil pack ignition on a crankshaft trigger wheel. His donor car for the engine was a 1994 6.0 liter XJ40, or XJ81. What a happenstance. All of what I need was to be discarded: induction and fuel injection, ECU, ignition system, exhaust manifolds, the whole thing. I'm perfectly happy with a full stock installation of the engine. All I had to do was ask at my local British car enthusiast shop, Sports Car Shop in Eugene. So the only thing to work out is the bell housing adaptation ( I was told that the donor engine, while from a automatic transmission installation, had the seat for a pilot bushing in the crankshaft, I expect the new engine will as well), plumbing and fuel supply.
I think I'm under way on this thing.