I'm trying to determine-the Jaguar model that engine part number JLM-11344/N is intended for installation. I posted on the XJS and X300 forums and the most recent information there is that by the serial number (8C13937SA) it is intended for the XJ40. It is a 6.0, in a configuration I believe is designated "stripped".
Can anybody confirm the application or offer other information?
Niles

 

What kind of part is it? I saw a reference online for a JLM11344/R listed for a 93 and 94 V12, but no other information

Larry

 

It's an engine. In a crate w/o accessories, but as shipped from the factory way back when as a replacement.
Does anyone know what the difference is between JLM11344/R andJLM11344/N?

 

The site I saw it on was a remanufacter/rebuilder so guessing R suffix is rebuilt, N = new.

Larry

 

Okay, that makes sense. So it is likely a new 6.0 liter V12 to be fitted in a 1993 or 1994 XJ40 Jaguar.
Sound correct?

 

Yes, an engine for the XJ81, the V12 XJ40.

Larry

 

Okay then. The intent with this engine is to transplant it into a 1974 XKE. As it happens, a guy in town here is putting a 6.0 liter engine in a XJ series coupe. He has rebuilt the engine he pulled from a donor car and decided to bring everything up to current technology: individual coil ignition on a crankshaft trigger, programmable ECU, larger injectors on a center induction manifold, custom headers from England. So everything but the stripped engine is being replaced. I have a new stripped engine. The donor car? A 1994 XJ81.So I now have everything that will bolt on and electrically run this engine. distributor and control, induction including fuel rail, injectors and wiring, the ECU. Even the exhaust manifolds look like they will need only a short extension fabricated to mate to the XKE exhaust.
This may be the easiest engine upgrade ever and I'm perfectly satisfied with a Jaguar V12 6.0 liter, fuel injected totally stock engine in a XKE. Should be very nice indeed.
I'll probably start a thread in the XKE forum to track the progress.
Thanks for the help in identifying the engine.
Niles

 

Hi Niles,

That sounds like a great project!

One issue you may run into, if the V12 XJ40 is similar to the six-cylinder cars, is that the road speed signal originates with one of the ABS wheel speed sensors. The ABS Control Module passes this signal along to the Instrument Cluster to drive the speedometer, and the IC passes the signal along to the Engine Control Module so it can use this information to orchestrate appropriate gear shifts with the Transmission Control Module. Assuming you won't want an XJ40 Instrument Cluster in your E-Type, or for that matter to add ABS, you may have to devise a solution to this potential problem.

Cheers,

Don

 

Ahhh. The XKE is a bit more old school to bother with an electronic speedometer. It's mechanical drive from the transmission output shaft. The transmission in the car is a Tremac 5 speed that we installed a while back when the 5.3 liter engine was rebuilt. It is a good fit, 5th is overdrive.
That aside, I don't think the ECU will need anything on road speed with a manual transmission. Unless it does some fancy calculation for engine load based on road speed and throttle opening. I gotta believe that loading sense is based on manifold vacuum. Do you know if this ECU uses mass air flow as an input?

 

I'm not certain about the V12, but the 6-cylinder ECM uses the Mass Air Flow sensor (MAF), Engine Coolant Temperature Sensor (CTS), Intake Air Temperature Sensor (IATS), Crankshaft Position Sensor (CPS), Oxygen Sensor (O2S), Throttle Position Sensor (TPS), and probably one or two I'm not thinking of right now. It uses the vehicle speed and engine load signals (from the MAFS) to retard ignition timing during gearshifts. The manual at the link below may be helpful:

Jaguar AJ6 Engine Management Systems/OBD 1 Diagnostic Guide

Cheers,

Don