Quick question. I have a 2011 XJL Supercharged in my garage. The car needs a motor and I'm trying to weight out my options. Should I go and buy another motor and swap it, or should I try to fix whatever is broken in there.

I know very little about these engines, but I can fix anything I want, so the learning curve is not a problem for me. I'm mostly interested to know if there was any difference in the engine between the supercharged version and the NA one.

Can I just put in the NA motor instead? And if not, can someone tell me what is the difference? Is there a diff in the head? Timing components, or different performance parts for the supercharged version? Hard to find this info online.

Thanks in advance,

Andre

 

Welcome to the forum Andre, when you get a moment stop by our new members area.

The pistons are different between the N/A and S/C engines, which changes the compression ratio. The rest is the same.



No way to use the N/A engine in a S/C car the compression will be way too high, unless you swap the pistons out...

If you are having trouble finding a second hand engine, you could also use the 5.0L engine from an XKR, XFR (or XF-SC), F-Type V8S or R, Range Rover Sport or Range Rover Vogue.

Good luck.

 

How many miles are on the car? Is out of factory warranty?

 

Not only are the pistons different, but the heads are different as the entire cam mechanism is different between the NA and SC engines. Also, the ECU programming and TCU transmission programming differ also. Not to mention the braking system on the SC has different size rotors and calipers and then there is the suspension tune that is different.

 

Thanks for the info guys.
The car has about 80K miles on it. The warranty is invalid on that car.

I will try to fix the engine once I know what is wrong with it, but some kind of manual would help. I don't even know if they sell repair manuals for cars like this, as all my other restoration is for older (90's) cars.

I only need electrical diagrams and engine manuals. Everything else I can handle, so there should be no problem.

 

I have to say it worries me that a 2011 XJ needs a new engine. So what went wrong with the one that Jaguar installed at build time ?

At only four years old, I would be in contact with Jaguar on this one. It's only a year out of warranty, for heavens sake !

 

The 2011 had the 5 year /50,000 warranty.

The 5.0l NA has different cooling routing compared to the 5.0l SC engine

There is a place in Wilmington CA that is selling a NA engine with low miles. It is listed in craigslist .com

 

So one has to assume the car has done more than 50k miles, but even so, a engine knackered at four years old is not a good advert for Jaguar longevity.
However until the OP gives us more information one cannot comment any more.

 

+1 (so far it could have been loss of coolant or oil, for examples)

 

Sorry this post got stuck in the spam filter (new member).

All this information is available from Topix

https://topix.jaguar.jlrext.com/topix/user/loginForm

Sign up and get yourself a 1 day subscription, download everything you need. All the information available to Jaguar dealers is on that site, wiring diagrams, work instructions, the lot.

 

Jaguar will not help you out with warranty if the engine has 80k on it. First you need to figure out what is wrong with the motor and go from there. Take it to a dealer and find out what error codes are being displayed. If it is only top end or fuel, fix it. If it is in the bottom end, consider replacing. To rebuild the engine, you will need to buy some specific Jaguar tools (ex timing chain locating tools), gaskets, parts etc. gets expensive fast. There is a video on YouTube showing a motor being removed from a Late model Jag. They removed the engine by raising the chassis and LOWERING (dropping) the motor.



If the motor overheated, I would suggest replacing the transmission fluid too. It could be cooked. Cheap insurance.

I like tackling challenges too. Take your time and you will rewarded.

 

Hi. Thanks for the info. I just got the car to my house garage, and it seems there is nothing wrong with it. I purchased the car on auction for $14k, so I assumed the engine was bad, but it seems they ripped the fuel line on the bottom of the car and did not bother to start.

The key needed a new battery, so they did not even crank the car. For the price I figured a can just put a new engine, but so far I'm not sure I need one.

I did not have a Jag for 12 years. Car is outright gorgeous. Congrats. I needed something normal as my daily driver is a Supra

Will keep you posted.

 

If it runs with just a few cheap fixes you have a real bargain!

 

It seems the engine ran without oil. Everything seems to be OK minus what is on the picture below. Do you guys know if this is fixable, or I basically need a new block?

 

Most definitely, IMHO, not repairable. My suggestion would be a short block if you can confirm the heads are not warped and that oil starvation has not damaged bearing surfaces.

 

Engine is fixable, but the I can't get the parts for that engine. I need new piston rings, and main bearings along with valve seals. Everything else I can fix.

You guys know if it's possible to get these? I talked to lots of dealers and they say NO.