Dude has a 5.0 though

 

The 4.2L and the 5.0L are common blocks. Can't the dealer ask Ford in Michigan, for a new block and not much more. There might be one in inventory.
One of the best Ford rebuilders in the USA, is Dave' Auto Center, in Utah. To drop a name of a, rebuilder.

 

Dave's shop is about 15 miles from my house, I know all about Dave.

 

Nicest machine shop I've ever seen.

 

WTF are you talking about???
The 5.0 (AJ133) was a clean sheet design and has almost nothing in common with the 4.2 (AJ33 / AJ34)!

 

I agree with Stuart S, more or less. Unless you have a relationship with an excellent Jaguar mechanic and can negotiate a favorable fixed price, shop for a replacement XK.
Take your time and find a great deal on what best suits your fancy. Be it XK or XKR, find the lowest miles, best maintained example that is budget able.
Xalty, the professional, recommended against rebuilding, the same concept may be applied to engine replacement.

PS: "Sell it for parts", I take to mean sell it as-is. Parting-out a vehicle takes a long time and is too much work (IMHO).
Plus, someone so inclined may bring your baby back to life.

Keep us posted on your solution.

 

So the Mustang 5.0L has nothing in common with the Jag 5.0L. Block and pistons only of course? Just a coincidence then?

 

Correct.
Completely different engines with zero parts in common, different bore and stroke and slightly different capacities.
It is sheer coincidence that they are both 5.0 litre (roughly) 90 degree V8s with four valves per cylinder and quad camshafts, and that's about all they have in common.
Many people think they are the same engine but it's a myth that just won't die.
Largely due to the fact that Ford sold JLR to Tata in 2008, the AJ133 came out in 2009 and the Coyote 5.0 came out in 2010/11.

 

LoveMy2010XK I would be afraid to take a chance on that $2500 engine as that's on the very low end and as posted it has a lot of miles. 125K miles would be fine if you knew the history of the car it came out of but we do not.

Can you tell us what budget you have? As posted above if paying to have this done it will run into a lot of money as you uncover additional stuff. And there will ALWAYS be additional stuff!
Have you looked for shops to ask about cost?

Yes the improvements listed seem good on that rebuilt 5.0L NA but I don't know anyone who has purchased a rebuilt unit yet?

Please listen to OZ as this old wives tale just won't die.
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oil cap and drain plug. that's it

bores spacing happened to be the same and their backup plan was to make GDI heads for the 5L modular, before the recession hit they were getting their toys taken away. their updated V6 project got cut and they were being begged to shove the volvo short i6 in the XF.

 

5.0s have Oil Drain Plugs???? Huh, I've never seen it.

 

I assume you're joshin' but just in case you aren't, yes the AJ133 (and AJ126) has an oil drain plug in the bottom (side) of the sump.
Initially I used it to drain the oil on my 2010 XFR and then on the F-Type but then I read up a bit more on using the top suction tube method so I gave it a bash, it worked so well and is so much easier I will never go back to the drain plug method.

 

I think Cee Jay is just stirring the pot and having a bit of fun!!
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What they don't have are dipsticks...

 

The 5.0 and 3.0 litres designed by Jag and Ford and built by Ford, in Bridgend Wales, the previous 4.2 AJ was also built in the same plant however the Ford version of this engine used in Lincolns was made in the States, same with transmissions, the ZF versions were used in Jags and the Ford/Lincoln versions were licensed by ZF but manufactured by Ford in the States.

But yes, I've even met mechanics who believed Ford manufactured everything and shared engines with the 2 marques...

 

Were it me, I would settle on the shop that is doing the repair(s) and ask them to make the call and discuss the right motor. To me, they are more equipped to discuss what comes with it (is it a long block, a short block, heads, accessories?) If you go this route...again, were it me, I would pull the original motor and send it to a machine shop. Let them do the planing, etc. Then, have the shop doing your work go through putting the motor and accessories back together. While the motor is out, do all the important stuff, seals, gaskets, water pump, coolant lines, plastic bits.

Now, all of the above said...there is a sweet looking 2012 XK w/66K miles for under 20K sitting on FB marketplace. I thought about getting it for myself but don't want to deal with trying to sell mine (later). I have too much labor of love into mine. And who needs two XKs of the same year?

Best of luck to you in this. I know it isn't fun thinking through this, but the way I see it...transfer as much responsibility and risk to whoever you are paying for the work and expect a completed project with no stories. Or, buy a replacement and part out yours. I could use some bits I suppose.

 

@Speedmaster There's a good chance there's more wrong with this engine than warped heads. He mentioned it was seized. Personally I don't think it's worth the effort, cost and RISK rebuilding when there's working XKs available for about what it would cost to repair this one.

 

I missed that part. Fully agree then. Unless there is another reason that we are unaware of, time to move on from this car and find the replacement.

 

Not recommending, but if a remanufactured engine is being considered, JLR does offer them:
https://www.jaguarusa.com/content/da...Digi_TRADE.pdf

 

Is it crazy to consider putting a low mileage 2010 XKR engine in my 2010 XK? If not, what should I watch out for to be sure it is done right compared to a NA 5.0 swap?