Hi,
I have a 2001 XKR Convertible with a seized engine. Crankshaft will not budge at all.
As I search for a replacement engine and consider my options, a couple of questions arise:
1. Is it possible to replace the 2001 engine with a later model year unit?
I.e., a 2002 or 2003? What about a 2004 or later 4.2?Are there any electronics or space/fit problems with later MY engines?
2. Is it possible to remove the engine and leave the transmission in the car, bearing in mind that I cannot rotate the crank and access all of the torque converter bolts? Will the torque converter just come off the transmission input shaft? Is this just a fantasy?

Thank you for any advice and counsel!
Charlie

 

1. Yes- has been done before and documented in a thread some tweaking is required to make it work.
2. Yes, TC will slide off- have you tried rotating both directions with force?

 

Thank you.
I have tried to rotate the crank in a clockwise direction with a breaker bar with a pipe extension with the most force. I pushed it counterclockwise but with less force. I'll try going counter clockwise with more behind it.

 

I bought an XJR with a couple of thrown rods and it was locked up- I pushed the crank back and forth until things were a bit looser and was able to turn it enough to remove the TC bolts. I later found a piece of a connecting rod embedded in the side of the motor!

Seller- "My wife overheated it, but it was turning over fine when we got it home, just wouldn't start" Sure buddy. I fortunately bought it at a price that reflected a parts car.

 

Does anyone know the bolt size of the threaded holes on the firewall side of the cylinder heads. I.e., the ones for attaching the lifting eyes during engine removal?

 

Update:
I have removed the engine and stripped it down to the short block. I took it to a reputable machine shop where two spun rod bearings are being fixed/repaired and replaced. Engine block has very low mileage and is otherwise in excellent condition.
I'm doing lots of parts washing and parts gathering in preparation for the upcoming reconstruction.

 

Good for you...I was going to suggest an LS1 swap.

 

I would be interested in the parts costs etc for this- please let us know.