looks like my 98 XJR nikasil engine may be at an end. I'm potentially in the hunt for a replacement engine. What modifcations need to be made to a 2000 or 2001 xjr engine to run in a 98? Is it better to keep the original supercharger (assuming it's OK), or swap that as well? finally, are there any good resources for finding xj engines? I'm having trouble finding anything under 5K. thanks![sm=boohoo.gif]

 

stick with a 98 or 99 XJR engine(aj26) heads have one cam sensor.. if you get a 2000-2003xjr engineheads have 2 came sensors (aj 27) the heads are different and they wud have to be swapped over.. and font of engine wud have to come off. to remove chains. and such

 

Not sure where you're at or if you're even interested but I have the old engine from my 01 XJR. It had 54K on it and either dropped a valve or the chain jumped, not sure exactly but the block might be reusable. I haven't tore into it yet.

 

Sounds like a plan. Get the motor....swap the heads and chains....put new tensioners in there....and off you go...

 

i found a guy that will do the modifications on 2001 XJR engine (about 50Kmiles) to make it run with a 98 ( he's done this before) - and ship it to me w/supercharger for $5K. It's a bit steep, but it would be nice to not have to put in another Nikasil engine. I'd settle for a low mileage 98-99 too. Also plan to check with chasman..

 

I assume these are all used engines. I have a rebuilt for just $1000 more. $6000 for rebuilt with steel sleeves instead of Nikasil and latest timing components. 0 mileage engine.

 

Any warranty Ken?

 

is it a 98 engine block?

 

12 months, unlimited mileage

Core charge is $500 additional. Freight can get expensive because you are looking at two directions to get the core back. That depends where you are. We just put the customer in touch with the freight company since we don't make any money there.

It's comes with timing cover with all new timing components, includes oil pan can cam covers. Does not have manifolds, waterpump, etc. Sleeved cylinders and rebuilt heads.

 

AJ26 or 27 I think he was asking. Harness is different between the 2.

 

Right, there are actually four engines from 98 to 03. You have VVT's in the timing cover with one or two oil pressure sensors by the oil filter and VVT's in the valve covers with one or two pressure sensors by the filter. Believe me, it was expensive, but we've learned! The single pressure sensor engine are very rare.

 

Ken,

I thought the XJR supercharged engines didn't have VVT?

 

they dont.

 

I have very little experience with S/C engines, so I'm interested to learn the differences. As far as swapping a long engine, the only thing I can think of that makes sense is the holes in the front of the structural sump for the oil cooler feed and return hoses. Only S/C has those, the bosses are cast into the N/A sump but not drilled.

The timing cover and cam covers on AJ26/ AJ27 S/C should be the same, as genius says neither has VVT.

The switches Ken is talking about is one of the many key differences on AJ26/ AJ27 N/A: the second switch is an oil temperature switch which must be used in conjunction with the AJ27 V V T's. So the structural sumps are different between these two engines for sure, along with RH head, timing cover, cam covers, and alot more.

Of couse the biggest deal is pistons, the S/C compression ratio is lower.

 

n/a have the holes for superchager cooler lines just have to piston like sleeves like on a xj6 oil bypass .. and has four orings with a "H" cover .

 

I was only on the n/a engines. There are two versions of the supercharged. Easiest way to tell them apart is if you have one are two cam sensors. Then the S-type v8 is different, too!

What ever happened to keeping it simple?

 

does the guy own a company cause i am looking for a new engine as well for my 99xjr with the 7 vin number being an 8