I prefer out the top on xk's as you can easily access the engine to trans bolts and about everything else. Most others i prefer out the bottom for the same reasons

 

With the engine out, we can see that several rubber parts degraded from oil exposure. Aside from the blow-by the engine also leaked oil from one of the heads. Oil cooling hoses, an intercooler hose, and a sway bar mount will need to be replaced. We already have the sway bar mounts since we knew about that one. Oil has gotten onto the power steering unit as well, but it performs well and will be cleaned up with the rest of the engine bay.

When you buy an XKR off of eBay for only $8600 like I did, you know that you're going to be in for some repairs!

















As you can see, it is time for this engine swap to be done! Bring on the 42,000 mile 4.2 liter... AW, YEAH!

 

Jeff, that pic of the shot sway bar bushing. Looks like the very common leak from that slip on fitting above it thats the power steering cooler line where it connects to the metal pipe. You cannot replace that without replacing the entire cooler. Theyre not fun nor cheap. But, you can cut that fitting off the hose and slip it back over the metal pipe with 2 hose clamps and will work great for yrs without issue. The choice is yours. I know you have issues with oil in the intake box, but you can also see that its very clean around and under that fitting. Oil gets dirtier and attracts dirt and power steering fluid(atf) is highly detergent and a cleaner which is why its cleaner

 

This is a good time to replace the front subfarme & engine mounts as wel.

 

Jeff, my 03 STR (4.2 s/c) has both the Mina intake and modded air intake tube. As you're already aware, these will allow the motor and blower to both breath and whine. It's intoxicating and approx. 24 rwhp. Not that you'll need anymore hp with the 600+ chp you'll soon recieve, it will enhance and/or compliment your new 4.2 twin screw.

Oh, by the way, though the 4.0 s/c was no slouch, you'll love the 4.2 s/c's superior powerband. Mine has 140k miles and still going strong, no oil leaks, burns only a little oil. Friggin excited for your results. Avos is a hair away for an STR twin screw.

 

I've got an AVos-designed full-custom 3.5" intake that will mate up to AVos' custom made 90 mm throttle body. The intake is massive and has a custom AVos programmed 3.5" MAF which is fed by a massive K&N cone filter that fits behind the front bumper. Thank God for AVos and his insane quest for powah!

 

After we get this beast up and running, any of my fellow Jag lovers that come to the Tucson area are welcome to contact me, then I'll take you for a ride so that you can see what AVos' kit is all about. =)

 

C'mon Jeff. Get the thing going and give us a report. The whole board is on the edge of their seats!

 

Where are our updated pictures??/

 

The folks that sold the 2003 supercharged 4.2 engine to me removed the steering pump pulley, alternator pulley, and AC compressor pulley. Does anyone have those available?

I am in Tucson, Arizona USA.

 

When I put a 4.2 in my car I used all my stock pulleys.What is different?

 

My techs said that they needed the 4.2 pulleys. I had heard that there was a pulley upgrade after the 4.0 and I had told them awhile ago to perform that upgrade. Regardless, they said that they need them so, I'm on a hunt.

 

You can just use the 4.0 pulleys even though they have 1 extra groove (for the 7 rib belt on the4.0), the new 6 groove belt you need to use with the lower 4.2 pulley aligns perfect with the others. I have been running like this for many miles now,and have not experienced a belt jump.

You must also re-use the 4.0 aicro & steering pump and fead belt tensioner. Just reuse the brackets from the 4.0, and cut off excess material from the front cover (where the bracket of the 4.2 belt tensioner resides to), so it looks the same as the 4.0 cover.

Last but not least, you need to use the K060935 fead belt.

 

Thanks, AVos! I asked the techs to proceed using your advice.

 

It’s not the neatest solution obviously, and can understand it would not be the 1st preference for a professional shop (and I was hesitant as well to do it this way), but it does do the trick

 

The old engine's oil leaking and piston blow-by oils sure did a number on the rubber hoses under the hood! If you guys have any kind of oil leaking, it would be smart to deal with it NOW. The delay in completing the engine swap and twin screw install is due to finding that we need to replace oil cooler lines and other hoses that were degraded from oil exposure. Ugh. We'll get there!

 

The 4.2 liter engine is now in place, ready to accept the peripheral goodies. You can see the new motor mounts in one photo. 2 other photos show how oily the old 4.0 is as it sits nearby. The preliminary estimate is that it will be ready to drive on Friday, if no glitches show up. Of course, that means that it will probably be ready to drive next week around Wednesday or so. Hah! Tomorrow's work will have the fuel pressure regulator tapped into the fuel rail with a custom machined gizmo. These techs have a machine shop and quite a set of skills!

One of the original motor mounts had leaked out its oil and the other was a bit degraded as well, allowing the engine to sit 3/8" lower than normal. We'll now see how tight of a squeeze it is with the new motor mounts putting the engine back at factory height. =)

Most of the pulleys are from the 4.2, put onto my 4.0 accessories, since they are mostly new. I had contacted the seller of the 4.2 and they found some of the original accessories with their pulleys intact. Even though the accessories did not match the motor as they had said they did, they worked for our purpose. Pulleys removed, pulleys used!

 

Today, the engine harness is now in place, plus the new dual radiator cooling fans. They are still working on it through the day.

 

My techs are *almost* done with the supercharger install & engine swap. They ask this question:
"Are we supposed to use the 4.0 cam position sensors in the 4.2 engine? The
4.2 sensors do not plug in to the harness. The reluctance is the same."

I have not been able to speak with them yet this morning. They are nearing completion of the 4.2 engine swap, replacing the 4.0.

Does anyone know the answer?

Update: It appears that the 4.0 units will work just fine in the 4.2, so they are moving ahead with that plan.

Thanks!

 

The 3 pics were taken about an hour ago. The techs are doing electrical work wherein they are making sure that wires and pins are in perfect condition. They're using the 4.2 ignition coils and the 4.0 cam sensors. Everything seems to be checking out. The supercharger final install should be on Monday, shooting for a start-up on Tuesday. We had to go with a longer belt due to using my 4.0's brand new air conditioning compressor. No problem. Aside from new engine mounts, they also used new transmission mounts since the original had torn.