Started on passenger side to replace spark plugs. Figured the one furthest forward would be the easiest. Unplugged wiring; removed screw from coil. Coil assembly slides up and down very nicely; however, the shock absorber well prevents the coil from coming out.

I have turned the coil assembly every which way imaginable, darn thing still doesn't have clearance.

Thanks for your help.

 

Is it the engine tower brace bars in the way? You might have to bend it slightly to an angle to get it out.

 

Thanks; it is just the well for the shock. Is it okay to bend the tube a bit. Didn't try that. I may take a pic tomorrow.

 

The rubber tube or boot on the lower end of the coil is flexible, so you can let it bend a little to give you the clearance you need to remove the coil. You'll find that you have to do this on some of the other coils as well, especially the one in cylinder 8 (right rear when facing the engine from the front of the car). To remove that spark plug it helps to have a couple of extensions and a universal joint. The setup in this post works for me:

https://www.jaguarforums.com/forum/x...2/#post1638351

Cheers,

Don

 

With the difficulty getting a car in for service in the Seattle area & the delays in having the service completed(not to mention the cost), etc., I could not keep this car that I like so much were it not for the help received on this site!

Hence, I am very grateful for all your help over the last 13 years!

Will be travelling for the next couple of weeks; so, will get back to this project in May. I'm sure there will be more questions.

Have a great Easter!

 

What is this? & should it be removed to get the spark plug coil assembly below it out? If it needs to be removed, is there a procedure on the site? One bolt is self explanatory, but another seems to be quite difficult to figure out how to remove.

 

Agreed. Don't be afraid to bend and twist it out.

 

OK, I can see how to bend it slightly; however, there is no way this will pass between the base of the disc-like part in the picture and the shock well.

 

That round flat part is the PCV valve (positive crankcase ventilation). It is possible to remove it, but at the risk of creating an air leak due to the old hardened seal being damaged. I have never had to remove it in order to remove the coil, so try bending the head of the coil another direction and twisting it until the angled mounting tang helps you clear the PCV and other obstructions.

Cheers,

Don

 

Thanks, Don; I'll give it a try; however, it seems like too much force required. I will reconcile to the fact that I'm likely to break the plastic top of the coil.

 

I always just unbolt and move that guy aside. Never had any issues by doing that.

Edit...From the picture, it looks like it might be a bit different on your supercharged engine.

 

You'll just need to bend it slightly and may have to rotate the top of the coil one way or the other to remove it

 

Okay, back in town & thanks to the excellent help from you fellows, have replaced all except rear two on right side when facing the engine. The swivel & extensions recommended are the ticket!

I loosened the clip holding the fuel & vacuum lines; however, the grey one doesn't seem to move much.

The next to the last one on the right side(7?) seems to be blocked by the grey line (fuel line?). I can move the line, but not enough to get the coil out. Not knowing how much force I can apply before damaging the hose, I'm reluctant to apply too much.

Any hints on getting #7?

# 8, while I haven't done it yet, doesn't look to be as difficult.

 

You have to remove the inboard panel that houses the master cylinder. See this link:
https://www.jaguarforums.com/forum/x...2/#post1257206

 

Thanks, Zazzy; but I din't see a reference to the inboard panel that houses the master cylinder? I did release the clip as shown.

 

Hi Steve,

Zazzy's tip will certainly help, but I've replaced the plugs on several supercharged and normally aspirated X350s, including our '04 XJR, and I haven't ever had to do that. I've always been able to just wiggle and rotate and contort the coil and eventually get it out with minimal movement of those lines. I'm sure I've had to bend the rubber boot on the coil somewhat while extracting it and again while reinstalling it.

Zazzy, what year and model is your car? Just curious to know it may be different in some way from the cars I've worked on.

That next-to-last cylinder on your right when facing the engine is number 6. All the odd-numbered cylinders are in the bank on your left when facing the engine (cylinder 1 is at the front), and all the even-numbered cylinders are in the bank on your right.

Cheers,

Don

 

LOL. I looked and yes. I had to take that stupid panel off. Good luck!

 

Thanks, guys. So, i don't have to remove anything? As I said, I have released the clip. The vacuum hose came unplugged easily. The grey hose is the one that is confounding me.

 

It's a 2004 XJR. I've seen photos of other XJRs and mine is different. Don't know why. I tried every way possible to remove the COP without having to remove that clip and move the lines (short of breaking the COP in two).

 

What's the COP? The grey line?