Hi everybody,
Few weeks ago I bought this XKR on an auction. I had some misfiring issues so I decided to check the coils and plugs. I was shocked, after removing the coils the plugs were under water. On left side all of them on the right only the first. Have you ever seen something like this? What am I supposed to do?

 

What I would do:

Vacuum out any moisture with a shop vac. Then take out the spark plugs and throw them away.

Install new plugs then clear any codes and see if they re-appear.

I use NGK laser iridium IFR5N-10 plugs.

But there is an even fancier one now available, the NGK 96457 FR5BHX Ruthenium HX Plug:
SKU #FR5BHX ITEM #NGK96457

Z

 

Perhaps someone washed the engine during a detail prior to the auction.

 

^^^^^^^ likely more than once. Pressurized car wash water can find it’s way everywhere it should never be.


Z

 

Warning TSB

 

The coil covers don't seal particularly well against water ingress anyway.

The brass ferrules in plastic is one of Jaguar's (and others, to be fair) less bright ideas as they pull very easily: not helped by over-zealous bolt tightening. It looks like someone has already had problems.

Torque figure for both coil and coil cover bolts is 4Nm, which isn't much more than finger tight.

 

Thank's everyone. It seems to be a different problem. The expansion tank is leaking and the coolant was splashing all over the engine.
Do you think the coils survived the bath or should I change them.

 

Is there a way to fix the ferrules? Half of them are loose.

 

I would clean them up as best you can then just see how they go. Make sure they're totally dried out before you refit them.


The ferrules can be glued back in place. I had a couple come out with the bolt when I lifted a cam cover.

Smear some hi-temp JB-Weld (I think I sourced it from Amazon) or similar around the ferrule and the inside of the locating hole. Not too much else you won't get the ferrule fully back in place. It needs to fit flush.

Use some anti-seize on the bolts when you put things back together, and go gently...

 

THAT^^^^^
Clean everything up, restart and see what you got. Don't worry. Worrying doesn't help! If all you have is misfires with little lakes in the plug holes, sounds like things ain't that bad.

I would love to see what ya got at auction!
Got any pics of the car?

 

Thanks for the advice. I decided to change both the coils and plugs. They seemed original and she has quite some milage. The coils should be delivered in 3 days, I will give then some feedback with pictures too.