Replace the cylinder head and check the block for evidence of warping.

The mark on the piston crown should not be an issue.

 

So you're saying the head can't be fixed? eBay doesn't seem to have any used heads that I can find period any recommendations of where I can find one?

 

You can have a local machine shop examine the head and determine if the tappet bore can be repaired. Have you removed the rest of the valves and examined the seats and guides?

Bear in mind if the valve guides are worn, there are no internal service parts available for the AJ133 from JLR.

 

I have not taken any of the other ones apart yet. I think my next step is to get it to a machine shop and have them examine it.

 

Why do people think the head will be warped? It didn't overheat. I don't get it. Anyway, that head is repairable, probably just with a Dremel, the piston is fine and you need new later style chain guides with the steel insert. Should be a cheap fix if the head is OK on the combustion chamber side, you don't show that in the photos.. I don't think you can use new buckets with an old cam, maybe you can get a used one, I have a few.

Mine was a little worse.......

 

Thanks for the info. My only real concern is that at the bottom where the spring sits there is now a hole. Here is a close up. Also here is a picture of the other side of the head. Nothing wrong with it that I can see.

 

It is always a good practice to inspect a cylinder head, especially one made of aluminium, for warping whilst removed from the block.

 

How many miles?

 

About 135k

 

Just taking a WAG, but that void in the spring seat may have made the spring unstable. It would be interesting to see what the valve stem shear marks looked like.

 

Great pictures!
Really can see what's going on now.
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Have you guys ever seen a failure like this on the forum before?

 

Not that I can remember and I have been here over 10 years.
I have never seen that type of void and spring failure on anything ever.

So I think it was a manufacturing defect and is very rare.
Or I sure hope it is!!

I do find several heads on EBay?
Here is a drivers side one for around $700?
5.0L Cylinder Head
Says only 31K on engine and has the 8mm chains.

Here is another one?
5.0L Drivers Side Head

So I think you can find one without too much trouble?
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[QUOTE=clubairth1;2306826]Not that I can remember and I have been here over 10 years.
I have never seen that type of void and spring failure on anything ever.

So I think it was a manufacturing defect and is very rare.
Or I sure hope it is!!

It looks like the spring punched a hole through the valve spring seat.

I've seen a spring fail and the valve stem be intact.

I've seen a valve fail, head popped off, and spring was intact.

I've seen a valve fail at the "keepers" and the spring was intact.

But I've never seen a valve fail, apparently at the "keepers", and the spring disintegrate.
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Correct me please if I'm wrong but it has to be ahead from a supercharged 5.0 correct? I can see the cam is different for sure. From my searches they specify with and without.

 

Here are the pieces I found except for this spring retainer. I tossed it but it was mostly intact and just fell out when I removed the head cover.

 

clubairth those heads are for non supercharged. Look at the cams one shaft has dual profile lobes.

 

That's what I thought. If anyone sees a good deal on a used supercharged driver side head let me know. I still am going to bring it to a machine shop and see how much it will cost to repair.

 

Best of luck to you getting things sorted out.

 

Good practice to inspect all parts but they don't warp on their own.