One of my friends just had his truck diagnosed at the dealer as a slipped liner.

He did the heads and cleaned the valve train.

Noise gone. No evidence of the slipped liner either.

They say if it doesn't go away when RPMs increased it's not a slipped liner.
......

The slipped liner is the first thing people jump too.

The valve train has design flaws which make a ton of noise....

I wouldn't get rid of my engine if I was told I had a slipped liner unless I watch it move myself.

I had a similar amount of noise before a valve spring broke.

I replaced complete top end, and when I did there was no evidence of slipped liner.

Only noise now is injectors clicking (normal)

Yes and see my post

Everyone that cries slipped liner really, really, really need to read this page: JE Robison Service - Bosch Car Service Specialists ? the blog: The last word on Land Rover liner failures - I hope!

Thanks for the link.
......

I'm not buying it. Piston Skirt noise would be present at all RPM ranges.

I'm also confused to as why he is discussing the flanged liners if the liners are not the issue. if you have a cracked block the coolant will find its way up through any liner style.

I got the heads off of mine yesterday, and just need to hook up the cherry picker to remove top 4 trans bolts, and I can pull the block.
All 8 cylinders look good. No steam cleaning anywhere, all looks good with minamal wear.
Land Rover brand head gaskets were on it(not sure if stock or had ever been done) and I had no heating issues, no Co2 in coolant, oil in coolant, or coolant in oil.
Engine ran great, other than loud tapping as it warmed up.
I replaced lifters, pushrods, rocker shafts, timing chain, and all looked good. Replaced oil pump, which was cracked in 3 places...and it still ticked!
So, I took it back apart, which is where I'm at now.
I've yet to check cam, crank or rod bearings, but can't belive they would make the tap or ticking sound, I would expect a noticeably different sound, a knock.
The top of the block looks good, and there is no ring/impression in the bottom of the head gasket, at any cyclinder, that would indicate the sleeve/liner is hitting the bottom of the head gasket.
I have read good info and arguments stating that liners do or don't slip. So far, these liners appear to be ok.
I still think I'm going to pin all 8. I'm about to have the engine out, so it would be one potential problem eliminated.
I will measure the piston skirts(as well as everything else), since the skirts were specifically mentioned in the above article. But again, I would expect a different sound from pistons, more of a knock or hollow sound, not a gremlin with a ball peen hammer.
Hopefully I can find a definative answer once I have everything apart and measured.
I'll post what I find.
I have to find something.