Vehicle & Technical > Range Rover

4.6 SE - porous liners?

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thepsychoman:
Hi all,

Got a friend who has bought a non-runner 4.6 SE. Looks as though the car had a new engine at around 50,000 miles under LR warrantee and has just failed again (22,000 miles later)!

Heads removed and it looks as though the liners have gone porous.

So - two questions...

(a) Is it worth messing about with new liners, and if so, where to get em from?

(b) Is it a better bet to try to find and fit a 4.0 instead - as I understand that these dont suffer the liner problems?

Thanks all.

thepsychoman:
No views....  :(

thermidorthelobster:
Everybody was probably thinking somebody else would have a better comment.  Failing that, I'll bite.

Porous liners?  I've heard of porous blocks, and slipping liners, but not both.  The porous blocks apparently prevailed on earlier engines but wisdom has it don't occur so much on later ones.  Slipping liners are common in 4.6s but less so in 4.0s.

Most 4.6s last until about 95,000 miles so it sounds like your friend has been unlucky.

If it were me, I'd be very tempted to go to RPi Engineering and get one of their 4.6s instead.  I've not had one but from everything I've heard RPi really know what they're doing.  I think an RPi 4.6 would be a better bet than a Land Rover 4.0, plus you don't get the performance drop.  With the right engine and a decent warranty it should last forever.

I take it the current failed engine is out of warranty?

hairyasswelder:
I think its RPI that do 'top hat' liners with the extra lip on the top to stop them slipping?
Dont know about the cost tho'

Reggieroo:
A good friend of mine who works at Guy Salmon Land Rover as a mechanic, was telling me that nearly every P38 V8 that comes in has either had a new engine or needs a new one fitted & that goes for the 4.0 V8 too.

The reason being according to inside info is that Land Rover got another company to make the engines cheaper than they did for the Classics & Disco 1s in earlier years, therefore worse quality blocks etc  :shock:

Unless you get somebody else to rebuild it like the companies mentioned, it will just do it again.

There is another company who does this called ACR, they say that they have a proven permanent solution to the common cylinder block cracking problem.

Here is there website.  www.automotivecomp.com

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