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Disco with "New" motor

 
 
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imatthew
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PostPosted: Sun Sep 06, 2009 10:56 am    Post subject: Disco with "New" motor Reply with quote

I recently purchased a 1998 Discovery for my wife. The main reason for selecting this particular car was that it had a "New" motor. I queried what was meant by "New" and I was told it was fully rebuilt by a well known Land Rover parts place here.

I could tell that it had all new gaskets and cold see that it had recently put together, so I did not doubt what I was being told.

When I picked it up it had a "ticking" noise that sounded like a leaking exhaust manifold. Even though it was a little annoying, I was too busy to find the exhaust leak. A few weeks later I went looking for it and could not find a leak, so I put it down to a noisy tappet. A few weeks further on and the ticking turned into a loud knocking. Even though I was hoping that it was a really bad tappet, I was pretty sure it was a slipped liner.

So the time came to open up the motor. The photos below are what I found. The motor was filthy internally. The big end and main bearings were worn through to the copper. The water pump had been taking chunks out of the timing cover as well as itself. The cam on this model requires a retainer to stop it from walking, this motor had no retainer and the block was not even drilled for it. the cam chain had so much play in it that it was lucky that it was still on there. And of course the slipped liner.

I later checked the engine number and found that the motor was around 10 years older than the car and out of a Range Rover Classic. There is virtually nothing that is reusable in this motor.










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imatthew
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PostPosted: Sun Sep 06, 2009 11:08 am    Post subject: Reply with quote

It only allows 10 photos per post. So here is the last 2

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imatthew
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PostPosted: Sun Sep 06, 2009 11:21 am    Post subject: Reply with quote

It just so happened that I had a 4.6 block sitting around to at least go in as a temporary fix. Here of some photos of me building up the bottom end.




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imatthew
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PostPosted: Tue Sep 08, 2009 3:32 am    Post subject: Reply with quote

Just a further update. It ended up that the motor had two slipped liners and not just one. Number 5 and 8 cylinders. The second one had been gone for so long that carbon had built up on the actual block above the sleeve. The sleeve was sitting down around 3mm and the carbon must have hidden it from me.
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Nathaniel
Difflock Royalty


Joined: 13 May 2003
Odometer: 17901
Location: North, North Yorkshire


1979 Suzuki LJ

PostPosted: Tue Sep 08, 2009 8:04 pm    Post subject: Reply with quote

Thanks for sharing the pics Ian - It shows just how many things a V8 can have wrong with it and still be working....

Hope your new engine goes better.

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Nat

If You Open Your Mind Too Much Your Brain Will Fall Out
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imatthew
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PostPosted: Sat Sep 12, 2009 4:08 pm    Post subject: Reply with quote

The rebuild continues. It will be running tomorrow.

I started with a 4.6 block that had done about 50,000 miles. Just to give it a bit more life, I put in new rings and bearings. Used ARP studs instead of head bolts. Fitted a new Wade cam built for what I use the car for. New genuine Land rover Lifters. Fitted fully recoed heads with hardened seats for LPG. It now has a Crow double link timing chain. New water pump. One photo shows the spacer you have to use on the crank if you are fitting a 4.6 or 4.0 if a distributor type timing cover. And because I was bored waiting for the cam to be done, I painted the rocker covers and plenium.






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blanche_90
Mud Obsessed


Joined: 23 Nov 2004
Odometer: 2515
Location: recession land



PostPosted: Sat Sep 12, 2009 5:21 pm    Post subject: Reply with quote

i've got a black and red shirt like that! and guess what? i use it like that now!
not on a V8 though.

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politicans are like a baby's nappy, they need changing often for the same reason
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imatthew
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PostPosted: Sun Sep 13, 2009 12:23 pm    Post subject: Reply with quote

It lives again. Which is bloody miracle with me building it up from scratch.
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