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imatthew Guest
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Posted: Sun Sep 06, 2009 10:56 am Post subject: Disco with "New" motor
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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 Guest
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Posted: Sun Sep 06, 2009 11:08 am Post subject:
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It only allows 10 photos per post. So here is the last 2
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imatthew Guest
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Posted: Sun Sep 06, 2009 11:21 am Post subject:
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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 Guest
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Posted: Tue Sep 08, 2009 3:32 am Post subject:
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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
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Posted: Tue Sep 08, 2009 8:04 pm Post subject:
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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.
__________________________________ Nat
If You Open Your Mind Too Much Your Brain Will Fall Out |
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imatthew Guest
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Posted: Sat Sep 12, 2009 4:08 pm Post subject:
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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
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Posted: Sat Sep 12, 2009 5:21 pm Post subject:
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i've got a black and red shirt like that! and guess what? i use it like that now!
not on a V8 though.
__________________________________ politicans are like a baby's nappy, they need changing often for the same reason |
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imatthew Guest
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Posted: Sun Sep 13, 2009 12:23 pm Post subject:
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It lives again. Which is bloody miracle with me building it up from scratch.
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