D2 V8 BLOCK ISSUE

**SHREEVE** · 30th December 2011, 04:46 PM

Hi There Ladies & Gents,

Im currently in the market for a new 4x4 and while I was shopping around for a jeep wj I came across a disco 2 and as soon as I sat in it I thought this is what I want. I know they are in need of constant maintenance which dosent bother me as I always keep my cars mechanicly A1 and do 99% of the work myself and Im an old hand with a wrench and or multimeter so trouble shooting wont be an issue, though my main concern is the porus engine blocks in the v8 and was wondering if this flaw is within every disco 8 engine block or there is only a small percentage that have this issue?

all help would be greatly appreciated.

James.

p.s Ive searched for three days in the good oil section but havent come across an answer to my q.

**PhilipA** · 30th December 2011, 04:52 PM

In the Book "How to Power tune Rover V8 Engines" by Des Hammill, he estimates that 80% of 4.0 litre blocks suffer cracks and 15% of 4.6 blocks. ref Page 29.

It may not be as high as this but yes LOTS of them fail.
Regards Philip A

**SHREEVE** · 30th December 2011, 06:00 PM

Hi Phil, Thanks for the info I might go with the TD5.. cheers

**p38arover** · 30th December 2011, 06:46 PM

Originally Posted by SHREEVE

p.s Ive searched for three days in the good oil section but havent come across an answer to my q.

The Good Oil section doesn't cover that sort of info. Search the whole site. You won't find references to porous blocks that's not what happens to them. They crack or have slipped liners.

Search on slipped liner.

**ozscott** · 31st December 2011, 08:14 AM

There are many that do high miles and no problems. If they do fail then use the heads grab a 4.6 new cast and live life. Cheers

**timdo1** · 3rd February 2012, 03:56 AM

Where do i grab a 4.6 new cast from.

Ive rebuilt mine 3 times in the last 2 years. Makes me want to get rid of it. And before that i was very happy.

**p38arover** · 3rd February 2012, 07:53 AM

Originally Posted by timdo1

Where do i grab a 4.6 new cast from.

Ive rebuilt mine 3 times in the last 2 years. Makes me want to get rid of it. And before that i was very happy.

Did you have a slipped liner?

If so, have you fitted top hat liners in any of those rebuilds?

**Psimpson7** · 3rd February 2012, 08:35 AM

Originally Posted by PhilipA

In the Book "How to Power tune Rover V8 Engines" by Des Hammill, he estimates that 80% of 4.0 litre blocks suffer cracks and 15% of 4.6 blocks. ref Page 29.

Are they the correct way round Phillip?

Rgds
Pete

**p38arover** · 3rd February 2012, 08:42 AM

Originally Posted by Psimpson7

Are they the correct way round Phillip?

Rgds
Pete

That's the way it is in the book.

**Psimpson7** · 3rd February 2012, 09:03 AM

That doesn't make a lot of sense to me! Aren't the blocks identical, the only difference with the 4.6 is the crank and rods?

Why would one be that much worse than the other... amount of heat they produce?

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