Robert Thornton R.Thornton at adelaidecitycouncil.com
Tue Oct 24 03:11:16 BST 2006

Hello Miles

No, the 4.6 drops straight in. Use an angle grinder to cut off the lug
on the flywheel end of the crank (these were only needed for the Range
Rover flywheel)and if you're using the SD1 front cover/oil pump get the
ready made spacer tube to take up the extra length of the crank (Vitesse
Developments in Melbourne sell them if you're in Oz, D&D Fabrications in
the US).

If you intend using SD1 heads then you should fit tin head gaskets not
composite as the 4.6 pistons are meant to be used with the small
combustion chamber Range Rover heads. This will maintain a decent
compression, assuming you're using a high compression (9.3:1) 4.6 block,
not the low comp (8.3) one which is more generally sold in Oz. If it is
the lower cr one you will need to mill the faces of the heads, or weld
up the combustion chambers, or simply use 4.6 heads.

One more thing, if it's not a new factory 4.6 block get it pressure
tested to ensure there are no behind the liner cracks (sometimes happens
to P38 Range Rover engines). If there are then the only permanent fix is
to fit top hat liners to the bores.

Hope this helps.


-----Original Message-----
From: rovernet-bounces at lyris.ccdata.com
[mailto:rovernet-bounces at lyris.ccdata.com] On Behalf Of Winchester,
Sent: Tuesday, 24 October 2006 10:27 AM
To: 'rovernet at lyris.ccdata.com'
Subject: RE: [ROVERNET - UK] 4.6 SD1

Hi Rob,

Do you have to make many modifications to fit the 4.6 engine to your

1986 VDP

-----Original Message-----
From: rovernet-bounces at lyris.ccdata.com
[mailto:rovernet-bounces at lyris.ccdata.com]
Sent: Tuesday, 24 October 2006 10:26
To: rovernet at lyris.ccdata.com
Subject: RE: [ROVERNET - UK] Shell V Power

Hi Ray

I run straight pump unleaded in my 3.9 Land Rover Disco (8.3:1cr) and BP
Ultimate plus a dose of Flashlube in my 4.6 SD1 (9.3:1 cr).

I was put off using Optimax after reading on the US Land Rover forums
some users had experienced  upper cylinder problems with its long term
in the Rover V8 engine which seemed to be well documented.


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