[ROVERNET - UK] V8 Engine rebuild query - belated thanks

Slatskars slatskars at comcast.net
Wed Oct 4 19:38:01 BST 2006

I though that I would pipe in on a portion of this subject. That is pinholes 
in the sleeve or block. Way back I recall having this problem arise on a CAT 
3208 block. My lead mechanic said that this was not too uncommon on large 
diesel engines from aeration in the cooling system. It seems that the little 
air bubbles can eventually wear a hole through. He also showed me some wet 
sleeves from a Cummins that had not gone through, but there were definite 
signs of the potential. An additive and some modifications to the radiator 
were made to minimize this problem.

----- Original Message ----- 
From: "Kent Kinard" <kkinard at wcc.net>
To: <rovernet at lyris.ccdata.com>
Sent: Wednesday, October 04, 2006 8:20 AM
Subject: Re: [ROVERNET - UK] V8 Engine rebuild query - belated thanks

> On Wed, 4 Oct 2006 20:43:27 +0800
>  "Peter_Mitchell" <bpf7akh02 at sneakemail.com> wrote:
>  I don't
>> think that the TRS prices are too bad and a new 3.9 short motor would be 
>> an
>> excellent headstart to a reliable unit.
> I don't think so.  Your 3.5 bored to take thin sleeves with a 3.7" bore 
> will give you 3.9 litres and will have more meat in the cylinder walls 
> than a new 3.9.  To my way of thinking the new 3.9 is the worst of all 
> possible combinations with the 4.0 being a close second.  I wish I had a 
> manufacturer and part number for the thin sleeves.
> It's possible that TRS makes their own 3.9 from late crossbolt style 3.5 
> replacement blocks.  Some engine builders in the UK do this.  Ask them 
> exactly what their 3.9 consists of and how much they do themselves.
> Maybe I'm being overly cautious.  There are not that many folks on this 
> list who run a 3.9 in anything.  The price of fuel makes the daily use of 
> a 3.9 less attractive than a 3.5 and when you throw in the risk of a 
> sleeve coming loose or cracking and the extra money it will cost initially 
> and the extra strain on driveline components and the fact that no one will 
> know the difference when you raise the bonnet...
> How fast do you really want to go?  For just a little more money you could 
> do a 4.6 with a little less risk of sleeve problems and a much better 
> bottom end.
> I'm getting old and conservative...bad sign.
> Roverelderly,
> Kent K.
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