[Healeys] External differences of six cylinder engines

[Derek Job]

Joseph

When you say 'the 26D blocks are all the same, do you mean the IC block is
the same as the 26D block?

thanks Derek

On Sun, Jun 6, 2010 at 9:37 AM, <Josef.Eckert at t-systems.com> wrote:

> Derek,
> As far as can tell, the 26D blocks are all the same. The 29D block is
> different in the casting (more strengthening) and the engine number is as
> far as I recollect higher and more to the front on the block than on the
26D
> blocks. On 26D engines it was 6 inches back from the front, on 29D engines
> only 2 inches.
> A picture of ther engine number tag of a 29D block you will find in Ditlev
> Clausager`s book "Original Austin-Healey" on page 89.
>
> Josef Eckert
> Konigswinter/Germany
>
> -----Urspr|ngliche Nachricht-----
> Von: healeys-bounces at autox.team.net [mailto:healeys-bounces at autox.team.net]
> Im Auftrag von Derek Job
> Gesendet: Sonntag, 6. Juni 2010 08:13
> An: Chris Dimmock
> Cc: Forum
> Betreff: Re: [Healeys] External differences of six cylinder engines
>
> Thanks for the comments everyone. I probably should have been more
> specific.
>
> Im looking at a very early Longbridge 100-Six which would have had an IC
> engine and the integral manifold. As is common, the old head has been
> replaced with a 12 port head and HS6 carbs. (Actually the carbs should be
> HD6's but that's another issue)
>
> The current owner believes that during a very extensive restoration in 1992
> the previous owner installed a replacement engine block. There is no ID tag
> on the engine, so I'm trying to visually determine whether the current
block
> is a replacement IC, or the newer 26 D, or even possibly a 29D.
>
> Derek
> www.healeysix.net
>
> On Sun, Jun 6, 2010 at 4:17 AM, Chris Dimmock <austin.healey at gmail.com
> >wrote:
>
> > The cylinder heads are the giveaway. ;-) The log head is the early
> > 100/6 The pre BJ8 12 port head is different to the BJ8 12 port head
> > casting - different casting number, and a distinct difference around
> > the thermostat area - look at the sculpting of the head casting In 3
> > litre blocks there are 2 castings. Pre bj8 blocks have the dipstick
> > low on the block. BJ8s have a high mounted dipstick Obviously, the
> > same general guidelines applies to sedans of the same era.
> > Eg a 1966 Wolseley has the same block/ head casting as a BJ8. But many
> > sedans had the starter motor on the opposite side to a Healey. Ie
> > different rear engine plate.
> > Chris
> > www.myaustinhealey.com
> >
> > Sent from my iPhone
> >
> >
> > On 05/06/2010, at 10:44 PM, Derek Job <derek.c.job at gmail.com> wrote:
> >
> >   Hi guys
> >>
> >> Are there any external differences between the six cylinder engines
> >> that would allow you to identify one as being either
> >>
> >> an IC  (100-Six, Integral head)
> >> or 26 D (100-Six, six port inlet)
> >> or 29D (3000)
> >>
> >>
> >> thanks
> >>
> >> Derek
> >> www.healeysix.net