Re: [HSS] CORROSION IN S-V HEADS & BLOCKS

Unknown

Hi Peter,



Well, having worked with gas and diesel engines

for years I never heard that one



The only problem I've heard about with Hudson

engines was the aluminum head (which anybody that

used them had). That is a case of disimilar

metals which could cause the head to literally

weld itself to the block.



Almost seems to me the fellow is trying to sell

an expensive sleeve job - and I've never heard of

a Hudson engine yet that needed sleeving.



But then what do I know.



Alex Burr





--- Peter Ransom <peter.ransom@iint.com> wrote:

> All,

>

> The guys who will be doing the engine for my

> racer tell me that the

> nature of the alloy used in the side-valve

> engines (Block and head)

> makes it prone to corrosion. Seems it was a

> steel/cast iron

> combination and the steel component rusts. The

> consequence of this,

> they say, is that (a) sleeving the block would

> be a very good idea

> and (b) casting up a new head would make sense

> because local

> (Australian) experience is that when you

> increase the compression

> ratio the combustion chamber will fail due to

> the rusting from within

> the waterways.

>

> I have no problem with sleeving, but the

> prospect of creating a new

> head sounds expensive!

>

> As my direct experience with these engines is

> zero, I have several

> questions for our group:

>

> ** Is the above story regarding the metallurgy

> correct?

> ** Are other people with s-v engines facing or

> experiencing this

> problem?

> ** If we in Australia were to produce a new

> head (probably in

> aluminium and with Ricardo-style combustion

> chambers) would others be

> interested in taking up some of the production?

> Price (completely

> unknown at present) would obviously be a

> factor, but our exchange

> rate is so bad right now - US$1 buys AUD$1.87 -

> that it could be a

> bargain!

>

> Maybe this has all been done before. I'd

> appreciate hearing from the

> group.

>

> Thanks.............Peter R.

>

>

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