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While on this general subject... the 250 and TR6 blocks have a ledge
machined into the top couple mm of each bore, presumably to allow a bit
of the head gasket to seep into this space. Does anyone have a better
explanation?
Has anyone had this ledge removed by decking the block and if so were
there piston to head clearance issues?
DaveP
On 12/12/2018 10:38 AM, TERRY SMITH wrote:
>
> I'm probably in the minority here, but I measure the effort/expense of
> doing it 100% right, against the effort/expense of fixing it if it
> doesn't work. If the block is already out, seems little effort and
> minimal money to have it skimmed at a machine shop, with the added
> advantage that they'll boil the block, thus cleaning any years' worth
> of crud out of the water channels, and check the block for cracks. Am
> I glad I did that? Yes. When I took in the block that was original
> to the car for checking, the machinist found cracks where the liners
> sit. I'd have had to pull the engine and start over, assuming I
> hadn't ruined it altogether already. Instead, I sourced a free block
> from a List member in CT, and was golden.
>
>
> Your experience may vary and all that.
>
>
> Terry Smith, '59 Tr3AÂ TS 58667
>
> New Hampshire
>
>
>> On Mon, Dec 10, 2018, 12:58 PM Sujit Roy < triumphstag@gmail.com
>>
>> I've been at the block face of a Stag's engine with a Roloc. (The
>> block has been sitting in my garage for may years.)
>> I have noticed around the water channels some imperfections on
>> the surface. The rest of the block face is relatively OK.
>>
>> Can I get away with not having the block face decked?
>>
>> Sujit
>> --
>> Sujit Roy
>> Cupertino, California
>>
>> https://triumphstagblog.wordpress.com/
>>
>>
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>
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<p>While on this general subject... the 250 and TR6 blocks have a
ledge machined into the top couple mm of each bore, presumably to
allow a bit of the head gasket to seep into this space. Does
anyone have a better explanation?</p>
<p>Has anyone had this ledge removed by decking the block and if so
were there piston to head clearance issues?</p>
<p>DaveP<br>
</p>
<div class="moz-cite-prefix">On 12/12/2018 10:38 AM, TERRY SMITH
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:2052966149.18781.1544636315957@connect.xfinity.com">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<meta charset="UTF-8">
<p style="font-size: 12pt; font-family: helvetica, arial,
sans-serif; color: rgb(51, 51, 51);">I'm probably in the
minority here, but I measure the effort/expense of doing it 100%
right, against the effort/expense of fixing it if it doesn't
work. If the block is already out, seems little effort and
minimal money to have it skimmed at a machine shop, with the
added advantage that they'll boil the block, thus cleaning any
years' worth of crud out of the water channels, and check the
block for cracks. Am I glad I did that? Yes. When I took in
the block that was original to the car for checking, the
machinist found cracks where the liners sit. I'd have had to
pull the engine and start over, assuming I hadn't ruined it
altogether already. Instead, I sourced a free block from a List
member in CT, and was golden.<br>
</p>
<p style="font-size: 12pt; font-family: helvetica, arial,
sans-serif; color: rgb(51, 51, 51);"><br>
</p>
<p style="font-size: 12pt; font-family: helvetica, arial,
sans-serif; color: rgb(51, 51, 51);">Your experience may vary
and all that.<br>
</p>
<p style="font-size: 12pt; font-family: helvetica, arial,
sans-serif; color: rgb(51, 51, 51);"><br>
</p>
<p style="font-size: 12pt; font-family: helvetica, arial,
sans-serif; color: rgb(51, 51, 51);">Terry Smith, '59 Tr3AÂ TS
58667<br>
</p>
<p style="font-size: 12pt; font-family: helvetica, arial,
sans-serif; color: rgb(51, 51, 51);">New Hampshire<br>
</p>
<p style="font-size: 12pt; font-family: helvetica, arial,
sans-serif; color: rgb(51, 51, 51);"><br>
</p>
<blockquote type="cite">
<div>
<div dir="ltr">
<div class="ox-b488e11791-gmail_quote">
<div dir="ltr">On Mon, Dec 10, 2018, 12:58 PM Sujit Roy
< <a href="mailto:triumphstag@gmail.com";
moz-do-not-send="true">triumphstag@gmail.com</a>
wrote: <br>
</div>
<blockquote>
<div dir="ltr">
<div>
<div>I've been at the block face of a Stag's engine
with a Roloc. (The block has been sitting in my
garage for may years.)</div>
<div>I have noticed around the water channels some
imperfections on the surface. The rest of the
block face is relatively OK.</div>
<div><br>
</div>
<div>Can I get away with not having the block face
decked?</div>
<div><br>
</div>
<div>Sujit</div>
-- <br>
<div dir="ltr"
class="ox-b488e11791-m_-2928778390541956300gmail_signature">
<div dir="ltr">
<div>Sujit Roy <br>
Cupertino, California</div>
<div><br>
<a
href="https://triumphstagblog.wordpress.com/";
target="_blank" rel="noopener"
moz-do-not-send="true">https://triumphstagblog.wordpress.com/</a>
<br>
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<pre class="moz-signature" cols="72">--
Porter Custom Bicycles 2909 Arno St. NE Albuquerque, NM. 505-352-1378 My World
go here: <a class="moz-txt-link-abbreviated"
href="http://WWW.PORTERBIKES.COM/";>WWW.PORTERBIKES.COM/</a></pre>
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