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I just had to put a new head on one of my tractors. With the new
head I had a small coolant leak at the back; my mechanic would have
checked the new head for flatness, but it leaked with the old head
so I assume the block isn't flat (of course I used a new gasket and
the sealant Norman Nock recommended for 100 heads). Anyway, I had
the 'opportunity' to try several of the sealants, the one the
finally worked--for the time being--was this one (Blue Devil didn't
work):<br>
<br>
<a class="moz-txt-link-freetext" href="https://www.amazon.com/K-Seal-ST3501-Permanent-Gasket-Repair/dp/B00QYZIVA6/">https://www.amazon.com/K-Seal-ST3501-Permanent-Gasket-Repair/dp/B00QYZIVA6/</a><br>
<br>
<br>
<br>
<div class="moz-cite-prefix">On 1/7/2025 10:35 PM, Alan Seigrist
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CAFBXTkLPh2NHVWpDky6uJWn9mz_J-Ea79g4Xnp47jkD-+uZL-w@mail.gmail.com">
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<div dir="ltr">Hi Roger -
<div><br>
</div>
<div>I almost hate to suggest this, but have you tried stop
leak / aluma seal? It works very well, just the trick is to
make sure you flush the cooling system out and replace with
fresh coolant after the leaking has stopped (to prevent the
leftover stop leak from plugging other stuff up over time.<br>
<br>
Best,</div>
<div><br>
</div>
<div>Alan</div>
</div>
<br>
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<div dir="ltr" class="gmail_attr">On Wed, Jan 8, 2025 at 1:14 PM
Roger Grace <<a href="mailto:roggrace@telus.net"
moz-do-not-send="true" class="moz-txt-link-freetext">roggrace@telus.net</a>>
wrote:<br>
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<div dir="ltr">
<div>Looking for some pearls of wisdom from the more
experienced among us. Very frustrating as the car runs so
well with good oil pressure and compression.<br>
</div>
<div>After many months of tests and checking have
established that the block on my BJ8 has the porosity
issue. This is not the well known oil into water but water
into oil. (after 1000 mi, 3300ppm into oil) I did find an
area behind the center tappet cover where water was oozing
into the drain back from the rocker. Did my best to repair
it with epoxy from the outside. No doubt it is leaking
there or some place else. Fellow lister Wayne Schultz had
the identical problem.<br>
</div>
<div>My query is if there is a known solution to this
problem ? resin impregnation ? or maybe a modern treatment
?<br>
</div>
<div>Also have located some replacement blocks but how to
test ? and be assured that these old blocks also don't
develop the same problem ?</div>
<div>Changing blocks invariably means a complete engine
rebuild.<br>
</div>
<div>How common is this ? <br>
</div>
<div>All very painful.</div>
<div>rg<br>
</div>
</div>
<br>
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