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If you need the hole, I'd pull the pan. As someone already said -
what would you say about a shop that left shavings in your new
engine?<br>
<br>
Don't know the flow rate of oil from the turbo, but how close is
AN10 to 3/8 NPT. A quick search shows Summit has a connector for
the two:<br>
<a class="moz-txt-link-freetext" href="https://www.summitracing.com/parts/vpe-26006">https://www.summitracing.com/parts/vpe-26006</a><br>
<br>
I'd try and go simple since this look a similar size in the picture
at the link above.<br>
<br>
Brian<br>
<br>
<div class="moz-cite-prefix">On 10/3/2020 8:56 AM, Miq Millman
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CALUbS3Gj1RSWwLj6TSeSY8pCfAZUa8Z3znhBZChuV-+H0qHEUA@mail.gmail.com">
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<div>Here's what I want to do:</div>
<div><br>
</div>
<div>Drill a 23/32' hole in the side of the oil pan for the (1/2
NPT-AN10 steel braided line that allows the oil from the turbo
back into the block. I have the NPT tap ready.</div>
<div><br>
</div>
<div>Here are the complications:</div>
<div><br>
</div>
<div>1) pan is bolted and sealed to the block -- I would rather
not remove it</div>
<div>2) oil pan is aluminum not steel</div>
<div>3) there is already a threaded hole for 3/8 NPT</div>
<div>4) engine is newly built long block, with most of the
ancillaries still to be attached, on an engine stand.</div>
<div>5) there is an additional hole on the opposite side of the
pan for an oil temp sensor</div>
<div><br>
</div>
<div>Here is what I am thinking:</div>
<div><br>
</div>
<div>1) coat the drill bit in some red grease to collect
aluminum shavings</div>
<div>2) seal off water and vacuum passages with tape</div>
<div>3) set air compressor to something very low, like 20 psi,
and thread into the oil sensor hole (1/8 NPT)</div>
<div>4) fabricobble up a reduced hose to the shop vac line and
point that at the drilling point</div>
<div>5) drill in short bursts, possibly cleaning the bit and
grease each time, and reapplying grease</div>
<div>6) after I tap the hole (also a challenge due to the length
of the tap and the baffle inside the pan) dump 5-6 quarts of
the cheapest 10 w oil at the FLAPS and kind of "slosh" it
around by slightly rotating the engine on the stand, drain and
repeat again</div>
<div>7) check second pot of drained oil for metal shavings, if
found try gas or diesel followed by 3rd round of cheap oil
flush</div>
<div><br>
</div>
<div>Open to options and opinions. Including telling me not to
be an idiot with my $8000 engine and just pull the pan.</div>
<div><br>
</div>
<div>
<div dir="ltr" class="gmail_signature"
data-smartmail="gmail_signature">--<br>
__<br>
Miq Millman <a href="mailto:miq@bigllama.com"
target="_blank" moz-do-not-send="true">miq@bigllama.com</a><br>
Tualatin, OR Big Llama Productions<br>
</div>
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<br>
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