<p dir="ltr">No, on the BN2 the tach drive is a skew gearbox taken from the top of the oil pump shaft. Very conveniently pasitioned under the exhaust manifold. Bit of a pain to remove because a couple of the tappet cover screws are in the way. The tach drive is on the distributor of the 6 cylinder engines, much more conveniently located. </p>
<br><div class="gmail_quote gmail_quote_container"><div dir="ltr" class="gmail_attr">On Tue., May 13, 2025, 10:32 p.m. Bob Spidell, <<a href="mailto:bspidell@comcast.net">bspidell@comcast.net</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><u></u>
<div>
Ah, yeah, now I remember having to route the OP line across the
scuttle. But, the tach drive is off the distributor, on the R/H
side, no? I replaced the seal when we rebuilt the engine.<br>
<br>
Tappet cover, IIRC, is on the L/H side; that was my first guess
since the oil isn't contaminated (until it hits the pavement). I
didn't learn until after the rebuild that one of the tappet cover
screws has to be shorter, lest one of the tappets hit it; always
wondered if I did that right or not. <br>
<br>
bs<br>
<br>
<div>On 5/13/2025 7:22 PM, Michael Salter
wrote:<br>
</div>
<blockquote type="cite">
<div dir="auto">The oil pressure take off is on the right side of
the engine Bob. My guess would be the tachometer drive, the seal
on the shaft hardens and cracks ( probably only about 70 years
old, they don't make them to last) or the tappet cover. I have
found that the tappet cover screws need to be gently retightened
af a few hours of operation. On the 100S they were all lock
wired which tells you something!!
<div dir="auto"><br>
</div>
<div dir="auto">M</div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Tue., May 13, 2025, 9:46
p.m. Bob Spidell via Healeys, <<a href="mailto:healeys@autox.team.net" target="_blank" rel="noreferrer">healeys@autox.team.net</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Listers,<br>
<br>
Just noticed, after a short local drive my BN2 was peeing oil
out the <br>
driver (L/H) side of the engine. I won't get to a diagnosis
and fix for <br>
a couple weeks; just wondering if anybody has a guess. My
first thought <br>
was the OP gauge fitting came loose or the line broke, but the
gauge was <br>
indicating fine as was the temp gauge.<br>
<br>
Any guesses?<br>
<br>
Bob<br>
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