[Healeys] BN2 Incontinence

[Michael Salter]

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.

On Tue., May 13, 2025, 10:32 p.m. Bob Spidell, <bspidell at comcast.net> wrote:

> 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.
>
> 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.
>
> bs
>
> On 5/13/2025 7:22 PM, Michael Salter wrote:
>
> 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!!
>
> M
>
> On Tue., May 13, 2025, 9:46 p.m. Bob Spidell via Healeys, <
> healeys at autox.team.net> wrote:
>
>> Listers,
>>
>> Just noticed, after a short local drive my BN2 was peeing oil out the
>> driver (L/H) side of the engine. I won't get to a diagnosis and fix for
>> a couple weeks; just wondering if anybody has a guess. My first thought
>> was the OP gauge fitting came loose or the line broke, but the gauge was
>> indicating fine as was the temp gauge.
>>
>> Any guesses?
>>
>> Bob
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