[Healeys] Sprite question for my neighbor

[Harold Manifold]

Hi Steve,

The issue you described with your neighbor's 1275 engine may be related to
a similar problem I've encountered.

I know of a recently rebuilt engine that experienced comparable excessive
oil blow-by. The cause, in that case, was a poorly refurbished and refitted
rocker shaft and bushings. Without adequate restriction between the rocker
shaft and the bushings to regulate the oil flow, it resulted in an
excessive amount of oil being pumped to the top of the engine.

I hope this provides another avenue for investigation.

Regards,
Harold

On Sat, Nov 15, 2025 at 1:12 PM Michael Salter <michael.salter at gmail.com>
wrote:

> Hi Steve, what you describe sounds to me like excessive blow-by.
> I would recommend a compression test before going too much further.
>
> M
>
>
> ------------------------------
> *From:* Healeys <healeys-bounces at autox.team.net> on behalf of Steven
> Kingsbury via Healeys <healeys at autox.team.net>
> *Sent:* Saturday, November 15, 2025 3:33:19 PM
> *To:* Healey Mail List <healeys at autox.team.net>
> *Subject:* [Healeys] Sprite question for my neighbor
>
> My neighbor bought a bugeye that had a 1275 engine put in it. It runs
> well, but blows oil like crazy out of the oil cap on the valve cover. It
> does not have a timing cover ventilation valve, but a fitting was made to
> fit onto where the old fuel pump fit on the side of the crankcase/block.
> When he hooked the hose from that fitting to the carbs, oil was no longer
> being blown out, but oil was then being sucked into the carbs and he was
> burning oil like crazy.
>
> It seems the pressure in the crankcase is so great it is pushing oil up
> the push rods into the rocker assembly, out the filler cap and all over the
> engine. I'm not familiar with the 1275 and have no ideas on how to vent the
> pressure in the crankcase. Can anyone of you guys point me to a possible
> solution? Thanks in advance for the advice.
> Steven Kingsbury
> BN1
> _______________________________________________
> Support Team.Net http://www.team.net/donate.html
> Suggested annual donation  $12.75
>
> Archive: http://www.team.net/pipermail/healeys
> http://autox.team.net/archive/healeys
>
> Healeys at autox.team.net
> http://autox.team.net/mailman/listinfo/healeys
>
> Unsubscribe/Manage:
> http://autox.team.net/mailman/options/healeys/manifold@telus.net
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://autox.team.net/pipermail/healeys/attachments/20251116/3ea4d982/attachment.htm>