[Healeys] HD8 Su's

[i erbs]

Seems oil could leave arournd threads of dashpots or out vent holes in
dashpots

Ira Erbs
1959 AH 100-6
1967 MGB
Milwaukie, OR

On Fri, Jun 18, 2021, 6:46 AM healeyguy--- via Healeys <
healeys at autox.team.net> wrote:

> Bob etal
> Contemplating the damper oil loss.  What is the path of the engine vacuum
> that allows/causes the oil to disappear.
> If the engine is not running there is no vacuum, therefore no way for oil
> loss in an SU carb.
> Engine running, engine vacuum could potentially pull at carb parts
> interface that control the oil reservoir at two locations,
> That being the fit of the damper plunger tip to the tube in the piston or
> the fit of the outside of the piston tube to the chamber.
> Suspect that oil loss is a result of a poor fit at these locations.
> P
>
> -----Original Message-----
> From: Bob Spidell <bspidell at comcast.net>
> To: Michael Salter <michaelsalter at gmail.com>
> Cc: healeys at autox.team.net <healeys at autox.team.net>
> Sent: Thu, Jun 17, 2021 11:16 pm
> Subject: Re: [Healeys] HD8 Su's
>
> Yeah ... I overfill a little and let them find their level.
>
> On 6/17/2021 9:34 AM, Michael Salter wrote:
>
> Actually Bob even that is too much ... resistance just before the cap
> reaches the threads is sufficient.  At that level I find that the oil never
> goes away.
>
>
>
> On Thu., Jun. 17, 2021, 10:34 a.m. Bob Spidell, <bspidell at comcast.net>
> wrote:
>
> My observation as well. I fill them until you feel resistance when the cap
> is about a half inch from the top of the carb.
>
>
> On 6/16/2021 10:47 PM, Alan Seigrist via Healeys wrote:
>
> Roger -
>
> you don't need that much oil in the HD8 pistons for this to work
> correctly.  HD8s throw all excess oil out the vent... so if you are
> overfilling it will all go out anyway.
>
> The main thing to check is to take the dampers out and slide them back in
> with the shaft straight up, and if you feel resistance toward the
> bottom.... you don't need to refill.  I suspect you are overthinking it.  I
> used to think HD8s use too much oil until I realised they don't need all
> that much to work correctly.
>
> Cheers,
>
> Alan
>
> On Thu, Jun 17, 2021 at 12:59 AM Roger Grace via Healeys <
> healeys at autox.team.net> wrote:
>
> Ok have spoken to Joe who was most helpful.
> We did some measurements together over the phone and established that my
> dampers are correct.
> He says that he has encountered this before but not sure of the reason.
> Suggests that I run the dashpots dry then start again.
> In meantime he will do more research.
> rg
>
>
>
>
>
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