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Is the consumption of damper oil dependent on miles driven or on time
between refills (even if the car is not driven)?
My reasoning: it is hard to imagine where that oil is going but if the
carb casting has porosity or some other leak maybe that is your problem.
Perhaps it would leak out regardless of amount of driving.
-Roland
On Tue, Jun 15, 2021, 9:53 AM Roger Grace via Healeys <
healeys@autox.team.net> wrote:
> For the SU experts ..
> Have posted about this problem before - and no, it has not gone away.
> Bought new (not rebuilt) HD8 carbs from SU/Burlen about 7k miles ago.
> Problem is excessive use of damper oil.
> Have to top up about every 1.5 tanks of gas usage.
> Ultra careful about filling properly and to feel resistance about 1/2 in
> above the thread.
> Have tried all grades of oil from 20 wt to thick gear oil with no change
> apart from accel. response times. Currently using SAE 30 nd.
> SU have no real ideas either.
> They are encouraging me to purchase new dampers - pn AUC 8112HB ... pricey
> too.
> I am not convinced that will solve it but will do so.
> There is some very minor scuffing on the valves. See photo.
> The pistons drop freely and there is the classic clunk when raised 1/8 in.
> Perhaps this is normal ? maybe other owners don't check their dashpots as
> frequently ? heavier springs to limit movement ?
> any ideas as to what gives most welcome ?
> rg
>
>
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Content-Transfer-Encoding: quoted-printable
<div dir=3D"auto">Is the consumption of damper oil dependent on miles drive=
n or on time between refills (even if the car is not driven)?<div dir=3D"au=
to"><br></div><div dir=3D"auto">My reasoning:=C2=A0 it is hard to imagine w=
here that oil is going but if the carb casting has porosity or some other l=
eak maybe that is your problem.=C2=A0 Perhaps it would leak out regardless =
of amount of driving.=C2=A0</div><div dir=3D"auto">-Roland=C2=A0</div></div=
><br><div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Tu=
e, Jun 15, 2021, 9:53 AM Roger Grace via Healeys <<a href=3D"mailto:heal=
eys@autox.team.net">healeys@autox.team.net</a>> wrote:<br></div><blockqu=
ote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc s=
olid;padding-left:1ex"><div dir=3D"ltr"><div>For the SU experts ..<br></div=
><div>Have posted about this problem before=C2=A0 - and no, it has not gone=
away.</div><div>Bought new (not rebuilt) HD8 carbs from SU/Burlen about 7k=
miles ago.</div><div>Problem is excessive use of damper oil.</div><div>Hav=
e to top up about every 1.5 tanks of gas usage.</div><div>Ultra careful abo=
ut filling properly and to feel resistance about 1/2 in above the thread.</=
div><div>Have tried all grades of oil from 20 wt to thick gear oil with no =
change apart from accel. response times. Currently using SAE 30 nd.</div><d=
iv>SU have no real ideas either.</div><div>They are encouraging me to purch=
ase new dampers - pn=20
AUC 8112HB ... pricey too.<br></div><div>I am not convinced that will solve=
it but will do so.<br></div><div>There is some very minor scuffing on the =
valves. See photo.</div><div>The pistons drop freely and there is the class=
ic clunk when raised 1/8 in.<br></div><div>Perhaps this is normal ? maybe o=
ther owners don't check their dashpots as frequently ? heavier springs =
to limit movement ?<br></div><div>any ideas as to what gives most welcome ?=
</div><div>rg<br></div><div><br></div><div><br></div></div>
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