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The first sign of problems was having to adjust the tappets which had
initially been silent after 2000 miles and then again at 4500.
After adjusting they were still audible and had previously been silent.
Then at the 2000 and 4000 mile oil changes there was "fir" in the drain
plug magnet.
I'm very disappointed to have destroyed a very low mileage "M" cam and a
set of NOS lifters that I had been saving for decades.
I'm seriously considering having silicon nitride lifters manufactured but
at over $1000 a set its a serious investment.
M
On Wed., Aug. 4, 2021, 10:47 a.m. Steven Kingsbury, <
airtightproductions@icloud.com> wrote:
> I just rebuilt my 100 engine and purchased my lifters from AH Spares in
> the UK. These were their new design for better oil flow. I now have 1000
> miles or so on the new engine and once I got my problems figured out with
> my distributor, the car is running well and smooth.
> Now I'm wondering when the other shoe is going to drop! What problems
> did you have pointing you to the lifters as the source of those problems?
> When I retorqued the head, I readjusted the rockers and found no problems.
> They were a little off, but I expected a little.
> What should I be looking for? I used Driven Break In oil and then I
> switched to VR1 like you after 500 miles. I have been driving the car to
> build up some trust in it and it's turning in to a joy to drive. I've got M
> mods on this engine, cam, H6 carbs, M pistons and these new lifters. So
> far, so good.
> Thanks for your help,
> Steven Kingsbury
> BN1
>
> On August 3, 2021 at 5:19 PM, Michael Salter via Healeys <
> healeys@autox.team.net> wrote:
>
> After only 6000 miles the NOS BMC lifters that I installed in my engine
> with a very low mileage "M" cam have started to deteriorate.
> This engine has had a steady diet of VR1 non synthetic and it has had 4
> changes in 6K miles.
> Very disappointing.
> I'm considering trying bucket type Buick lifters with longer push rods
> and a new cam.
> Does anyone have experience with the durability of the old Buick lifters
> ... getting a little desperate here.
> Fortunately I caught this issue before it ruined the engine.
>
> M
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Content-Transfer-Encoding: quoted-printable
<div dir=3D"auto">The first sign of problems was having to adjust the tappe=
ts which had initially been silent after 2000 miles and then again at 4500.=
<div dir=3D"auto">After adjusting they were still audible and had previousl=
y been silent.</div><div dir=3D"auto">Then at the 2000 and 4000 mile oil ch=
anges there was "fir" in the drain plug magnet.</div><div dir=3D"=
auto">I'm very disappointed to have destroyed a very low mileage "=
M" cam and a set of NOS lifters that I had been saving for decades.</d=
iv><div dir=3D"auto">I'm seriously considering having silicon nitride l=
ifters manufactured but at over $1000 a set its a serious investment.</div>=
<div dir=3D"auto"><br></div><div dir=3D"auto">M</div></div><br><div class=
=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Wed., Aug. 4, 202=
1, 10:47 a.m. Steven Kingsbury, <<a href=3D"mailto:airtightproductions@i=
cloud.com">airtightproductions@icloud.com</a>> wrote:<br></div><blockquo=
te class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc so=
lid;padding-left:1ex"><div><div>I just rebuilt my 100 engine and purchased =
my lifters from AH Spares in the UK. These were their new design for better=
oil flow. I now have 1000 miles or so on the new engine and once I got my =
problems figured out with my distributor, the car is running well and smoot=
h.</div><div>=C2=A0=C2=A0=C2=A0Now I'm wondering when the other shoe is=
going to drop! What problems did you have pointing you to the lifters as t=
he source of those problems? When I retorqued the head, I readjusted the ro=
ckers and found no problems. They were a little off, but I expected a littl=
e.</div><div>=C2=A0=C2=A0=C2=A0What should I be looking for? I used Driven =
Break In oil and then I switched to VR1 like you after 500 miles. I have be=
en driving the car to build up some trust in it and it's turning in to =
a joy to drive. I've got M mods on this engine, cam, H6 carbs, M piston=
s and these new lifters. So far, so good.=C2=A0</div><div>=C2=A0=C2=A0=C2=
=A0Thanks for your help,</div><div>Steven Kingsbury</div><div>BN1</div><div=
><br>On August 3, 2021 at 5:19 PM, Michael Salter via Healeys <<a href=
=3D"mailto:healeys@autox.team.net"; target=3D"_blank" rel=3D"noreferrer">hea=
leys@autox.team.net</a>> wrote:<br><br></div><div><blockquote type=3D"ci=
te"><div><div dir=3D"auto">After only 6000 miles the NOS BMC lifters that I=
installed in my engine with a very low mileage "M" cam have star=
ted to deteriorate.=C2=A0<div dir=3D"auto">This engine has had a steady die=
t of VR1 non synthetic and it has had 4 changes in 6K miles.=C2=A0</div><di=
v dir=3D"auto">Very disappointing.=C2=A0</div><div dir=3D"auto">I'm=C2=
=A0 considering trying bucket type Buick lifters with longer push rods and =
a new cam.</div><div dir=3D"auto">Does anyone have experience with the dura=
bility of the old Buick lifters ... getting a little desperate here.</div><=
div dir=3D"auto">Fortunately I caught this issue before it ruined the engin=
e.</div><div dir=3D"auto"><br></div><div dir=3D"auto">M</div></div><div><sp=
an>_______________________________________________<br>Support <a href=3D"ht=
tp://Team.Net" target=3D"_blank" rel=3D"noreferrer">Team.Net</a> <a href=3D=
"http://www.team.net/donate.html"; target=3D"_blank" rel=3D"noreferrer">http=
://www.team.net/donate.html</a><br>Suggested annual donation $12.75<br><br>=
Archive: <a href=3D"http://www.team.net/pipermail/healeys"; target=3D"_blank=
" rel=3D"noreferrer">http://www.team.net/pipermail/healeys</a> <a href=3D"h=
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target=3D"_blank" rel=3D"noreferrer">Healeys@autox.team.net</a><br><a href=
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nsubscribe/Manage: <a href=3D"http://autox.team.net/mailman/options/healeys=
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<br><br></span></div></div></blockquote></div></div></blockquote></div>
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