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I was going to suggest a 'gun-drilled' cam from DWM, but it appears
they don't make them for the 4-cyl cars. Putting extra oil on the
wear surfaces has to be a good thing.<br>
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<div class="moz-cite-prefix">On 8/5/2021 5:39 AM, Michael Salter
wrote:<br>
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<div dir="auto">The first sign of problems was having to adjust
the tappets which had initially been silent after 2000 miles and
then again at 4500.
<div dir="auto">After adjusting they were still audible and had
previously been silent.</div>
<div dir="auto">Then at the 2000 and 4000 mile oil changes there
was "fir" in the drain plug magnet.</div>
<div dir="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.</div>
<div dir="auto">I'm seriously considering having silicon nitride
lifters manufactured but at over $1000 a set its a serious
investment.</div>
<div dir="auto"><br>
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<div dir="auto">M</div>
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<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Wed., Aug. 4, 2021, 10:47
a.m. Steven Kingsbury, <<a
href="mailto:airtightproductions@icloud.com"
moz-do-not-send="true">airtightproductions@icloud.com</a>>
wrote:<br>
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<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 smooth.</div>
<div> 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.</div>
<div> 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. </div>
<div> Thanks 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="mailto:healeys@autox.team.net"
target="_blank" rel="noreferrer" moz-do-not-send="true">healeys@autox.team.net</a>>
wrote:<br>
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<div dir="auto">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.
<div dir="auto">This engine has had a steady diet of
VR1 non synthetic and it has had 4 changes in 6K
miles. </div>
<div dir="auto">Very disappointing. </div>
<div dir="auto">I'm considering trying bucket type
Buick lifters with longer push rods and a new cam.</div>
<div dir="auto">Does anyone have experience with the
durability of the old Buick lifters ... getting a
little desperate here.</div>
<div dir="auto">Fortunately I caught this issue
before it ruined the engine.</div>
<div dir="auto"><br>
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<div dir="auto">M</div>
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