--===============0407196894860446751==
boundary="Apple-Mail=_0C6AC1E5-5B98-4D70-9CBC-0A7E9265F9D7"
--Apple-Mail=_0C6AC1E5-5B98-4D70-9CBC-0A7E9265F9D7
Content-Transfer-Encoding: quoted-printable
charset=utf-8
Forgive my ignorance here but I have never heard of a cam being =
=E2=80=9Chardened=E2=80=9D. As racer for many years and with many race =
engine builds under my belt I have had cams and lifters (and many other =
engine parts) cryogenically treated.=20
I know cranks are hardened by nitriding. But I=E2=80=99ve never know =
anyone to nitride a cam.=20
Richard Mayor
boyracer466@gmail.com
> On May 24, 2023, at 1:08 PM, Michael MacLean =
<springer.mike51@gmail.com> wrote:
>=20
> This thread got me thinking. I had the cam ground at a reputable cam =
grinder locally. (Web Cams) They have been grinding cams for Healeys =
since the 60s. I just got off the phone with them and asked if they had =
hardened the lobes of the cam they ground for me. When they looked it =
up the paperwork showed the cam was simply ground, not hardened. They =
will harden it for $50. Of course it has to come out of the assembled =
engine first. Also Michael, the very experienced Healey engine builder =
that built my short block, who has since passed away, told me to use the =
old used springs for the valves. He said it would tick over nicely at =
700 rpm. Of course through conflicting information I installed new =
double springs. I still have the old springs. As long as I will be =
taking this all apart again, I might as well put just the outer set of =
used springs back on the head.
> Mike MacLean
>=20
> On Wed, May 24, 2023 at 6:47=E2=80=AFAM Michael Salter =
>> Speaking as someone who has over the years had 2 bouts of tappet =
failure in 100 engines I would suggest that you are wise to be cautious.
>> I can't advise on the tappets that you have fitted but can say the I =
am now using sets from A H Spares which are proving to be very =
satisfactory and are different from those I have had problems with.
>> I have, in B.#174, a magnetic oil drain plug and have found that to =
be a very good indicator of impending tappet failure. On the last 2 oil =
changes there was absolutely no metal on the plug.
>> My procedure initial start procedure was to firstly remove the inner =
valve springs as I have found that they and the additional pressure that =
they produce are just not required as my engine exhibits absolutely no =
sign of valve bounce right up to the red line.
>> I use Lucas 20/50 break in oil for the 1st 500 miles.=20
>> On first start I held the engine around 1500 RPM for about 20 =
minutes. (I have difficulty believing that this is necessary but that's =
what the experts recommend so you have to be sure that the cooling =
system is in good shape).
>> I change to VR1 non synthetic 20/50 after 500 odd miles and then =
change the oil every 3000 miles.
>> The engine in B#174 now runs with absolutely NO tappet clatter which =
is pretty unusual for a 100.
>> I recently checked the valve clearances and they were unchanged after =
2500 miles, another good indicator that the cam and tappets are holding =
up well.
>> I'm sure others have had different experiences but I would recommend =
that you make every effort to avoid a cam/tappet failure because =
rectification requires a complete engine strip down.
>> Good luck.
>>=20
>> M
>> (Still running perfectly with outer springs only)
>>=20
>> On Wed., May 24, 2023, 8:46 a.m. Michael MacLean, =
>>> As I get closer to starting my 100 engine I have yet to replace the =
modified Denis Welch tappets like a list member suggested I do. I got =
nervous, so I ordered a set of NOS tappets from Ahead4Healeys to swap =
with the installed Welch tappets recently. Now, searching the archives, =
I find someone had problems with NOS lifters after 6000 miles. Ruined a =
cam and the lifters. So, what am I supposed to do now? Should I just =
buy aftermarket tappets? Are the aftermarket tappets hardened =
correctly? Why wouldn't the NOS tappets be hardened right? I don't =
want to replace the cam after I get this thing running.
>>> Mike MacLean
>>> _______________________________________________
>>> Support Team.Net http://www.team.net/donate.html
>>> Suggested annual donation $12.75
>>>=20
>>> Archive: http://www.team.net/pipermail/healeys =
http://autox.team.net/archive/healeys
>>>=20
>>> http://autox.team.net/mailman/listinfo/healeys
>>>=20
>>> Unsubscribe/Manage: =
http://autox.team.net/mailman/options/healeys/michaelsalter@gmail.com
>>>=20
> _______________________________________________
> Support Team.Net http://www.team.net/donate.html
> Suggested annual donation $12.75
>=20
> Archive: http://www.team.net/pipermail/healeys =
http://autox.team.net/archive/healeys
>=20
> Healeys@autox.team.net
> http://autox.team.net/mailman/listinfo/healeys
>=20
> Unsubscribe/Manage: =
http://autox.team.net/mailman/options/healeys/boyracer466@gmail.com
>=20
--Apple-Mail=_0C6AC1E5-5B98-4D70-9CBC-0A7E9265F9D7
Content-Transfer-Encoding: quoted-printable
charset=utf-8
<html><head><meta http-equiv=3D"content-type" content=3D"text/html; =
charset=3Dutf-8"></head><body style=3D"overflow-wrap: break-word; =
-webkit-nbsp-mode: space; line-break: after-white-space;">Forgive my =
ignorance here but I have never heard of a cam being =E2=80=9Chardened=E2=80=
=9D. As racer for many years and with many race engine builds =
under my belt I have had cams and lifters (and many other engine parts) =
cryogenically treated. <div><br></div><div>I know cranks are =
hardened by nitriding. But I=E2=80=99ve never know anyone to =
nitride a cam. <br><div><br></div><div><div><div><br><div>
<div>Richard =
Mayor</div><div>boyracer466@gmail.com</div><div><br></div><br =
class=3D"Apple-interchange-newline">
</div>
<div><br><blockquote type=3D"cite"><div>On May 24, 2023, at 1:08 PM, =
Michael MacLean <springer.mike51@gmail.com> wrote:</div><br =
class=3D"Apple-interchange-newline"><div><div dir=3D"ltr"><div>This =
thread got me thinking. I had the cam ground at a reputable cam =
grinder locally. (Web Cams) They have been grinding cams for Healeys =
since the 60s. I just got off the phone with them and asked if =
they had hardened the lobes of the cam they ground for me. When =
they looked it up the paperwork showed the cam was simply ground, not =
hardened. They will harden it for $50. Of course it has to =
come out of the assembled engine first. Also Michael, the very =
experienced Healey engine builder that built my short block, who has =
since passed away, told me to use the old used springs for the =
valves. He said it would tick over nicely at 700 rpm. Of =
course through conflicting information I installed new double springs. =
I still have the old springs. As long as I will be taking =
this all apart again, I might as well put just the outer set of used =
springs back on the head.</div><div>Mike MacLean<br></div></div><br><div =
class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Wed, May =
24, 2023 at 6:47=E2=80=AFAM Michael Salter <<a =
href=3D"mailto:michaelsalter@gmail.com"; =
target=3D"_blank">michaelsalter@gmail.com</a>> =
wrote:<br></div><blockquote class=3D"gmail_quote" style=3D"margin:0px =
0px 0px 0.8ex;border-left:1px solid =
rgb(204,204,204);padding-left:1ex"><div dir=3D"auto">Speaking as someone =
who has over the years had 2 bouts of tappet failure in 100 engines I =
would suggest that you are wise to be cautious.<div dir=3D"auto">I can't =
advise on the tappets that you have fitted but can say the I am now =
using sets from A H Spares which are proving to be very satisfactory and =
are different from those I have had problems with.</div><div =
dir=3D"auto">I have, in B.#174, a magnetic oil drain plug and have found =
that to be a very good indicator of impending tappet failure. On the =
last 2 oil changes there was absolutely no metal on the plug.</div><div =
dir=3D"auto">My procedure initial start procedure was to firstly remove =
the inner valve springs as I have found that they and the additional =
pressure that they produce are just not required as my engine exhibits =
absolutely no sign of valve bounce right up to the red line.</div><div =
dir=3D"auto">I use Lucas 20/50 break in oil for the 1st 500 =
miles. </div><div dir=3D"auto">On first start I held the engine =
around 1500 RPM for about 20 minutes. (I have difficulty believing that =
this is necessary but that's what the experts recommend so you have to =
be sure that the cooling system is in good shape).</div><div =
dir=3D"auto">I change to VR1 non synthetic 20/50 after 500 odd miles and =
then change the oil every 3000 miles.</div><div dir=3D"auto">The engine =
in B#174 now runs with absolutely NO tappet clatter which is pretty =
unusual for a 100.</div><div dir=3D"auto">I recently checked the valve =
clearances and they were unchanged after 2500 miles, another good =
indicator that the cam and tappets are holding up well.</div><div =
dir=3D"auto">I'm sure others have had different experiences but I =
would recommend that you make every effort to avoid a cam/tappet failure =
because rectification requires a complete engine strip down.</div><div =
dir=3D"auto">Good luck.</div><div dir=3D"auto"><br></div><div =
dir=3D"auto">M</div><div dir=3D"auto"> (Still running perfectly =
with outer springs only)</div></div><br><div class=3D"gmail_quote"><div =
dir=3D"ltr" class=3D"gmail_attr">On Wed., May 24, 2023, 8:46 a.m. =
Michael MacLean, <<a href=3D"mailto:springer.mike51@gmail.com"; =
target=3D"_blank">springer.mike51@gmail.com</a>> =
wrote:<br></div><blockquote class=3D"gmail_quote" style=3D"margin:0px =
0px 0px 0.8ex;border-left:1px solid =
rgb(204,204,204);padding-left:1ex"><div dir=3D"ltr"><div>As I get closer =
to starting my 100 engine I have yet to replace the modified Denis Welch =
tappets like a list member suggested I do. I got nervous, so I =
ordered a set of NOS tappets from Ahead4Healeys to swap with the =
installed Welch tappets recently. Now, searching the archives, =
I find someone had problems with NOS lifters after 6000 miles. =
Ruined a cam and the lifters. So, what am I supposed to do =
now? Should I just buy aftermarket tappets? Are the =
aftermarket tappets hardened correctly? Why wouldn't the NOS =
tappets be hardened right? I don't want to replace the cam after I =
get this thing running.</div><div>Mike MacLean<br></div></div>
_______________________________________________<br>
rel=3D"noreferrer noreferrer" =
target=3D"_blank">http://www.team.net/donate.html</a><br>
<br>
Archive: <a href=3D"http://www.team.net/pipermail/healeys"; =
rel=3D"noreferrer noreferrer" =
target=3D"_blank">http://www.team.net/pipermail/healeys</a> <a =
href=3D"http://autox.team.net/archive/healeys"; rel=3D"noreferrer =
noreferrer" =
target=3D"_blank">http://autox.team.net/archive/healeys</a><br>
<br>
<a href=3D"mailto:Healeys@autox.team.net"; rel=3D"noreferrer" =
target=3D"_blank">Healeys@autox.team.net</a><br>
<a href=3D"http://autox.team.net/mailman/listinfo/healeys"; =
rel=3D"noreferrer noreferrer" =
target=3D"_blank">http://autox.team.net/mailman/listinfo/healeys</a><br>
<br>
href=3D"http://autox.team.net/mailman/options/healeys/michaelsalter@gmail.=
com" rel=3D"noreferrer noreferrer" =
target=3D"_blank">http://autox.team.net/mailman/options/healeys/michaelsal=
ter@gmail.com</a><br>
<br>
</blockquote></div>
</blockquote></div>
_______________________________________________<br>Support Team.Net =
$12.75<br><br>Archive: http://www.team.net/pipermail/healeys =
http://autox.team.net/archive/healeys<br><br>Healeys@autox.team.net<br>htt=
p://autox.team.net/mailman/listinfo/healeys<br><br>Unsubscribe/Manage: =
http://autox.team.net/mailman/options/healeys/boyracer466@gmail.com<br><br=
></div></blockquote></div><br></div></div></div></div></body></html>=
--Apple-Mail=_0C6AC1E5-5B98-4D70-9CBC-0A7E9265F9D7--
--===============0407196894860446751==
Content-Transfer-Encoding: 7bit
Content-Disposition: inline
_______________________________________________
Archive: http://www.team.net/pipermail/healeys
http://autox.team.net/archive/healeys
Healeys@autox.team.net
http://autox.team.net/mailman/listinfo/healeys
--===============0407196894860446751==--
|