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Listers / Wayne
I was thinking about the way the cam lobes are lubricated in the original c=
onfiguration ( stock parts). Please chime in if this is way off.=20
It would seem most of the lubrication comes from the steady drip that comes=
out at the rocker and runs down the pushrod. First the tappets (lifters) g=
et some oil, then passes by the lifter and then on to the cam lobe.=20
The oil dripping from the rocker shaft bushings drips onto the top of the h=
ead and drops through the pushrod holes to the lifter gallery. On some worn=
out engines this is a flood instead of a drip. Then you have the oil fog t=
hat is in the crank case/oil pan area when the engine is running due to the=
squirt of oil coming out of the piston rods big ends. The intent was to oi=
l down the piston bores but coats pretty much everything.
The bucket lifters, which by the way was an old hot rod trick from the earl=
y days of Austin Healeys, using lighter weight lifters out of a straight ei=
ght Oldsmobile (if I remember correctly) and longer pushrods may or may not=
be drilled to allow oil to the cam lobe/lifter face. Some guys used pressu=
rized oil to squirt the interface when the bucket was not drilled. The buck=
et lifters sold years ago that did not have a hole in the lifters had failu=
re problems. A hole was added but the problem with the drilled hole in the =
bucket it could clog and there was little to no lubrication of the cam lobe=
s, thus major wear. =20
I=E2=80=99m not suggesting that the can lobe failure was caused by a plugge=
d hole in the lifter since I did not work on this engine. But it is a possi=
bility.=20
Perry
Sent from Mail for Windows 10
From: Wayne Schultz
Sent: Monday, April 27, 2020 4:49 PM
To: healeys@autox.team.net
Subject: [Healeys] Oil Additives
Hello everyone, I recently completed=C2=A0a rebuild of the engine in my Hea=
ley 3000. At 48K miles i noticed metal during an oil change. I dropped my o=
il pan and found even more metal and a silver ring in the block that lined =
up with a cam lobe. I had been using Mobil 1 for years and always had good =
oil pressure and a very quiet motor.=C2=A0 I pulled the motor and upon tear=
down I found one bad cam lobe and several lifters that had mild pitting.=C2=
=A0 I thought about how I used my car and came to conclusion=C2=A0 I, rathe=
r than the oil might=C2=A0be=C2=A0the=C2=A0 reason for the cam failure.=C2=
=A0 I drove my car every couple of weeks in nice weather. This is just enou=
gh time for the oil to leave the cam and lifters to drain into the pan. Thi=
s meant the next time I started the engine the cam and lifters=C2=A0might h=
ave been metal on metal.=C2=A0 My new lifters are short bucket lifters with=
a drain hole to lubricate=C2=A0the cam lobes. Now using VR-1 20/50
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--></style></head><body lang=3DEN-US link=3Dblue vlink=3D"#954F72"><div cla=
ss=3DWordSection1><p class=3DMsoNormal>Listers / Wayne</p><p class=3DMsoNor=
mal>I was thinking about the way the cam lobes are lubricated in the origin=
al configuration ( stock parts). Please chime in if this is way off. </p><p=
class=3DMsoNormal>It would seem most of the lubrication comes from the ste=
ady drip that comes out at the rocker and runs down the pushrod. First the =
tappets (lifters) get some oil, then passes by the lifter and then on to th=
e cam lobe. </p><p class=3DMsoNormal>The oil dripping from the rocker shaft=
bushings drips onto the top of the head and drops through the pushrod hole=
s to the lifter gallery. On some worn out engines this is a flood instead o=
f a drip. Then you have the oil fog that is in the crank case/oil pan area =
when the engine is running due to the squirt of oil coming out of the pisto=
n rods big ends. The intent was to oil down the piston bores but coats pret=
ty much everything.</p><p class=3DMsoNormal>The bucket lifters, which by th=
e way was an old hot rod trick from the early days of Austin Healeys, using=
lighter weight lifters out of a straight eight Oldsmobile (if I remember c=
orrectly) and longer pushrods may or may not be drilled to allow oil to the=
cam lobe/lifter face. Some guys used pressurized oil to squirt the interfa=
ce when the bucket was not drilled. The bucket lifters sold years ago that =
did not have a hole in the lifters had failure problems. A hole was added b=
ut the problem with the drilled hole in the bucket it could clog and there =
was little to no lubrication of the cam lobes, thus major wear. =C2=A0</p><=
p class=3DMsoNormal>I=E2=80=99m not suggesting that the can lobe failure wa=
s caused by a plugged hole in the lifter since I did not work on this engin=
e. But it is a possibility. </p><p class=3DMsoNormal>Perry</p><p class=3DMs=
oNormal><o:p> </o:p></p><p class=3DMsoNormal>Sent from <a href=3D"http=
s://go.microsoft.com/fwlink/?LinkId=3D550986">Mail</a> for Windows 10</p><p=
class=3DMsoNormal><o:p> </o:p></p><div style=3D'mso-element:para-bord=
er-div;border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in=
'><p class=3DMsoNormal style=3D'border:none;padding:0in'><b>From: </b><a hr=
ef=3D"mailto:waschu2@gmail.com";>Wayne Schultz</a><br><b>Sent: </b>Monday, A=
pril 27, 2020 4:49 PM<br><b>To: </b><a href=3D"mailto:healeys@autox.team.ne=
t">healeys@autox.team.net</a><br><b>Subject: </b>[Healeys] Oil Additives</p=
></div><p class=3DMsoNormal><o:p> </o:p></p><div><p class=3DMsoNormal>=
Hello everyone, I recently completed a rebuild of the engine in my Hea=
ley 3000. At 48K miles i noticed metal during an oil change. I dropped my o=
il pan and found even more metal and a silver ring in the block that lined =
up with a cam lobe. I had been using Mobil 1 for years and always had good =
oil pressure and a very quiet motor. I pulled the motor and upon tear=
down I found one bad cam lobe and several lifters that had mild pitting.&nb=
sp; I thought about how I used my car and came to conclusion I, rathe=
r than the oil might be the reason for the cam failure.&nbs=
p; I drove my car every couple of weeks in nice weather. This is just enoug=
h time for the oil to leave the cam and lifters to drain into the pan. This=
meant the next time I started the engine the cam and lifters might ha=
ve been metal on metal. My new lifters are short bucket lifters with =
a drain hole to lubricate the cam lobes. Now using VR-1 20/50</p></div=
><p class=3DMsoNormal><o:p> </o:p></p><p class=3DMsoNormal><o:p> =
</o:p></p></div></body></html>=
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