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<html><head><meta http-equiv=3D"content-type" content=3D"text/html; charset=3D=
utf-8"></head><body dir=3D"auto"><div dir=3D"ltr"></div><div dir=3D"ltr">If t=
here is excess oil in the rocker cover, and there is no compression issue, a=
nd no rocker wear issue, then there is a cam bearing installation issue.&nbs=
p;</div><div dir=3D"ltr">The cam bearing has 2 holes in it. Install it upsid=
e down, and youve failed to restrict oil flow to the rockers. Oil everywhere=
. </div><div dir=3D"ltr">Check the workshop manual. </div><div dir=
=3D"ltr">Best</div><div dir=3D"ltr">Chris </div><div dir=3D"ltr"><br><b=
lockquote type=3D"cite">On 18 Nov 2025, at 7:15=E2=80=AFam, Steven Kingsbury=
via Healeys <healeys@autox.team.net> wrote:<br><br></blockquote></div=
><blockquote type=3D"cite"><div dir=3D"ltr">=EF=BB=BF<div><div>Here's some m=
ore information I received about the problem and I think this bit of info re=
ally helps to diagnose the problem: "<span style=3D"color: rgba(0, 0, 0, 0.8=
8); font-style: normal; font-variant-ligatures: normal; font-variant-caps: n=
ormal; font-weight: 300; letter-spacing: -0.37px; orphans: 2; text-align: st=
art; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -=
webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(25=
5, 255, 255); text-decoration-thickness: initial; text-decoration-style: ini=
tial; text-decoration-color: initial; float: none; display: inline !importan=
t;"><span style=3D"font-family:"SF Pro Text", system-ui, sans-seri=
f" class=3D"font"><span style=3D"font-size:17px" class=3D"size">That engine c=
ame with a "gulp"valve to control pollution and the engine itself was a seal=
ed system. If those items were removed when put into a Bugeye "naked" (=
no pump) that could build a lot of blowby with no place for the pressure to e=
xit." So that is why the old fuel pump mount is being used and by checking o=
n another forum, some folks have been successful in using this outlet, but i=
t does require some special plumbing. We are now going to try something simi=
lar to what was described there. Plumbers hats firmly in place, we'll give i=
t a go. Stay tuned!</span></span></span></div><div><span style=3D"color: rgb=
a(0, 0, 0, 0.88); font-style: normal; font-variant-ligatures: normal; font-v=
ariant-caps: normal; font-weight: 300; letter-spacing: -0.37px; orphans: 2; t=
ext-align: start; text-indent: 0px; text-transform: none; widows: 2; word-sp=
acing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-=
color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decorati=
on-style: initial; text-decoration-color: initial; float: none; display: inl=
ine !important;"><span style=3D"font-family:"SF Pro Text", system-=
ui, sans-serif" class=3D"font"><span style=3D"font-size:17px" class=3D"size"=
>Steven</span></span></span><br></div><div><br></div><blockquote type=3D"cit=
e"><div>On Nov 16, 2025, at 4:27 PM, Harold Manifold <manifold@telus.net&=
gt; wrote:</div><div><br></div><div><br></div><div><div dir=3D"ltr"><div>Hi S=
teve,</div><div><br></div><div>Having read your update and seeing that you h=
ave eliminated the cylinder head as the source of the issue, I wanted to tak=
e another shot at the problem.</div><div><br></div><div>The recent compressi=
on test results may be shedding light on the issue. Based on your readings, t=
he ratio of the lowest to the highest compression is 75% when cold (120/160)=
and 79% when hot (130/165). While not an absolute rule, a general rule of t=
humb for a smoothly running engine is a ratio of 90% or greater. A freshly r=
ebuilt engine showing 75% is not a good sign. Could you try adding a small a=
mount of oil to the third cylinder and retesting the compression?</div><div>=
<br></div><div>If poor piston ring sealing is causing excessive blow-by, thi=
s increased pressure in the bottom of the engine could overwhelm the crankca=
se ventilation system.</div><div><br></div><div>Though I'm not an expert on t=
he BMC A-series engine, I recall the crankcase breather usually attaches to t=
he tappet cover on the side of the engine. It sounds like the current breath=
er setup on your neighbor's engine=E2=80=94located where the old fuel pump a=
ttached=E2=80=94might be too low and too close to the oil in the sump. Does t=
his engine have a breather on the tappet cover, and does air pass through it=
easily?</div><div><br></div><div>Good luck with the continued investigation=
.</div><div><br></div><div>Regards,</div><div>Harold</div></div><div><br></d=
iv><div class=3D"gmail_quote gmail_quote_container"><div dir=3D"ltr" class=3D=
"gmail_attr">On Sun, Nov 16, 2025 at 1:14=E2=80=AFPM Michael Salter <<a h=
ref=3D"mailto:michael.salter@gmail.com";>michael.salter@gmail.com</a>> wro=
te:</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><div dir=3D"a=
uto" style=3D"font-family:Aptos,Aptos_MSFontService,-apple-system,Roboto,Ari=
al,Helvetica,sans-serif;font-size:12pt;color:rgb(33,33,33)">In my experience=
Steven, that's not how it works with piston rings. </div><div dir=3D"a=
uto" style=3D"font-family:Aptos,Aptos_MSFontService,-apple-system,Roboto,Ari=
al,Helvetica,sans-serif;font-size:12pt;color:rgb(33,33,33)">Rings are specif=
ic to a particular bore size. If the bore is say 0.010" oversize then 0.010"=
oversize rings are what must be fitted. </div><div dir=3D"auto" style=3D=
"font-family:Aptos,Aptos_MSFontService,-apple-system,Roboto,Arial,Helvetica,=
sans-serif;font-size:12pt;color:rgb(33,33,33)">Installing an oversize of rin=
g without accurately measuring the bore and checking that the pistons and ri=
ngs are correct for that bore just won't work.</div><div dir=3D"auto" s=
tyle=3D"font-family:Aptos,Aptos_MSFontService,-apple-system,Roboto,Arial,Hel=
vetica,sans-serif;font-size:12pt;color:rgb(33,33,33)"><br></div><div dir=3D"=
auto" style=3D"font-family:Aptos,Aptos_MSFontService,-apple-system,Roboto,Ar=
ial,Helvetica,sans-serif;font-size:12pt;color:rgb(33,33,33)">M</div><div id=3D=
"m_-871980063844760471ms-outlook-mobile-body-separator-line" style=3D"font-f=
amily:Aptos,Aptos_MSFontService,-apple-system,Roboto,Arial,Helvetica,sans-se=
rif;font-size:12pt" dir=3D"auto"><div style=3D"font-family:Aptos,Aptos_MSFon=
tService,-apple-system,Roboto,Arial,Helvetica,sans-serif;font-size:12pt" dir=
=3D"auto"><br></div></div><div style=3D"font-family:Aptos,Aptos_MSFontServic=
e,-apple-system,Roboto,Arial,Helvetica,sans-serif;font-size:12pt" id=3D"m_-8=
71980063844760471ms-outlook-mobile-signature" dir=3D"auto"><div style=3D"fon=
t-family:Aptos,Aptos_MSFontService,-apple-system,Roboto,Arial,Helvetica,sans=
-serif;font-size:12pt" dir=3D"auto"><br></div></div><div><hr style=3D"displa=
y:inline-block;width:98%"><br></div><div id=3D"m_-871980063844760471divRplyFw=
dMsg" dir=3D"ltr"><div><span style=3D"font-family:Calibri, sans-serif" class=
=3D"font"><span style=3D"color:#000000" class=3D"color"><b>From:</b> Steven K=
ingsbury <<a href=3D"mailto:airtightproductions@me.com";>airtightproductio=
ns@me.com</a>><br> <b>Sent:</b> Sunday, November 16, 2025 2:24:30 PM<br> <=
b>To:</b> Harold Manifold <<a href=3D"mailto:manifold@telus.net";>manifold=
@telus.net</a>><br> <b>Cc:</b> Michael Salter <<a href=3D"mailto:micha=
el.salter@gmail.com">michael.salter@gmail.com</a>>; Healey Mail List <=
<a href=3D"mailto:healeys@autox.team.net";>healeys@autox.team.net</a>><br>=
<b>Subject:</b> Re: [Healeys] Sprite question for my neighbor</span></span>=
</div><div> </div></div><div><div><br></div><div style=3D"color:rgba(0,=
0,0,0.88);font-family:"SF Pro Text",system-ui,sans-serif;font-size=
:17px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:norm=
al;font-weight:300;letter-spacing:-0.37px;text-align:start;text-indent:0px;t=
ext-transform:none;word-spacing:0px;white-space:normal;background-color:rgb(=
255,255,255);text-decoration-style:initial;text-decoration-color:initial">Th=
e engine was a fresh rebuild when bought. The car was sold because of the ex=
cessive oil blowing out after the fresh rebuild. The head was taken off and e=
xamined at a local machine shop and passed with flying colors. The pistons a=
nd rings were also taken to
the shop where the machinist remarked that the rings might have been too sm=
all and suggested 10 over rings. New rings went on, everything put back into=
the engine and again, it runs great, just blows the oil all over the place!=
</div><div style=3D"color:rgba(0,0,0,0.88);font-family:"SF Pro Te=
xt",system-ui,sans-serif;font-size:17px;font-style:normal;font-variant-=
ligatures:normal;font-variant-caps:normal;font-weight:300;letter-spacing:-0.=
37px;text-align:start;text-indent:0px;text-transform:none;word-spacing:0px;w=
hite-space:normal;background-color:rgb(255,255,255);text-decoration-style:in=
itial;text-decoration-color:initial">Michael, compression test today after a=
bit over 100 miles with the new rings: 160, 148, 120, 130. Saw some suggest=
ions on an MG forum for fixing crankcase ventilation. Will see what my neigh=
bor decides to do and will update later. Thanks all for the words.</div><div=
style=3D"color:rgba(0,0,0,0.88);font-family:"SF Pro Text",system-=
ui,sans-serif;font-size:17px;font-style:normal;font-variant-ligatures:normal=
;font-variant-caps:normal;font-weight:300;letter-spacing:-0.37px;text-align:=
start;text-indent:0px;text-transform:none;word-spacing:0px;white-space:norma=
l;background-color:rgb(255,255,255);text-decoration-style:initial;text-decor=
ation-color:initial">And just now, after driving the car another forty miles=
or so, the compression now sits at: 165, 155, 130, 150. So that's getting b=
etter. Will definitely take a closer look at the rocker shaft and bushings. A=
gain, thanks to all for the possible foibles facing
this engine.</div><div style=3D"color:rgba(0,0,0,0.88);font-family:"SF=
Pro Text",system-ui,sans-serif;font-size:17px;font-style:normal;font-v=
ariant-ligatures:normal;font-variant-caps:normal;font-weight:300;letter-spac=
ing:-0.37px;text-align:start;text-indent:0px;text-transform:none;word-spacin=
g:0px;white-space:normal;background-color:rgb(255,255,255);text-decoration-s=
tyle:initial;text-decoration-color:initial">Steven </div><div><div><br>=
</div><blockquote type=3D"cite"><div>On Nov 16, 2025, at 8:52 AM, Harold Man=
ifold <<a href=3D"mailto:manifold@telus.net";>manifold@telus.net</a>> w=
rote:</div><div><br></div><div><br></div><div><div dir=3D"ltr"><div>Hi Steve=
,</div><div><br></div><div>The issue you described with your neighbor's 1275=
engine may be related to a similar problem I've encountered.</div><div><br>=
</div><div>I know of a recently rebuilt engine that experienced comparable e=
xcessive oil blow-by. The cause, in that case, was a poorly refurbished and r=
efitted rocker shaft and bushings. Without adequate restriction between the r=
ocker shaft and the bushings to regulate
the oil flow, it resulted in an excessive amount of oil being pumped to the=
top of the engine.</div><div><br></div><div>I hope this provides another av=
enue for investigation.</div><div><br></div><div>Regards,</div><div>Harold</=
div></div><div><br></div><div><div dir=3D"ltr">On Sat, Nov 15, 2025 at 1:12=E2=
=80=AFPM Michael Salter <<a href=3D"mailto:michael.salter@gmail.com";>mich=
ael.salter@gmail.com</a>> wrote:</div><blockquote style=3D"margin:0px 0px=
0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div><di=
v dir=3D"auto" style=3D"font-family:Aptos,Aptos_MSFontService,-apple-system,=
Roboto,Arial,Helvetica,sans-serif;font-size:12pt;color:rgb(33,33,33)">Hi Ste=
ve, what you describe sounds to me like excessive blow-by. </div><div d=
ir=3D"auto" style=3D"font-family:Aptos,Aptos_MSFontService,-apple-system,Rob=
oto,Arial,Helvetica,sans-serif;font-size:12pt;color:rgb(33,33,33)">I would r=
ecommend a compression test before going too much further. </div><div d=
ir=3D"auto" style=3D"font-family:Aptos,Aptos_MSFontService,-apple-system,Rob=
oto,Arial,Helvetica,sans-serif;font-size:12pt;color:rgb(33,33,33)"><br></div=
><div dir=3D"auto" style=3D"font-family:Aptos,Aptos_MSFontService,-apple-sys=
tem,Roboto,Arial,Helvetica,sans-serif;font-size:12pt;color:rgb(33,33,33)">M<=
/div><div id=3D"m_-871980063844760471x_m_8735642865022924963ms-outlook-mobil=
e-body-separator-line" style=3D"font-family:Aptos,Aptos_MSFontService,-apple=
-system,Roboto,Arial,Helvetica,sans-serif;font-size:12pt"><div style=3D"font=
-family:Aptos,Aptos_MSFontService,-apple-system,Roboto,Arial,Helvetica,sans-=
serif;font-size:12pt"><br></div></div><div id=3D"m_-871980063844760471x_m_87=
35642865022924963ms-outlook-mobile-signature" style=3D"font-family:Aptos,Apt=
os_MSFontService,-apple-system,Roboto,Arial,Helvetica,sans-serif;font-size:1=
2pt"><div style=3D"font-family:Aptos,Aptos_MSFontService,-apple-system,Robot=
o,Arial,Helvetica,sans-serif;font-size:12pt"><br></div></div><div><hr style=3D=
"display:inline-block;width:98%"><br></div><div id=3D"m_-871980063844760471x=
_m_8735642865022924963divRplyFwdMsg" dir=3D"ltr"><div><span style=3D"font-fa=
mily:Calibri, sans-serif" class=3D"font"><span style=3D"color:rgb(0,0,0)"><b=
>From:</b> Healeys <<a href=3D"mailto:healeys-bounces@autox.team.net";>hea=
leys-bounces@autox.team.net</a>> on behalf of Steven Kingsbury via Healey=
s
<<a href=3D"mailto:healeys@autox.team.net";>healeys@autox.team.net</a>>=
;<br> <b>Sent:</b> Saturday, November 15, 2025 3:33:19 PM<br> <b>To:</b> Hea=
ley Mail List <<a href=3D"mailto:healeys@autox.team.net";>healeys@autox.te=
am.net</a>><br> <b>Subject:</b> [Healeys] Sprite question for my neighbor=
</span></span></div><div> </div></div><div><div>My neighbor bought a bu=
geye that had a 1275 engine put in it. It runs well, but blows oil like craz=
y out of the oil cap on the valve cover. It does not have a timing cover ven=
tilation valve, but a fitting was made to fit onto where the old fuel pump f=
it
on the side of the crankcase/block. When he hooked the hose from that fitti=
ng to the carbs, oil was no longer being blown out, but oil was then being s=
ucked into the carbs and he was burning oil like crazy.</div><div><br></div>=
<div>It seems the pressure in the crankcase is so great it is pushing oil up=
the push rods into the rocker assembly, out the filler cap and all over the=
engine. I'm not familiar with the 1275 and have no ideas on how to vent the=
pressure in the crankcase. Can
anyone of you guys point me to a possible solution? Thanks in advance for t=
he advice.</div><div>Steven Kingsbury</div><div>BN1</div></div></div><div>__=
_____________________________________________</div><div>Support <a rel=3D"no=
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